diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Convention/MaxStringLengthConvention .cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Convention/MaxStringLengthConvention .cs
new file mode 100644
index 000000000..e15a8e573
--- /dev/null
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Convention/MaxStringLengthConvention .cs	
@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using Microsoft.EntityFrameworkCore.Metadata.Conventions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace IRaCIS.Core.Test
+{
+    /// <summary>
+    /// Efcore 最新支持批量配置字符串类型长度作为保底的    官网参考：https://learn.microsoft.com/zh-cn/ef/core/modeling/bulk-configuration#conventions
+    /// </summary>
+    public class MaxStringLengthConvention : IModelFinalizingConvention
+    {
+        public void ProcessModelFinalizing(IConventionModelBuilder modelBuilder, IConventionContext<IConventionModelBuilder> context)
+        {
+            foreach (var property in modelBuilder.Metadata.GetEntityTypes()
+                         .SelectMany(
+                             entityType => entityType.GetDeclaredProperties()
+                                 .Where(
+                                     property => property.ClrType == typeof(string))))
+            {
+                property.Builder.HasMaxLength(200);  
+            }
+        }
+    }
+
+}
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Convention/MigrationRemoveForeignKeysSqlGenerator .cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Convention/MigrationRemoveForeignKeysSqlGenerator .cs
new file mode 100644
index 000000000..dae427d53
--- /dev/null
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Convention/MigrationRemoveForeignKeysSqlGenerator .cs	
@@ -0,0 +1,30 @@
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Migrations.Operations;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Convention
+{
+    public class MigrationRemoveForeignKeysSqlGenerator : MigrationsSqlGenerator
+    {
+        public MigrationRemoveForeignKeysSqlGenerator(MigrationsSqlGeneratorDependencies dependencies, IMigrationsAnnotationProvider migrationsAnnotations) : base(dependencies)
+        {
+        }
+
+        protected override void Generate(Microsoft.EntityFrameworkCore.Migrations.Operations.CreateTableOperation operation, IModel? model, MigrationCommandListBuilder builder, bool terminate = true)
+        {
+            operation.ForeignKeys.Clear();
+            base.Generate(operation, model, builder, terminate);
+        }
+
+        protected override void Generate(AddForeignKeyOperation operation, IModel? model, MigrationCommandListBuilder builder,
+        bool terminate = true)
+        {
+            return;
+        }
+    }
+}
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/IRCContext.cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/IRCContext.cs
index 099056b6f..d8c0ed818 100644
--- a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/IRCContext.cs
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/IRCContext.cs
@@ -3,7 +3,10 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
 using IRaCIS.Core.Test.CodeFirstTest.MSSQL;
+using IRaCIS.Core.Test.CodeFirstTest.MSSQL.Convention;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.Extensions.Options;
 
 namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL;
 
@@ -30,8 +33,20 @@ public partial class IRCContext : DbContext
     public virtual DbSet<ReadingClinicalData> ReadingClinicalData { get; set; }
     public virtual DbSet<ReadModule> ReadModule { get; set; }
 
+    public virtual DbSet<TestStringLength> TestStringLength { get; set; }
+
+    public virtual DbSet<Project> Project { get; set; }
+
+    public virtual DbSet<ProjectUser> ProjectUser { get; set; }
+
+
     protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
-        => optionsBuilder.UseSqlServer("Server=106.14.89.110,1433;Database=IRC_Code;User ID=sa;Password=mssql_KnTs2a;TrustServerCertificate=true");
+    {
+        optionsBuilder.UseSqlServer("Server=106.14.89.110,1433;Database=IRC_Code;User ID=sa;Password=mssql_KnTs2a;TrustServerCertificate=true");
+
+        //移除外键约束
+        optionsBuilder.ReplaceService<IMigrationsSqlGenerator, MigrationRemoveForeignKeysSqlGenerator>();
+    }
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
@@ -43,9 +58,15 @@ public partial class IRCContext : DbContext
             modelBuilder.ApplyConfiguration(configurationInstance);
         }
 
