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IRaCIS.Core.Test/CodeFirstTest/MSSQL/Convention/MigrationRemoveForeignKeysSqlGenerator .cs

@@ -1,30 +0,0 @@
-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;
-        }
-    }
-}

IRaCIS.Core.Test/CodeFirstTest/MSSQL/Convention/NoForeignKeyConvention.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore.Metadata.Conventions;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore;
+namespace IRaCIS.Core.Test
+{
+    /// <summary>
+    /// 这种方式不行
+    /// </summary>
+    public class NoForeignKeyConvention : IModelFinalizingConvention
+    {
+        public void ProcessModelFinalizing(IConventionModelBuilder modelBuilder, IConventionContext<IConventionModelBuilder> context)
+        {
+            foreach (var entityType in modelBuilder.Metadata.GetEntityTypes())
+            {
+                foreach (var foreignKey in entityType.GetForeignKeys())
+                {
+                    // 设置删除行为为 NoAction，避免生成外键约束
+                    foreignKey.Builder.OnDelete(DeleteBehavior.NoAction);
+                }
+            }
+        }
+    }
+}
+
+

IRaCIS.Core.Test/CodeFirstTest/MSSQL/Convention/NoForeignKeyMigrationsSqlGenerator.cs

@@ -0,0 +1,30 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Migrations.Operations;
+using Microsoft.EntityFrameworkCore.Metadata;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations.Internal;
+using Microsoft.EntityFrameworkCore.Storage;
+
+namespace IRaCIS.Core.Test
+{
+    public class NoForeignKeyMigrationsSqlGenerator : MigrationsSqlGenerator
+    {
+        public NoForeignKeyMigrationsSqlGenerator(
+            MigrationsSqlGeneratorDependencies dependencies) : base(dependencies)
+        {
+        }
+
+        protected override void Generate(MigrationOperation operation, IModel model, MigrationCommandListBuilder builder)
+        {
+            if (operation is AddForeignKeyOperation || operation is DropForeignKeyOperation)
+            {
+                // 跳过外键的生成
+                return;
+            }
+
+            base.Generate(operation, model, builder);
+        }
+    }
+
+}

IRaCIS.Core.Test/CodeFirstTest/MSSQL/IRCContext.cs

@@ -3,7 +3,6 @@ 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;
@@ -42,8 +41,9 @@ public partial class IRCContext : DbContext
 
     protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
     {
-        //移除外键约束
-        optionsBuilder.ReplaceService<IMigrationsSqlGenerator, MigrationRemoveForeignKeysSqlGenerator>();
+
+        // 替换默认的 MigrationsSqlGenerator
+        optionsBuilder.ReplaceService<IMigrationsSqlGenerator, NoForeignKeyMigrationsSqlGenerator>();
         optionsBuilder.UseSqlServer("Server=106.14.89.110,1433;Database=IRC_Code;User ID=sa;Password=mssql_KnTs2a;TrustServerCertificate=true");
 
 
@@ -59,12 +59,14 @@ 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());
     }

IRaCIS.Core.Test/CodeFirstTest/MSSQL/Migrations/20240912054434_RemoveForeignKey.Designer.cs

@@ -12,7 +12,7 @@ using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL.Migrations
 {
     [DbContext(typeof(IRCContext))]
-    [Migration("20240912012757_RemoveForeignKey")]
+    [Migration("20240912054434_RemoveForeignKey")]
     partial class RemoveForeignKey
     {
         /// <inheritdoc />

IRaCIS.Core.Test/CodeFirstTest/MSSQL/TrialImageDownload.cs

@@ -151,16 +151,21 @@ namespace IRaCIS.Core.Test.CodeFirstTest.MSSQL
     #region 测试生成迁移移除外键约束
 
     #endregion
+
+    #region 测试迁移不生成外键约束，ef知道外键关系，但是数据库不保存外键
     public class Project : BaseFullAuditEntity
     {
 
     }
 
-    public class ProjectUser: BaseFullAuditEntity
+    public class ProjectUser : BaseFullAuditEntity
     {
         //外键
         public Guid ProjectId { get; set; }
 
         public Project Project { get; set; }
     }
+    #endregion
+
+
 }