后期表索引类型更改，同时不影响之前的表

IRaCIS.Core.Application/TestService.cs

@@ -12,6 +12,7 @@ using IRaCIS.Core.Domain;
 using IRaCIS.Core.Domain.Models;
 using IRaCIS.Core.Domain.Share;
 using IRaCIS.Core.Infra.EFCore;
+using IRaCIS.Core.Infra.EFCore.Context;
 using IRaCIS.Core.Infrastructure;
 using IRaCIS.Core.Infrastructure.Encryption;
 using IRaCIS.Core.Infrastructure.NewtonsoftJson;
@@ -75,6 +76,25 @@ namespace IRaCIS.Core.Application.Service
     {
         public static int IntValue = 100;
 
+
+        [AllowAnonymous]
+
+        public async Task<IResponseOutput> CreatNewDBStruct()
+        {
+            var factory = new IRaCISDBContextFactory();
+
+            using var db = factory.CreateDbContext(Array.Empty<string>());
+
+            // ⚠️ 临时用，确认是测试库
+            // db.Database.EnsureDeleted();
+
+            db.Database.EnsureCreated();
+
+            Console.WriteLine("数据库结构已创建完成");
+
+            return ResponseOutput.Ok();
+        }
+
         [AllowAnonymous]
         public async Task<IResponseOutput> TestOSS(StorageClass storageClass)
         {

IRaCIS.Core.Infra.EFCore/CodeFirst使用说明

@@ -53,3 +53,6 @@
 5、以下命令将生成一个从指定 from 迁移到指定 to 迁移的 SQL 脚本。
 
     dotnet ef migrations script  from  to  -p IRaCIS.Core.Infra.EFCore 
+
+6、查看迁移列表
+dotnet ef migrations list -p IRaCIS.Core.Infra.EFCore 

IRaCIS.Core.Infra.EFCore/Context/IRaCISDBContext.cs

@@ -6,6 +6,7 @@ using IRaCIS.Core.Infrastructure.Extention;
 using Microsoft.EntityFrameworkCore.Metadata.Conventions;
 using Microsoft.EntityFrameworkCore.Metadata.Internal;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Microsoft.VisualBasic;
 using Newtonsoft.Json;
 using System.ComponentModel;
 using System.ComponentModel.DataAnnotations;
@@ -60,8 +61,13 @@ public class IRaCISDBContext : DbContext
         //针对字符串使用默认的长度配置为200，如果标注了StringLength 其他长度，就是标注的长度，如果标注了MaxLength 那么就是nvarcharMax
         configurationBuilder.Conventions.Add(_ => new DefaultStringLengthConvention(400));
 
+        //configurationBuilder.Conventions.Add(_ => new RemoveForeignKeyConvention());
+
+        //控制外键索引生成与否 
         //https://learn.microsoft.com/zh-cn/ef/core/modeling/relationships/conventions?utm_source=chatgpt.com
-        //configurationBuilder.Conventions.Remove(typeof(ForeignKeyIndexConvention));
+        configurationBuilder.Conventions.Remove(typeof(ForeignKeyIndexConvention));
+
+   
     }
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
@@ -116,6 +122,7 @@ public class IRaCISDBContext : DbContext
 
 
         #region decimal 自定义精度，适配多种数据库
+
         foreach (var entityType in modelBuilder.Model.GetEntityTypes())
         {
             foreach (var property in entityType.GetProperties())
@@ -142,6 +149,12 @@ public class IRaCISDBContext : DbContext
             }
         }
 
+        //用户名区分大小写
+        modelBuilder.Entity<IdentityUser>(entity =>
+        {
+            entity.Property(e => e.UserName)
+              .UseCollation("Chinese_PRC_CS_AS");
+        });
         #endregion
 
         //遍历实体模型手动配置
@@ -160,6 +173,26 @@ public class IRaCISDBContext : DbContext
 
         foreach (var entityType in modelBuilder.Model.GetEntityTypes())
         {
+            #region 修改Id 聚集索引-> Id非聚集，CreateTime聚集索引，方便分区
+
+            // 1️ 所有 Entity：Id 为主键（非聚集）
+            if (typeof(Entity).IsAssignableFrom(entityType.ClrType))
+            {
+                modelBuilder.Entity(entityType.ClrType)
+                    .HasKey(nameof(Entity.Id))
+                    .IsClustered(false); 
+            }
+
+            // 2️ 所有 IAuditAdd：CreateTime 为聚集索引
+            if (typeof(IAuditAdd).IsAssignableFrom(entityType.ClrType))
+            {
+                modelBuilder.Entity(entityType.ClrType)
+                    .HasIndex(nameof(IAuditAdd.CreateTime))
+                    .IsClustered(); 
+            }
+
+            #endregion
+
             // 软删除配置
             if (typeof(ISoftDelete).IsAssignableFrom(entityType.ClrType))
             {