+       
 
         OnModelCreatingPartial(modelBuilder);
     }
+    protected override void ConfigureConventions(ModelConfigurationBuilder configurationBuilder)
+    {
+        //针对字符串使用默认的长度配置
+        configurationBuilder.Conventions.Add(_ => new MaxStringLengthConvention());
+    }
 
     partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
 }
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911143331_testMaxLength.Designer.cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911143331_testMaxLength.Designer.cs
new file mode 100644
index 000000000..6afdc346a
--- /dev/null
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911143331_testMaxLength.Designer.cs
@@ -0,0 +1,356 @@
+// <auto-generated />
+using System;
+using IRaCIS.Core.Test.CodeFirstTest.MSSQL;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
+{
+    [DbContext(typeof(IRCContext))]
+    [Migration("20240911143331_testMaxLength")]
+    partial class testMaxLength
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.8")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Code")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<Guid?>("ConfigTypeId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid?>("ParentId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ConfigTypeId");
+
+                    b.HasIndex("ParentId");
+
+                    b.ToTable("Dictionary");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadModule", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("ReadModule");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadingClinicalData", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Code")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid>("ReadingId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ReadingId");
+
+                    b.ToTable("ReadingClinicalData");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid>("SubjectId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SubjectId");
+
+                    b.ToTable("SubejectVisit");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid?>("FinalSubjectVisitId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid?>("LatestSubjectVisitId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("FinalSubjectVisitId");
+
+                    b.HasIndex("LatestSubjectVisitId");
+
+                    b.ToTable("Subject");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestNew", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("TestName")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("nvarchar(100)");
+
+                    b.Property<Guid>("TrialImageDownloadId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("TrialImageDownloadId");
+
+                    b.ToTable("TestNew");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime?>("DownloadEndTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<DateTime>("DownloadStartTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int>("ImageCount")
+                        .HasColumnType("int");
+
+                    b.Property<long>("ImageSize")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("ImageType")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsSuccess")
+                        .HasColumnType("bit");
+
+                    b.Property<Guid>("SubjectVisitId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("TrialImageDownload");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", "ConfigType")
+                        .WithMany()
+                        .HasForeignKey("ConfigTypeId");
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", "Parent")
+                        .WithMany("ChildList")
+                        .HasForeignKey("ParentId");
+
+                    b.Navigation("ConfigType");
+
+                    b.Navigation("Parent");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadingClinicalData", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadModule", "ReadModule")
+                        .WithMany()
+                        .HasForeignKey("ReadingId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "SubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("ReadingId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ReadModule");
+
+                    b.Navigation("SubjectVisit");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", "Subject")
+                        .WithMany("SubejectVisitList")
+                        .HasForeignKey("SubjectId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Subject");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "FinalSubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("FinalSubjectVisitId");
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "LatestSubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("LatestSubjectVisitId");
+
+                    b.Navigation("FinalSubjectVisit");
+
+                    b.Navigation("LatestSubjectVisit");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestNew", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", null)
+                        .WithMany("TestNewList")
+                        .HasForeignKey("TrialImageDownloadId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
+                {
+                    b.Navigation("ChildList");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
+                {
+                    b.Navigation("SubejectVisitList");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", b =>
+                {
+                    b.Navigation("TestNewList");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911143331_testMaxLength.cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911143331_testMaxLength.cs
new file mode 100644
index 000000000..420938bec
--- /dev/null
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911143331_testMaxLength.cs
@@ -0,0 +1,111 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
+{
+    /// <inheritdoc />
+    public partial class testMaxLength : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "Name",
+                table: "Subject",
+                type: "nvarchar(200)",
+                maxLength: 200,
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "nvarchar(max)");
+
+            migrationBuilder.AlterColumn<string>(
+                name: "Code",
+                table: "Dictionary",
+                type: "nvarchar(200)",
+                maxLength: 200,
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "nvarchar(max)");
+
+            migrationBuilder.CreateTable(
+                name: "ReadModule",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    Name = table.Column<string>(type: "nvarchar(200)", maxLength: 200, nullable: false),
+                    CreateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    CreateTime = table.Column<DateTime>(type: "datetime2", nullable: false),
+                    UpdateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    UpdateTime = table.Column<DateTime>(type: "datetime2", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ReadModule", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "ReadingClinicalData",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    Code = table.Column<string>(type: "nvarchar(200)", maxLength: 200, nullable: false),
+                    ReadingId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    CreateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    CreateTime = table.Column<DateTime>(type: "datetime2", nullable: false),
+                    UpdateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    UpdateTime = table.Column<DateTime>(type: "datetime2", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ReadingClinicalData", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_ReadingClinicalData_ReadModule_ReadingId",
+                        column: x => x.ReadingId,
+                        principalTable: "ReadModule",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_ReadingClinicalData_SubejectVisit_ReadingId",
+                        column: x => x.ReadingId,
+                        principalTable: "SubejectVisit",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReadingClinicalData_ReadingId",
+                table: "ReadingClinicalData",
+                column: "ReadingId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "ReadingClinicalData");
