Question

我在VS2015中创建了一个应用程序（使用Identity 2.2）和示例应用程序（MVC，mvc个人身份验证），我根据教程修改了一些自定义字段添加到users表（使用迁移来获取添加的字段）进入数据库）。然后对于其余的表（非标识的）我使用EntityFramework数据库 - 首先生成CRUD控制器＆amp;观点等到目前为止一切顺利，一切似乎都很好。

现在我正在尝试修改它，以便Identity表的键是整数而不是GUID。我已经按照本教程（使用MVC更新3）， https://docs.microsoft.com/en-us/aspnet/identity/overview/extensibility/change-primary-key-for-users-in-aspnet-identity#context

但是在完成教程之后，当我构建并运行解决方案时，我在尝试生成模型时遇到此错误

One or more validation errors were detected during model generation:
Proyecto.Models.IdentityUserRole: : EntityType 'IdentityUserRole' has no key defined. Define the key for this EntityType.
IdentityUserRoles: EntityType: EntitySet 'IdentityUserRoles' is based on type 'IdentityUserRole' that has no keys defined.

我不知道如何修复它...感谢任何帮助。

my Models / IdentityModels.cs：

public class ApplicationUser : IdentityUser<int, CustomUserLogin, CustomUserRole, CustomUserClaim>

{
    //added custom fields
    [Column(TypeName = "varchar")]
    [StringLength(50)]
    public string Nombre { get; set; }
    public DateTime FechaAlta { get; set; }
    public DateTime? FechaUltModif { get; set; }
    public bool Activo { get; set; }
    public string Notas { get; set; }

    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser, int> manager)
    {
        // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        // Add custom user claims here
        return userIdentity;
    }
}

public class ApplicationDbContext : IdentityDbContext<ApplicationUser, CustomRole, int, CustomUserLogin, CustomUserRole, CustomUserClaim>
{
    public ApplicationDbContext()
        : base("DefaultConnection")
    {
    }

    public static ApplicationDbContext Create()
    {
        return new ApplicationDbContext();
    }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);
        //to fix some conflicts using mysql
        modelBuilder.Entity<ApplicationUser>().Property(u => u.UserName).HasMaxLength(255);
        modelBuilder.Entity<ApplicationUser>().Property(u => u.Email).HasMaxLength(255);
        modelBuilder.Entity<IdentityRole>().Property(r => r.Name).HasMaxLength(255);
    }

}


//aded for int keys
public class CustomUserRole : IdentityUserRole<int> { }
public class CustomUserClaim : IdentityUserClaim<int> { }
public class CustomUserLogin : IdentityUserLogin<int> { }
public class CustomRole : IdentityRole<int, CustomUserRole>
{
    public CustomRole() { }
    public CustomRole(string name) { Name = name; }
}
public class CustomUserStore : UserStore<ApplicationUser, CustomRole, int,
    CustomUserLogin, CustomUserRole, CustomUserClaim>
{
    public CustomUserStore(ApplicationDbContext context)
        : base(context)
    {
    }
}
public class CustomRoleStore : RoleStore<CustomRole, int, CustomUserRole>
{
    public CustomRoleStore(ApplicationDbContext context)
        : base(context)
    {
    }
}

Answer 1

以下是您的问题：

protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
       //your problem is in this line change IdentityRole  to CustomRole 
        modelBuilder.Entity<IdentityRole>().Property(r => r.Name).HasMaxLength(255);
    }

使用CustomRole代替IdentityRole ，因为IdentityRole使用字符串主键定义，而CustomUserRole使用int < / p>

如果你去定义IdentityRole，你会发现它的扩展IdentityRole<string, IdentityUserRole>以及你收到错误的原因

Currected Code：

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);
    //to fix some conflicts using mysql
    modelBuilder.Entity<ApplicationUser>().Property(u => u.UserName).HasMaxLength(255);
    modelBuilder.Entity<ApplicationUser>().Property(u => u.Email).HasMaxLength(255);
    modelBuilder.Entity<CustomRole>().Property(r => r.Name).HasMaxLength(255);
}

.net Identity：尝试将字符串（GUID？）键更改为int时出错

1 个答案: