c# asp.net 身份和自定义角色

Question

我想我只是在做一些傻事。我首先使用代码 entity framework 和 asp.net 身份，我设置了一个自定义用户，如下所示：

public class User : IdentityUser, IKey<string>
{
    [MaxLength(100)] public string JobTitle { get; set; }
    [MaxLength(100)] public string Image { get; set; }
    [MaxLength(100)] public string FirstName { get; set; }
    [MaxLength(100)] public string LastName { get; set; }
}

然后我更新了我的 DbContext 以匹配：

protected override void OnModelCreating(ModelBuilder builder)
{
    base.OnModelCreating(builder);
    // Customize the ASP.NET Identity model and override the defaults if needed.
    // For example, you can rename the ASP.NET Identity table names and more.
    // Add your customizations after calling base.OnModelCreating(builder);

    builder.Entity<User>(m => m.ToTable("Users"));
    builder.Entity<IdentityRole>(m => m.ToTable("Roles"));
    builder.Entity<IdentityRoleClaim<string>>(m => m.ToTable("RoleClaims"));
    builder.Entity<IdentityUserClaim<string>>(m => m.ToTable("UserClaims"));
    builder.Entity<IdentityUserLogin<string>>(m => m.ToTable("UserLogins"));
    builder.Entity<IdentityUserRole<string>>(m => m.ToTable("UserRoles"));
    builder.Entity<IdentityUserToken<string>>(m => m.ToTable("UserTokens"));
}

一切正常，表已成功创建。现在我想对角色做同样的事情，除了这次我不需要额外的列（这里重要的是界面）所以我创建了一个新的 Role class:

public class Role: IdentityRole, IKey<string>
{
}

然后我将 OnModelCreating 方法更改为：

protected override void OnModelCreating(ModelBuilder builder)
{
    base.OnModelCreating(builder);
    // Customize the ASP.NET Identity model and override the defaults if needed.
    // For example, you can rename the ASP.NET Identity table names and more.
    // Add your customizations after calling base.OnModelCreating(builder);

    builder.Entity<User>(m => m.ToTable("Users"));
    builder.Entity<Role>(m => m.ToTable("Roles"));
    builder.Entity<IdentityRoleClaim<string>>(m => m.ToTable("RoleClaims"));
    builder.Entity<IdentityUserClaim<string>>(m => m.ToTable("UserClaims"));
    builder.Entity<IdentityUserLogin<string>>(m => m.ToTable("UserLogins"));
    builder.Entity<IdentityUserRole<string>>(m => m.ToTable("UserRoles"));
    builder.Entity<IdentityUserToken<string>>(m => m.ToTable("UserTokens"));
}

唯一更改的行是 builder.Entity<Role>(m => m.ToTable("Roles"));。当我运行 add-migration RoleChange 我期望自上次迁移以来没有任何变化，但我得到了这个错误：

The entity type 'Role' cannot be mapped to a table because it is derived from 'IdentityRole'. Only base entity types can be mapped to a table.

有谁知道为什么？我不明白为什么 User 有效，但 Role 不会....

这是完整的上下文：

public class DatabaseContext : IdentityDbContext<User>
{
    public DbSet<Claim> Claims { get; set; }

    /// <summary>
    /// For testing only
    /// </summary>
    public DatabaseContext()
    {

    }

    // ReSharper disable once SuggestBaseTypeForParameter
    public DatabaseContext(DbContextOptions<DatabaseContext> options)
        : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
        // Customize the ASP.NET Identity model and override the defaults if needed.
        // For example, you can rename the ASP.NET Identity table names and more.
        // Add your customizations after calling base.OnModelCreating(builder);

        builder.Entity<User>(m => m.ToTable("Users"));
        builder.Entity<Role>(m => m.ToTable("Roles"));
        builder.Entity<IdentityRoleClaim<string>>(m => m.ToTable("RoleClaims"));
        builder.Entity<IdentityUserClaim<string>>(m => m.ToTable("UserClaims"));
        builder.Entity<IdentityUserLogin<string>>(m => m.ToTable("UserLogins"));
        builder.Entity<IdentityUserRole<string>>(m => m.ToTable("UserRoles"));
        builder.Entity<IdentityUserToken<string>>(m => m.ToTable("UserTokens"));
    }
}

Answer 1

你做的是正确的，你只需要更新这一行

public class DatabaseContext : IdentityDbContext<User>

如下：

public class DatabaseContext : IdentityDbContext<User, Role, string>

c# asp.net 身份和自定义角色

c# asp.net identity and custom roles

c#

asp.net-identity

entity-framework-core

asp.net-core