C＃asp.net身份和自定义角色

本文介绍了C＃asp身份和自定义角色的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我认为我在这里做些愚蠢的事情。 我使用了具有asp身份的代码优先实体框架，并建立了这样的自定义用户：

公共类User： IdentityUser，IKey< string> { [MaxLength（100）]公共字符串JobTitle {get;组; } [MaxLength（100）]公共字符串Image {get;组; } [MaxLength（100）]公共字符串FirstName {get;组; } [MaxLength（100）]公共字符串LastName {get;组; } }

然后我将 DbContext 更新为匹配：

受保护的覆盖无效OnModelCreating（ModelBuilder builder） { base.OnModelCreating（builder）; //自定义ASP.NET身份模型，并在需要时覆盖默认值。 //例如，您可以重命名ASP.NET标识表名称和更多名称。 //调用base.OnModelCreating（builder）;后添加自定义项 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）））； }

所有工作正常，并且表已成功创建。 现在我想对角色做同样的事情，除了这次我不需要多余的列（在这里重要的是界面），所以我创建了一个新的 Role 类：

公共类作用：IdentityRole，IKey< string> {}

然后我更改了 OnModelCreating 方法：

受保护的覆盖无效OnModelCreating（ModelBuilder builder） { base.OnModelCreating（builder） ; //自定义ASP.NET身份模型，并在需要时覆盖默认值。 //例如，您可以重命名ASP.NET标识表名称和更多名称。 //调用base.OnModelCreating（builder）;后添加自定义项 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 时，我期望自上次迁移以来没有任何变化，但我却收到此错误：

实体类型'Role'不能映射到表，因为它是从'IdentityRole'派生的。只有基本实体类型可以映射到表。

有人知道为什么吗？ 我不明白为什么 User 可以工作，但是 Role 不会。 p>

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这里是完整上下文：

公共类DatabaseContext：IdentityDbContext< User> ; { public DbSet< Claim>要求{组; } ///< summary> ///仅用于测试 ///< / summary> public DatabaseContext（） { } // ReSharper禁用一次ModifySimpleBaseTypeForParameter public DatabaseContext（DbContextOptions< DatabaseContext> options）：base（options） {} 受保护的覆盖无效OnModelCreating（ModelBuilder builder） { base.OnModelCreating（builder）; //自定义ASP.NET身份模型，并在需要时覆盖默认值。 //例如，您可以重命名ASP.NET标识表名称和更多名称。 //调用base.OnModelCreating（builder）;后添加自定义项 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）））； } }

解决方案

您所做的操作是正确的，只需更新此行

公共类DatabaseContext：IdentityDbContext< User>

如下：

公共类DatabaseContext：IdentityDbContext<用户，角色，字符串>

I think I am just doing something silly here. I have used code first entity framework with asp identity and I set up a custom user like this:

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; } }

then I updated my DbContext to match:

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")); }

All works, and the tables were created successfully. Now I want to do the same for roles, except this time I don't need extra columns (it's the interface that is important here) so I create a new Role class:

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

I then changed my OnModelCreating method to this:

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")); }

The only line that changed was builder.Entity<Role>(m => m.ToTable("Roles"));. When I run add-migration RoleChange I expected nothing to have changed since my last migration, but instead I get this error:

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.

Does anyone know why? I don't understand why User works, but Role won't....

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Here is the full context:

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")); } }

解决方案

What you have done is correct, you just need to update this line

public class DatabaseContext : IdentityDbContext<User>

as below :

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