【发布时间】：2013-04-25 14:18:17
【问题描述】：
我有一个场景，我需要在不使用 ASP.NET 成员资格的情况下手动将用户、角色和 UsersInRoles 条目插入数据库。现在，当我尝试插入多对多关系 UsersInRoles 时，我得到以下异常
Invalid column name 'Role_RoleId'.
我正在使用 EF 5，即 POCO 的数据库优先方法。我已经在 EDMX 中定义了一个关联，所以应该没问题...这里是模型实体
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataContract(IsReference = true)]
[KnownType(typeof(User))]
public partial class User : IUser
{
#region Primitive Properties
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataMember]
public virtual System.Guid ApplicationId
{
get;
set;
}
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataMember]
public virtual System.Guid UserId
{
get;
set;
}
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataMember]
public virtual string UserName
{
get;
set;
}
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataMember]
public virtual bool IsAnonymous
{
get;
set;
}
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataMember]
public virtual System.DateTime LastActivityDate
{
get;
set;
}
#endregion
#region Navigation Properties
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[NotMapped]
public virtual IMembership Membership
{
get { return _membership; }
set
{
if (!ReferenceEquals(_membership, value))
{
var previousValue = _membership;
_membership = value;
FixupMembership(previousValue);
}
}
}
private IMembership _membership;
/// <summary>
/// Gets or sets the roles associated with an user
/// </summary>
[DataMember]
public virtual ICollection<Role> Roles
{
get
{
if (_roles == null)
{
_roles = new FixupCollection<Role>();
}
return _roles;
}
set
{
_roles = value;
}
}
private ICollection<Role> _roles;
#endregion
#region Association Fixup
private void FixupMembership(IMembership previousValue)
{
if (previousValue != null && ReferenceEquals(previousValue.User, this))
{
previousValue.User = null;
}
if (Membership != null)
{
Membership.User = this;
}
}
#endregion
}
注意：这是从用户到角色的单向关系
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataContract]
[KnownType(typeof(Role))]
public partial class Role : IRole
{
#region Primitive Properties
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataMember]
public virtual System.Guid ApplicationId
{
get;
set;
}
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataMember]
public virtual System.Guid RoleId
{
get;
set;
}
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataMember]
public virtual string RoleName
{
get;
set;
}
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[DataMember]
public virtual string Description
{
get;
set;
}
#endregion
}
工作代码
MyContext context = new MyContext();
Role usersRole = new Role();
usersRole.RoleName = "Users";
usersRole.Description = "User Role";
usersRole.RoleId = GuidExtension.NewSequentialGuid();
usersRole.ApplicationId = application.Id;
//Init users
User adminUser = new User();
adminUser.UserName = "admin";
adminUser.IsAnonymous = false;
adminUser.LastActivityDate = DateTime.UtcNow;
adminUser.UserId = GuidExtension.NewSequentialGuid();
adminUser.ApplicationId = application.Id;
//Init user roles
adminUser.Roles.Add(usersRole);
context.User.Add(adminUser);
context.SaveChanges();
我也尝试过先将角色添加到数据库，然后添加一个用户（没有将角色添加到角色集合），我得到了同样的异常。然后我通过 Fluent API 添加了模型绑定，如下所示：
modelBuilder.Entity<User>()
.HasMany(u => u.Roles)
.WithMany()
.Map(m =>
{
m.MapLeftKey("UserId");
m.MapRightKey("RoleId");
m.ToTable("UsersInRoles");
});
我也尝试像这样添加绑定：
modelBuilder.Entity<User>()
.HasMany(u => u.Roles)
.WithMany()
.Map(m =>
{
m.MapLeftKey("UserId");
m.MapRightKey("RoleId");
var mapping = m.ToTable("UsersInRoles");
mapping.MapLeftKey("UserId");
mapping.MapRightKey("RoleId");
});
还有上面代码的 SQL Trace
exec sp_executesql N'insert [dbo].[Roles]([RoleId], [ApplicationId], [RoleName], [Description])
values (@0, @1, @2, @3)
',N'@0 uniqueidentifier,@1 uniqueidentifier,@2 nvarchar(max) ,@3 nvarchar(max) ',@0='46E39982-E490-4F79-B457-A1AB012948CE',@1='79D75E2D-9923-48DC-A4D6-AE0CED0EDD58',@2=N'Users',@3=N'User Role'
exec sp_executesql N'insert [dbo].[Users]([UserId], [ApplicationId], [UserName], [IsAnonymous], [LastActivityDate], [Role_RoleId])
values (@0, @1, @2, @3, @4, null)
',N'@0 uniqueidentifier,@1 uniqueidentifier,@2 nvarchar(max) ,@3 bit,@4 datetime2(7)',@0='B5EA5052-71C9-411E-91C7-A1AB012948CF',@1='79D75E2D-9923-48DC-A4D6-AE0CED0EDD58',@2=N'admin',@3=0,@4='2013-04-25 14:14:08.4930381'
您可以在上面看到问题的根源，用户插入 SQL 中的 [Role_RoleId] 列，所以我不确定我是否正确设置了导航属性？
无论我做什么，都会忽略上述异常，例如 Fluent API 绑定。有谁知道如何正确地将多对多条目添加到 UsersInRoles 表中，或者我的代码中缺少什么。
注意：我是 EF 新手，所以任何信息都会有所帮助。
更新 我试图只将用户条目保存到数据库中，但我得到了相同的 [Role_RoleId] 异常，希望这能进一步澄清这个问题，因为这可能不是多对多插入问题而是无效的多对多配置问题？
问候
【问题讨论】：
标签： entity-framework asp.net-membership entity-framework-5 fluent-interface