+
+            migrationBuilder.DropTable(
+                name: "ReadModule");
+
+            migrationBuilder.AlterColumn<string>(
+                name: "Name",
+                table: "Subject",
+                type: "nvarchar(max)",
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "nvarchar(200)",
+                oldMaxLength: 200);
+
+            migrationBuilder.AlterColumn<string>(
+                name: "Code",
+                table: "Dictionary",
+                type: "nvarchar(max)",
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "nvarchar(200)",
+                oldMaxLength: 200);
+        }
+    }
+}
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911144206_teststr.Designer.cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911144206_teststr.Designer.cs
new file mode 100644
index 000000000..55e35c9f0
--- /dev/null
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911144206_teststr.Designer.cs
@@ -0,0 +1,394 @@
+// <auto-generated />
+using System;
+using IRaCIS.Core.Test.CodeFirstTest.MSSQL;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
+{
+    [DbContext(typeof(IRCContext))]
+    [Migration("20240911144206_teststr")]
+    partial class teststr
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.8")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Code")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<Guid?>("ConfigTypeId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid?>("ParentId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ConfigTypeId");
+
+                    b.HasIndex("ParentId");
+
+                    b.ToTable("Dictionary");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadModule", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("ReadModule");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadingClinicalData", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Code")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid>("ReadingId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ReadingId");
+
+                    b.ToTable("ReadingClinicalData");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid>("SubjectId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SubjectId");
+
+                    b.ToTable("SubejectVisit");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid?>("FinalSubjectVisitId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid?>("LatestSubjectVisitId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("FinalSubjectVisitId");
+
+                    b.HasIndex("LatestSubjectVisitId");
+
+                    b.ToTable("Subject");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestNew", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("TestName")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("nvarchar(100)");
+
+                    b.Property<Guid>("TrialImageDownloadId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("TrialImageDownloadId");
+
+                    b.ToTable("TestNew");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestStringLength", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("DefaultLength")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("UserDefineLength")
+                        .IsRequired()
+                        .HasMaxLength(300)
+                        .HasColumnType("nvarchar(300)");
+
+                    b.Property<string>("UserDefineText")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("TestStringLength");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime?>("DownloadEndTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<DateTime>("DownloadStartTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int>("ImageCount")
+                        .HasColumnType("int");
+
+                    b.Property<long>("ImageSize")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("ImageType")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsSuccess")
+                        .HasColumnType("bit");
+
+                    b.Property<Guid>("SubjectVisitId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("TrialImageDownload");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", "ConfigType")
+                        .WithMany()
+                        .HasForeignKey("ConfigTypeId");
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", "Parent")
+                        .WithMany("ChildList")
+                        .HasForeignKey("ParentId");
+
+                    b.Navigation("ConfigType");
+
+                    b.Navigation("Parent");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadingClinicalData", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadModule", "ReadModule")
+                        .WithMany()
+                        .HasForeignKey("ReadingId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "SubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("ReadingId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ReadModule");
+
+                    b.Navigation("SubjectVisit");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", "Subject")
+                        .WithMany("SubejectVisitList")
+                        .HasForeignKey("SubjectId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Subject");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "FinalSubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("FinalSubjectVisitId");
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "LatestSubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("LatestSubjectVisitId");
+
+                    b.Navigation("FinalSubjectVisit");
+
+                    b.Navigation("LatestSubjectVisit");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestNew", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", null)
+                        .WithMany("TestNewList")
+                        .HasForeignKey("TrialImageDownloadId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
+                {
+                    b.Navigation("ChildList");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
+                {
+                    b.Navigation("SubejectVisitList");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", b =>
+                {
+                    b.Navigation("TestNewList");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911144206_teststr.cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911144206_teststr.cs
new file mode 100644
index 000000000..f479cf60c
--- /dev/null
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911144206_teststr.cs
@@ -0,0 +1,40 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
+{
+    /// <inheritdoc />
+    public partial class teststr : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "TestStringLength",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    DefaultLength = table.Column<string>(type: "nvarchar(200)", maxLength: 200, nullable: false),
+                    UserDefineLength = table.Column<string>(type: "nvarchar(300)", maxLength: 300, nullable: false),
+                    UserDefineText = table.Column<string>(type: "text", maxLength: 200, nullable: false),
+                    CreateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    CreateTime = table.Column<DateTime>(type: "datetime2", nullable: false),
+                    UpdateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    UpdateTime = table.Column<DateTime>(type: "datetime2", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_TestStringLength", x => x.Id);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "TestStringLength");
+        }
+    }
+}
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911151956_RemoveForeignKeys.Designer.cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911151956_RemoveForeignKeys.Designer.cs
new file mode 100644
index 000000000..86afc5129
--- /dev/null
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911151956_RemoveForeignKeys.Designer.cs
@@ -0,0 +1,456 @@
+// <auto-generated />
+using System;
+using IRaCIS.Core.Test.CodeFirstTest.MSSQL;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
+{
+    [DbContext(typeof(IRCContext))]
+    [Migration("20240911151956_RemoveForeignKeys")]
+    partial class RemoveForeignKeys
