已删除的对象由级联重新保存 - 自引用表

Question

我收到以下错误：    “已删除的对象将通过级联重新保存（从关联中删除已删除的对象）”

我已将整个ajax调用修剪为以下内容：

    [HttpPost]
    [UnitOfWork(Scope = FilterScope.Result)]
    public ActionResult SaveEditMode(long id, AddTrackedRowViewModel model, string editMode, List<string> elementNames, string provisionData)
    {    
       var cell = _supplementCoordinator.GetSupplement(id).TrackedTables.First(x => x.Name == model.Name).TrackedRows.First(x => x.Ordinal == model.Ordinal).TrackedCells.First(x => x.Name == "Detail");
       _supplementCoordinator.RemoveChildren(cell);

        return Json( new {Success = true});
    }



    public bool RemoveChildren(TrackedNode parentNode)
    {
        foreach (TrackedField trackedField in parentNode.ChildNodes)
        {
            _trackedFieldRepository.Delete(trackedField);
        }
        return true;
    }

我的映射如下

        mapping.HasMany(x => x.ChildNodes).KeyColumn("ParentNodeId").Inverse();
        mapping.References(x => x.ParentNode);

Answer 1

只需从错误提示中删除父集合中的子节点：

public bool RemoveChildren(TrackedNode parentNode)
    {
        foreach (TrackedField trackedField in new List<TrackField>(parentNode.ChildNodes))
        {
            _trackedFieldRepository.Delete(trackedField);
            _parentNode.Remove(trackField);
        }
        return true;
    }