用父/子刪除問題

從會話中刪除子記錄時出現問題。這裏是我所定義的實體：用父/子刪除問題

public class ReportedData 
{ 
    public virtual int ReportedDataID { get; set; } 
    public virtual ReportedDataTypes Type { get; set; } 
    public virtual string Reason { get; set; } 

    public virtual IList<ArticleCommentReported> ArticleCommentsReported { get; private set; } 
    public virtual IList<ForumPostReported> ForumPostsReported { get; private set; } 

    public ReportedData() 
    { 
     ArticleCommentsReported = new List<ArticleCommentReported>(); 
     ForumPostsReported = new List<ForumPostReported>(); 
    } 
} 

public class ArticleCommentReported : ReportedData 
{ 
    public virtual ArticleComment Comment { get; set; } 
} 

public class ForumPostReported : ReportedData 
{ 
    public virtual ForumPost Post { get; set; } 
}

用下面流利的映射：

public ReportedDataMap() 
{ 
    Table("ReportedData"); 
    Id(x => x.ReportedDataID); 
    Map(x => x.Type, "TypeID"); 
    Map(x => x.Reason); 
    HasMany(x => x.ArticleCommentsReported) 
     .KeyColumn("ReportedDataID") 
     .Inverse() 
     .Cascade.All(); 
    HasMany(x => x.ForumPostsReported) 
     .KeyColumn("ReportedDataID") 
     .Inverse() 
     .Cascade.All(); 
} 

public class ArticleCommentReportedMap : SubclassMap<ArticleCommentReported> 
{ 
    public ArticleCommentReportedMap() 
    { 
     Table("ArticleCommentsReported"); 
     KeyColumn("ReportedDataID"); 
     References(x => x.Comment, "CommentID"); 
    } 
} 

public class ForumPostReportedMap : SubclassMap<ForumPostReported> 
{ 
    public ForumPostReportedMap() 
    { 
     Table("ForumPostsReported"); 
     KeyColumn("ReportedDataID"); 
     References(x => x.Post, "PostID"); 
    } 
}

現在說我嘗試以下方法（我已經添加了註釋，以幫助您瞭解這是怎麼回事）：

// Loop over the reported data (this is my view model and not my actual model which contains an extra property for the action they wish to carry out) 
foreach (var reportedData in model) 
{ 
    // If the action is leave then do nothing (else we always delete the reported data) 
    if (reportedData.Action != ReportedDataActions.Leave) 
    { 
     // Switch over the type since we need to make sure it deletes the article comment or post if the action is set to delete 
     switch (reportedData.Type) 
     { 
      case ReportedDataTypes.ArticleComment: 
       var reportedComment = _context.Repository<ArticleCommentReported>().GetByID(reportedData.ReportedDataID); 

       if (reportedData.Action == ReportedDataActions.Delete) 
        _context.Repository<ArticleComment>().Delete(reportedComment.Comment); 

       _context.Repository<ArticleCommentReported>().Delete(reportedComment); 

       break; 
      case ReportedDataTypes.ForumPost: 
       var reportedPost = _context.Repository<ForumPostReported>().GetByID(reportedData.ReportedDataID); 

       if (reportedData.Action == ReportedDataActions.Delete) 
        _forumService.DeletePost(reportedPost.Post); 

       _context.Repository<ForumPostReported>().Delete(reportedPost); 

       break; 
     } 
    } 
} 

_context.Commit();

當用戶嘗試刪除論壇帖子（針對報告的數據的操作設置爲刪除）時，會引發以下錯誤：

行被其它事務更新或刪除（或者未保存值的映射是不正確的）：[ForumPostReported＃2]

我大概可以設置一些映射爲自動刪除該帖子/評論一次報告的數據將被刪除但如果該操作設置爲刪除，我只想刪除帖子/評論。

我會很感激，如果有人可以幫忙。謝謝

來源

2010-10-05 nfplee

問題解決！我只需要先刪除報告的項目。似乎有點落後，但它的作品，這就是我所關心的。

來源

2010-10-07 19:05:18 nfplee

用父/子刪除問題

回答

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