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.8")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Code")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<Guid?>("ConfigTypeId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid?>("ParentId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ConfigTypeId");
+
+                    b.HasIndex("ParentId");
+
+                    b.ToTable("Dictionary");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Project", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Project");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ProjectUser", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid>("ProjectId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ProjectId");
+
+                    b.ToTable("ProjectUser");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadModule", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("ReadModule");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadingClinicalData", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Code")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid>("ReadingId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ReadingId");
+
+                    b.ToTable("ReadingClinicalData");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid>("SubjectId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SubjectId");
+
+                    b.ToTable("SubejectVisit");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid?>("FinalSubjectVisitId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid?>("LatestSubjectVisitId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("FinalSubjectVisitId");
+
+                    b.HasIndex("LatestSubjectVisitId");
+
+                    b.ToTable("Subject");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestNew", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("TestName")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("nvarchar(100)");
+
+                    b.Property<Guid>("TrialImageDownloadId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("TrialImageDownloadId");
+
+                    b.ToTable("TestNew");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestStringLength", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("DefaultLength")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("UserDefineLength")
+                        .IsRequired()
+                        .HasMaxLength(300)
+                        .HasColumnType("nvarchar(300)");
+
+                    b.Property<string>("UserDefineText")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("TestStringLength");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime?>("DownloadEndTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<DateTime>("DownloadStartTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int>("ImageCount")
+                        .HasColumnType("int");
+
+                    b.Property<long>("ImageSize")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("ImageType")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsSuccess")
+                        .HasColumnType("bit");
+
+                    b.Property<Guid>("SubjectVisitId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("TrialImageDownload");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", "ConfigType")
+                        .WithMany()
+                        .HasForeignKey("ConfigTypeId");
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", "Parent")
+                        .WithMany("ChildList")
+                        .HasForeignKey("ParentId");
+
+                    b.Navigation("ConfigType");
+
+                    b.Navigation("Parent");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ProjectUser", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Project", "Project")
+                        .WithMany()
+                        .HasForeignKey("ProjectId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Project");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadingClinicalData", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadModule", "ReadModule")
+                        .WithMany()
+                        .HasForeignKey("ReadingId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "SubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("ReadingId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ReadModule");
+
+                    b.Navigation("SubjectVisit");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", "Subject")
+                        .WithMany("SubejectVisitList")
+                        .HasForeignKey("SubjectId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Subject");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "FinalSubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("FinalSubjectVisitId");
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "LatestSubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("LatestSubjectVisitId");
+
+                    b.Navigation("FinalSubjectVisit");
+
+                    b.Navigation("LatestSubjectVisit");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestNew", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", null)
+                        .WithMany("TestNewList")
+                        .HasForeignKey("TrialImageDownloadId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
+                {
+                    b.Navigation("ChildList");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
+                {
+                    b.Navigation("SubejectVisitList");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", b =>
+                {
+                    b.Navigation("TestNewList");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911151956_RemoveForeignKeys.cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911151956_RemoveForeignKeys.cs
new file mode 100644
index 000000000..8a67fbd0e
--- /dev/null
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240911151956_RemoveForeignKeys.cs
@@ -0,0 +1,67 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
+{
+    /// <inheritdoc />
+    public partial class RemoveForeignKeys : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Project",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    CreateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    CreateTime = table.Column<DateTime>(type: "datetime2", nullable: false),
+                    UpdateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    UpdateTime = table.Column<DateTime>(type: "datetime2", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Project", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "ProjectUser",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    ProjectId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    CreateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    CreateTime = table.Column<DateTime>(type: "datetime2", nullable: false),
+                    UpdateUserId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    UpdateTime = table.Column<DateTime>(type: "datetime2", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ProjectUser", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_ProjectUser_Project_ProjectId",
+                        column: x => x.ProjectId,
+                        principalTable: "Project",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ProjectUser_ProjectId",
+                table: "ProjectUser",
+                column: "ProjectId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "ProjectUser");
+
+            migrationBuilder.DropTable(
+                name: "Project");
+        }
+    }
+}
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/IRCContextModelSnapshot.cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/IRCContextModelSnapshot.cs
index ffb12bafa..8a0151aca 100644
--- a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/IRCContextModelSnapshot.cs
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/IRCContextModelSnapshot.cs
@@ -25,11 +25,13 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
             modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
                 {
                     b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
                         .HasColumnType("uniqueidentifier");
 
