EF中的列名無效

我有一種情況，EF試圖從表「VideoClip」中獲取字段值，我沒有要求它獲取。EF中的列名無效

Database schema showing the tables NewsItemVideoClip, NewsItem, VideoClip and Video

完整生成的查詢看起來是這樣的：

SELECT 
[Project1].[Id] AS [Id], 
[Project1].[NewsItemId] AS [NewsItemId], 
[Project1].[VideoClipId] AS [VideoClipId], 
[Project1].[DisplayOrder] AS [DisplayOrder], 
[Project1].[Video_Id] AS [Video_Id] 
FROM (SELECT 
    [Extent1].[Id] AS [Id], 
    [Extent1].[NewsItemId] AS [NewsItemId], 
    [Extent1].[VideoClipId] AS [VideoClipId], 
    [Extent1].[DisplayOrder] AS [DisplayOrder], 
    [Extent1].[Video_Id] AS [Video_Id] 
    FROM [dbo].[NewsItemVideoClip] AS [Extent1] 
    WHERE [Extent1].[NewsItemId] = @p__linq__0 
) AS [Project1] 
ORDER BY [Project1].[DisplayOrder] DESC

但是，我NewsItemVideoClip實體類看起來是這樣的：

public class NewsItemVideoClip : Entity 
{ 
    public virtual int NewsItemId { get; set; } 
    public virtual int VideoClipId { get; set; } 
    public virtual int DisplayOrder { get; set; } 
    public virtual NewsItem NewsItem { get; set; } 
    public virtual VideoClip VideoClip { get; set; } 
}

映射：

public class NewsItemVideoClipEntityMapping 
    : EntityTypeConfiguration<NewsItemVideoClip> 
{ 
    public NewsItemVideoClipEntityMapping() 
    { 
     //configure key and properties 
     HasKey(c => c.Id); 

     this.HasRequired(x => x.NewsItem) 
      .WithMany(x => x.NewsItemVideoClips) 
      .HasForeignKey(x => x.NewsItemId); 

     this.HasRequired(x => x.VideoClip) 
      .WithMany(x => x.NewsItemVideos) 
      .HasForeignKey(x => x.VideoClipId); 

     //configure table map 
     ToTable("NewsItemVideoClip"); 
    } 
}

LINQ查詢：

public IList<NewsItemVideoClip> GetVideoClips(int newsItemId) 
{ 
    var query = from nvc in _newsItemVideoClipRepository.GetAll() 
       where nvc.NewsItemId == newsItemId 
       orderby nvc.DisplayOrder descending 
       select nvc; 

    var newsItemVideoClips = query.ToList(); 
    return newsItemVideoClips; 
}

Howcome EF給我：Invalid column name 'Video_Id'？

來源

2013-03-15 Roman

您可以請發佈您的LINQ查詢嗎？ – IronMan84 2013-03-15 14:45:17

Video_Id將是它期待的視頻表的外鍵。檢查你的視頻模式類和流利的映射，看看它是否有多個/集合引用NewsItemVideoClip。 – AaronLS 2013-03-18 05:06:33

Omg！我爲此做了什麼？））） – Roman 2013-03-18 05:12:47

根據你的圖表，VideoClip有一個VideoId，我猜你是你的視頻的外鍵。 Video_Id將作爲外鍵映射的缺省外鍵的默認外鍵名稱，否則將命名它。所以可能需要.HasForeignKey(x => x.VideoId);到您的VideoClip映射。

來源

2013-03-18 05:10:30 AaronLS

EF中的列名無效

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