没有从ApplicationUser到IdentityUser的隐式引用转换 [英] There is no implicit reference conversion from ApplicationUser to IdentityUser

问题描述

我正在尝试自定义一些使用泛型的ASP.NET Identity Core类.

I am trying to customize some ASP.NET Identity Core classes which use Generics.

我的ApplicationUser类:

public class ApplicationUser : IdentityUser<Guid>//, ApplicationUserClaim, ApplicationRole, ApplicationUserLogin> 
{
    public ApplicationUser() {  }
}

我的ApplicationUserStore类:

public class ApplicationUserStore : UserStore<ApplicationUser, ApplicationRole, ApplicationDbContext, Guid> 
{
    public ApplicationUserStore(ApplicationDbContext ctx, IdentityErrorDescriber describer = null) : base(ctx, describer)
    {

    }
}

错误消息是:

'AspDotNetCoreFullFramework.Identity. ApplicationUser 1 [System.Guid]'， Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore`8 [TUser，TRole，TContext，TKey，TUserClaim，TUserRole，TUserLogin，TUserToken]'违反了类型参数"TUser"的约束

'AspDotNetCoreFullFramework.Identity.ApplicationUser1[System.Guid]', onMicrosoft.AspNetCore.Identity.EntityFrameworkCore.UserStore`8[TUser,TRole,TContext,TKey,TUserClaim,TUserRole,TUserLogin,TUserToken]' violates the constraint of type parameter 'TUser'

现在，当我转到UserStore的.NET实现(基类)时:

Now, when I go to the .NET implementation of UserStore (Base class):

公共类UserStore< TUser，TRole，TContext，TKey>:UserStore< TUser，TRole，TContext，TKey，IdentityUserClaim< TKey>，IdentityUserRole< TKey> ;、IdentityUserLogin< TKey>，IdentityUserToken< TKey>>
其中TUser:IdentityUser< TKey>
...其中TKey:IEquatable< TKey> {

我可以看到ApplicationUser继承自IdentityUser< GUID>.满足此约束.TKey是实现IEquatable GUID的GUID.这个约束也得到满足.

I can see that ApplicationUser inherits from IdentityUser<GUID>. This constraint is fulfilled. TKey is GUID which implements IEquatable<GUID>. This constraint is also fulfilled.

那是什么问题?

推荐答案

将GUID添加到

IdentityBuilder.AddEntityFrameworkStores<ApplicationDbContext,Guid>();

如帖子中所述

解决了该问题.

as mentioned in this post solved the problem.

这篇关于没有从ApplicationUser到IdentityUser的隐式引用转换的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！