entity-framework - EF6 以错误的顺序放置插入参数

Question

我正在首先将 EF6 EDMX 工作转换为 EF6 代码，主要使用通过 Visual Studio -> 添加项目 -> Ado.net 模型生成的现有数据库结构。

我有以下 CF 实体：

[Table("Account")]
public class Account
{
    [Key]
    public int AccountID { get; set; }

    public virtual ICollection<Message> Messages { get; set; }
    public virtual ICollection<MessageUser> MessageUsers { get; set; }

    internal static void ConfigureModel(System.Data.Entity.DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Account>()
            .HasMany(e => e.Messages)
            .WithRequired(e => e.Account)
            .WillCascadeOnDelete(false);

        modelBuilder.Entity<Account>()
            .HasMany(e => e.MessageUsers)
            .WithRequired(e => e.Account)
            .WillCascadeOnDelete(false);
    }
}

[Table("Message")]
public class Message
{
    [Key]
    [Column(Order = 0)]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int MessageID { get; set; }

    [Key]
    [Column(Order = 1)]
    [DatabaseGenerated(DatabaseGeneratedOption.None)]
    public int AccountID { get; set; }

    public virtual Account Account { get; set; }
    public virtual ICollection<MessageUser> MessageUsers { get; set; }

    internal static void ConfigureModel(System.Data.Entity.DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Message>()
            .HasMany(e => e.MessageUsers)
            .WithRequired(e => e.Message)
            .HasForeignKey(e => new { e.AccountID, e.MessageID })
            .WillCascadeOnDelete(false);
    }
}

[Table("MessageUser")]
public class MessageUser
{
    [Key]
    [Column(Order = 0)]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int MessageUserID { get; set; }

    [Key]
    [Column(Order = 1)]
    public int AccountID { get; set; }

    public int MessageID { get; set; }

    public virtual Account Account { get; set; }

    public virtual Message Message { get; set; }
}

在我的代码中，我通过以下方式将用户添加到消息中：

        var messageUsers = new List<MessageUser>();
        foreach (var userId in usersInvolved)
        {
            var container = MessageContainer.INBOX;
            if (userId == _serviceContext.UserID)
            {
                container = messageModel.UserIDs.Contains(userId)
                    ? MessageContainer.INBOXANDSENT
                    : MessageContainer.SENT;
            }

            messageUsers.Add(new MessageUser
            {
                Message =  message,
                UserDetailID = userId,
                ParentMessageID = messageModel.ParentMessageID,
                LastUpdatedBy = _serviceContext.UserID,
                LastUpdatedOn = time,
                AccountID = _serviceContext.AccountID,
                Container = container
            });
        }

        DBContext.Message.Add(message);
        DBContext.MessageUser.AddRange(messageUsers);
        DBContext.SaveChanges();

这会导致消息用户和帐户之间的外键 sql 异常。当我加载 sql profiler 时，正在生成的插入语句是

exec sp_executesql N'INSERT [dbo].[MessageUser]([AccountID], [MessageID], [UserDetailID], [ProfileID], [ParentMessageID], [IsRead], [IsTrashed], [LastUpdatedBy], [LastUpdatedOn], [Container])
VALUES (@0, @1, @2, NULL, NULL, @3, @4, @5, @6, @7)
SELECT [MessageUserID], [RowVersionStamp]
FROM [dbo].[MessageUser]
WHERE @@ROWCOUNT > 0 AND [MessageUserID] = scope_identity() AND [AccountID] = @0',N'@0 int,@1 int,@2 int,@3 bit,@4 bit,@5 int,@6 datetime2(7),@7 varchar(20)',@0=17293,@1=10015,@2=10092,@3=0,@4=0,@5=11346,@6='2018-10-31 13:44:41.2743099',@7='Inbox'

问题17293在于消息 ID 和10015帐户 ID。EF6 以错误的顺序放置这些参数，因此由于 FK 约束而失败。这非常令人担忧，因为我无法确定其他插入是否正常工作或意外工作但存储数据错误。

这是我的错误吗？

标签： entity-frameworkentity-framework-6