C# ef core 3:如何迁移Microsoft.EntityFrameworkCore.Design.Internal.CSharpHelper?
EF Core 3中缺少Microsoft.EntityFrameworkCore.Design.Internal.CSharpHelper 我使用它来支持sql server约束安装/卸载EF核心迁移C# ef core 3:如何迁移Microsoft.EntityFrameworkCore.Design.Internal.CSharpHelper?,c#,entity-framework-core,entity-framework-core-3.0,C#,Entity Framework Core,Entity Framework Core 3.0,EF Core 3中缺少Microsoft.EntityFrameworkCore.Design.Internal.CSharpHelper 我使用它来支持sql server约束安装/卸载EF核心迁移 public class MyCSharpHelper : CSharpHelper { public MyCSharpHelper (IRelationalTypeMappingSource relationalTypeMappingSource) : base(relationalT
public class MyCSharpHelper : CSharpHelper
{
public MyCSharpHelper (IRelationalTypeMappingSource relationalTypeMappingSource) : base(relationalTypeMappingSource)
{
}
public override string UnknownLiteral(object value)
{
if (value is MyConstraint[] constraints)
{
return ConstraintManager.ProcessConstraintLiteral(constraints);
}
return base.UnknownLiteral(value);
}
}
这在EF Core 3中应该是什么样子?Microsoft.EntityFrameworkCore.Design现在是一个开发依赖项包,这意味着它不会与您的应用程序一起部署,您也不能在代码中引用它
如果您需要自定义设计时服务,则必须在项目中编辑PackageReference,如下所述:AFAIK CSharpHelper仍然是一个公共类@Kexybique,但它未包含在Microsoft.EntityFrameworkCore.Design包中(并且没有新的Microsoft.EntityFrameworkCore.Design.Internal包):-(Microsoft.EntityFrameworkCore.Design中根本没有Microsoft.EntityFrameworkCore.Design.Internal命名空间