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增加codefirst迁移配置
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This commit is contained in:
hang
2024-09-17 14:26:12 +08:00
parent 5990477fdc
commit ab68a63bdd
20 changed files with 928 additions and 1006 deletions
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IRaCIS.Core.Test/CodeFirstTest/CodeFirst使用说明
+1 -1
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@@ -20,7 +20,7 @@ https://www.cnblogs.com/cqpanda/p/16815263.html
5、撤销某次更新到数据库的迁移（自动执行down 方法）
dotnet ef database update 某次迁移的前一次迁移名称 -p IRaCIS.Core.Test -c IRCContext
dotnet ef migrations add RemoveForeignKey -p IRaCIS.Core.Test -c IRCContext -o CodeFirstTest/MSSQL/Migrations
dotnet ef migrations add RemoveForeignKey -p IRaCIS.Core.Test -c IRCContext -o CodeFirstTest/MSSQL/Migrations
IRaCIS.Core.Test/CodeFirstTest/PGSQL/Convention/MaxStringLengthConvention .cs
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@@ -11,6 +11,12 @@ namespace IRaCIS.Core.Test.CodeFirstTest.PGSQL.Migrations
/// </summary>
public class MaxStringLengthConvention : IModelFinalizingConvention
{
private readonly int _defaultLenth;
public MaxStringLengthConvention(int defaultLenth)
{
_defaultLenth = defaultLenth;
}
public void ProcessModelFinalizing(IConventionModelBuilder modelBuilder, IConventionContext<IConventionModelBuilder> context)
{
foreach (var property in modelBuilder.Metadata.GetEntityTypes()
@@ -31,17 +37,17 @@ namespace IRaCIS.Core.Test.CodeFirstTest.PGSQL.Migrations
// 输出调试信息，看看是哪种特性生效
if (stringLengthAttribute != null)
{
Console.WriteLine($"{property.Name}: StringLength({stringLengthAttribute.MaximumLength})");
//Console.WriteLine($"{property.Name}: StringLength({stringLengthAttribute.MaximumLength})");
property.Builder.HasMaxLength(stringLengthAttribute.MaximumLength);
}
else if (maxLengthAttribute != null)
{
Console.WriteLine($"{property.Name}: MaxLength (no specific length, allowing max)");
//Console.WriteLine($"{property.Name}: MaxLength (no specific length, allowing max)");
}
else
{
Console.WriteLine($"{property.Name}: Default length 200");
property.Builder.HasMaxLength(200);
//Console.WriteLine($"{property.Name}: Default length {_defaultLenth}");
property.Builder.HasMaxLength(_defaultLenth);
}
}
}
IRaCIS.Core.Test/CodeFirstTest/PGSQL/PGContext.cs
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@@ -70,7 +70,7 @@ public partial class PGContext : DbContext
//configurationBuilder.Conventions.Add(_ => new NoForeignKeyConvention());
//针对字符串使用默认的长度配置
configurationBuilder.Conventions.Add(_ => new MaxStringLengthConvention());
configurationBuilder.Conventions.Add(_ => new MaxStringLengthConvention(200));
}
partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
IRaCIS.Core.Test/IRaCIS.Core.Test.csproj
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@@ -52,16 +52,11 @@
<PackageReference Include="Fluid.Core" Version="2.11.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.8" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Abstractions" Version="8.0.8" />
<PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.4" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.8">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.8" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="8.0.8">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.4" />
</ItemGroup>
<ItemGroup>
IRaCIS.Core.Test/模板使用说明
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@@ -17,7 +17,7 @@
-c 指定数据库上下文名字
-d 使用数据注解 不指定，默认是fluentAPI
-t 指定要生成的表名
-p 指定项目名字
-p 指定项目名字 （包含上下文，并且产生迁移文件的项目）
备注： 因为是从数据库反向生成实体，所以会默认生成dbcontext ,每次生成想要的实体后，删除指定的名称context即可
针对字符串类型，我们避免string字段 数据库存储null string? 数据库才存储null（除非有合理的理由），这样可以避免代码里面用string 变量，总是要判断是否为null