5
嗨我试图为用户和角色之间的多对多关系设置实体框架。实体框架用户角色多对多关系
下图显示了在数据库:
用户的型号是:
public class User : IEntity
{
public virtual int UserId { get; set; }
[Column(TypeName = "varchar")]
[StringLength(100)]
public virtual string UserName { get; set; }
[Column(TypeName = "varchar")]
[StringLength(100)]
public virtual string FirstName { get; set; }
[Column(TypeName = "varchar")]
[StringLength(100)]
public virtual string LastName { get; set; }
[Column(TypeName = "varchar")]
[StringLength(200)]
public virtual string EmailAddress { get; set; }
public int AreaId { get; set; }
[Column(TypeName = "varchar")]
[StringLength(64)]
public string CreatedByUserName { get; set; }
public DateTime CreatedDateTime { get; set; }
[Column(TypeName = "varchar")]
[StringLength(64)]
public string LastModifiedByUserName { get; set; }
public DateTime? LastModifiedDateTime { get; set; }
//Navigation properties
//public virtual Role Role { get; set; }
public virtual Area Area { get; set; }
public virtual ICollection<Role> Roles { get; set; }
}
的榜样是:
public class Role : IEntity
{
public int RoleId { get; set; }
[Column(TypeName = "varchar")]
[StringLength(100)]
public string Name { get; set; }
[Column(TypeName = "varchar")]
[StringLength(1000)]
public string Description { get; set; }
[Column(TypeName = "varchar")]
[StringLength(64)]
public string CreatedByUserName { get; set; }
public DateTime CreatedDateTime { get; set; }
[Column(TypeName = "varchar")]
[StringLength(64)]
public string LastModifiedByUserName { get; set; }
public DateTime? LastModifiedDateTime { get; set; }
//Navigation Properties
public ICollection<User> Users { get; set; }
}
UserRole的是:
public class UserRole
{
public int UserId { get; set; }
public int RoleId { get; set; }
//Navigation properties
public virtual User User { get; set; }
public virtual Role Role { get; set; }
}
所以我想我有这个成立了罚款,但在我的代码,我去类似:
var roles = from r in user.Roles
select r.Name;
,并拍摄本身给人的错误:
Server Error in '/' Application.
Invalid object name 'dbo.RoleUser'.
,所以我增加了以下上下文:的
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<User>()
.HasMany(i => i.Roles)
.WithMany(u => u.Users);
}
但是现在我得到错误:
'/'应用程序中的服务器错误。 列名称'Role_RoleId'无效。 列名'User_UserId'无效。
所以当然,我没有在这里正确设置的东西。我的身体可以指向正确的方向吗?
角色实体如何不知道用户实体?如何编写配置代码? –