实体框架:“无效的列名称”错误,包含多对多映射

时间:2013-10-18 12:08:47

标签: sql entity-framework

我有一个数据库,我试图在Entity Framework中实现。其中两个表有多对多的关系,似乎实体框架正在尝试创建一个不存在的列名。它坚持认为:

  

无效的列名称'Shipment_Id'。

但是,我的代码或数据库中没有任何一个列。这两个表是Allocation和Shipment,由ShipmentAllocation联合。

以下是配置: 分配:

public AllocationConfiguration()
    {
        this.Property(x => x.Id).HasColumnName("AllocationId");
        this.HasKey(x => x.Id);

        this.Property(x => x.FulfillmentCenter).HasMaxLength(50);
        this.Property(x => x.DateCreated);
        this.Property(x => x.DateModified);
        this.Property(x => x.ModifiedBy).HasMaxLength(50);

        HasMany(x => x.OrderItems)
            .WithOptional(x => x.Allocation)
            .Map(x => x.MapKey("AllocationId"));

        this.HasMany(a => a.Shipments)
            .WithMany()
            .Map(x =>
                {
                    x.MapLeftKey("AllocationId");
                    x.MapRightKey("ShipmentId");
                    x.ToTable("ShipmentAllocation");
                });

    }

配送费:

/// <summary>
    /// Initializes a new instance of the <see cref="ShipmentConfiguration"/> class.
    /// </summary>
    public ShipmentConfiguration()
    {
        this.Property(x => x.Id).HasColumnName("ShipmentId");
        this.HasKey(x => x.Id);

        this.Property(x => x.DateCreated);
        this.Property(x => x.DateModified);
        this.Property(x => x.ModifiedBy).HasMaxLength(50);

        this.HasMany(x => x.Cartons)
            .WithRequired(x => x.Shipment)
            .Map(x => x.MapKey("ShipmentId"));
    }

我真的不确定出了什么问题,我已经搜索了stackoverflow和其他论坛,一切似乎都表明我所拥有的是正确的。

1 个答案:

答案 0 :(得分:7)

不知怎的,在经过一天努力想要在这里问了10分钟之后,我成功了。

修复方法是将分配配置更改为:

this.HasMany(a => a.Shipments)
    .WithMany(x => x.Allocations)
    .Map(x =>
         {
             x.MapLeftKey("AllocationId");
             x.MapRightKey("ShipmentId");
             x.ToTable("ShipmentAllocation");
          });

即添加x =&gt; x.Anocations to WithMany()。

我不是百分之百确定为什么需要它,我认为它迫使Entity Framework使用我的列名而不是尝试自己创建它们。如果有其他人有更多的意见请分享!