                     b.Property<string>("Code")
                         .IsRequired()
-                        .HasColumnType("nvarchar(max)");
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
 
                     b.Property<Guid?>("ConfigTypeId")
                         .HasColumnType("uniqueidentifier");
@@ -55,12 +57,125 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
 
                     b.HasIndex("ParentId");
 
-                    b.ToTable("Dictionary", (string)null);
+                    b.ToTable("Dictionary");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Project", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Project");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ProjectUser", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid>("ProjectId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ProjectId");
+
+                    b.ToTable("ProjectUser");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadModule", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("ReadModule");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadingClinicalData", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("Code")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<Guid>("ReadingId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ReadingId");
+
+                    b.ToTable("ReadingClinicalData");
                 });
 
             modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", b =>
                 {
                     b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
                         .HasColumnType("uniqueidentifier");
 
                     b.Property<DateTime>("CreateTime")
@@ -82,12 +197,13 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
 
                     b.HasIndex("SubjectId");
 
-                    b.ToTable("SubejectVisit", (string)null);
+                    b.ToTable("SubejectVisit");
                 });
 
             modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", b =>
                 {
                     b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
                         .HasColumnType("uniqueidentifier");
 
                     b.Property<DateTime>("CreateTime")
@@ -104,7 +220,8 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
 
                     b.Property<string>("Name")
                         .IsRequired()
-                        .HasColumnType("nvarchar(max)");
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
 
                     b.Property<DateTime>("UpdateTime")
                         .HasColumnType("datetime2");
@@ -118,12 +235,13 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
 
                     b.HasIndex("LatestSubjectVisitId");
 
