实体框架5 - 将数据插入UsersInRoles多对多表

时间:2013-04-25 14:18:18

标签: entity-framework asp.net-membership entity-framework-5 fluent-interface

我有一个场景需要手动插入用户,角色& UsersInRoles条目在不使用ASP.NET成员资格的情况下进入数据库。现在当我尝试插入多对多关系的UsersInRoles时,我得到以下异常

Invalid column name 'Role_RoleId'.

我正在使用EF 5,数据库第一种方法与POCO。我在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();

我还尝试首先将Role添加到数据库,然后添加User(没有添加Role to Roles集合),我得到了相同的异常。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");
              });

我还尝试添加这样的绑定:

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");
          });

此处还有上述代码的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'

上面你可以看到问题的根源,用户插入SQL中的 [Role_RoleId] 列,所以我不确定我是否正确设置导航属性?

无论我做什么,我都会得到上述异常,例如Fluent API绑定只会被忽略。有没有人知道如何在UsersInRoles表中正确添加多个条目或我在代码中缺少的内容。

注意:我是EF的新手,所以任何信息都会有所帮助。

更新 我试图只将User条目保存到数据库中,并且我得到相同的 [Role_RoleId] 异常,希望这会更多地澄清这个问题,因为这可能不是一个多对多的插入问题但是很多配置问题无效?

此致

1 个答案:

答案 0 :(得分:0)

我在我的代码中发现了两个问题,经过长时间的代码审查后,第一个问题是我的一个名为

的部分类中的“隐藏”属性
public virtual ICollection<User> Members { get; set; }

它存在复制粘贴错误,我无法找到它,因为它处于折叠区域,我正在查找Users属性,因为这是我之前生成的导航项的名称。

第二个问题是一个更严重的问题,它与“Database.SetInitializer”有关,db初始化程序已经放入

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
  Database.SetInitializer<CoreDALContext>(null);
}

这是错误的,应该只调用一次,并按照Microsoft实现放入静态构造函数。

static CoreDALContext()
{
  Database.SetInitializer<CoreDALContext>(null);
}

我希望这会帮助其他EF新人不要犯同样的错误。

问候