-                    b.ToTable("Subject", (string)null);
+                    b.ToTable("Subject");
                 });
 
             modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestNew", b =>
                 {
                     b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
                         .HasColumnType("uniqueidentifier");
 
                     b.Property<DateTime>("CreateTime")
@@ -150,12 +268,51 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
 
                     b.HasIndex("TrialImageDownloadId");
 
-                    b.ToTable("TestNew", (string)null);
+                    b.ToTable("TestNew");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TestStringLength", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("CreateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("DefaultLength")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("datetime2");
+
+                    b.Property<Guid>("UpdateUserId")
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("UserDefineLength")
+                        .IsRequired()
+                        .HasMaxLength(300)
+                        .HasColumnType("nvarchar(300)");
+
+                    b.Property<string>("UserDefineText")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("TestStringLength");
                 });
 
             modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.TrialImageDownload", b =>
                 {
                     b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
                         .HasColumnType("uniqueidentifier");
 
                     b.Property<DateTime>("CreateTime")
@@ -193,7 +350,7 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("TrialImageDownload", (string)null);
+                    b.ToTable("TrialImageDownload");
                 });
 
             modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Dictionary", b =>
@@ -211,6 +368,36 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
                     b.Navigation("Parent");
                 });
 
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ProjectUser", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Project", "Project")
+                        .WithMany()
+                        .HasForeignKey("ProjectId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Project");
+                });
+
+            modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadingClinicalData", b =>
+                {
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.ReadModule", "ReadModule")
+                        .WithMany()
+                        .HasForeignKey("ReadingId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", "SubjectVisit")
+                        .WithMany()
+                        .HasForeignKey("ReadingId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ReadModule");
+
+                    b.Navigation("SubjectVisit");
+                });
+
             modelBuilder.Entity("IRaCIS.Core.Test.CodeFirstTest.MSSQL.SubejectVisit", b =>
                 {
                     b.HasOne("IRaCIS.Core.Test.CodeFirstTest.MSSQL.Subject", "Subject")
diff --git a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/TrialImageDownload.cs b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/TrialImageDownload.cs
index 02eee8fe9..6410bc381 100644
--- a/IRaCIS.Core.Test/CodeFirstTest/MSSQL/TrialImageDownload.cs
+++ b/IRaCIS.Core.Test/CodeFirstTest/MSSQL/TrialImageDownload.cs
@@ -1,6 +1,4 @@
-using IRaCIS.Core.Domain.Models;
-using IRaCIS.Core.Domain.Share;
-using System;
+using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
@@ -10,6 +8,15 @@ using System.Threading.Tasks;
 
 namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL
 {
+    public abstract class BaseFullAuditEntity
+    {
+        [Key]
+        public Guid Id { get; set; }
+        public Guid CreateUserId { get; set; }
+        public DateTime CreateTime { get; set; }
+        public Guid UpdateUserId { get; set; }
+        public DateTime UpdateTime { get; set; }
+    }
 
     [Table("TrialImageDownload")]
     public class TrialImageDownload : BaseFullAuditEntity
@@ -126,6 +133,34 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL
     }
     #endregion
 
+    #region 测试 字符串默认长度配置
 
+    public class TestStringLength : BaseFullAuditEntity
+    {
+        public string DefaultLength { get; set; }
 
+        [MaxLength(300)]
+        public string UserDefineLength { get; set; }
+
+        [Column(TypeName = "text")]
+        public string UserDefineText { get; set; }
+
+    }
+    #endregion
+
+    #region 测试生成迁移移除外键约束
+
+    #endregion
+    public class Project : BaseFullAuditEntity
+    {
+
+    }
+
+    public class ProjectUser: BaseFullAuditEntity
+    {
+        //外键
+        public Guid ProjectId { get; set; }
+
+        public Project Project { get; set; }
+    }
 }