/// <summary>
/// 检测被删除的数据是否存在引用它的数据
/// </summary>
/// <param name="dm"></param>
/// <param name="modalcontext"></param>
/// <param name="d"></param>
/// <param name="view"></param>
/// <returns></returns>
private bool CheckDeleteRefenceExists(
IDataModel dm,
IDataUpdateContext modalcontext,
DeleteCheckRefenceAttribute d,
out long fid)
{
Type rd = d.CheckModalType;
if (rd == null)
{
rd = modalcontext.ModalType;
}
fid = (long)modalcontext.Data.GetPropertyValue("Id");
List <string> filternames = new List <string>();
List <object> filtervalues = new List <object>();
filternames.Add(d.RefenceFieldName);
filtervalues.Add(fid);
string softkey = rd.GetDataModel().GetSoftDeleteFieldName();
if (!string.IsNullOrEmpty(softkey))
{
filternames.Add(softkey);
filtervalues.Add(false);
}
return(CurrentSelector.GetDataByFieldEqValue(rd, filternames, filtervalues, new string[] { "Id" }) != null);
}
/// <summary>
/// 删除时检测被引用的数据
/// </summary>
/// <param name="dm"></param>
/// <param name="modalcontext"></param>
/// <param name="errors"></param>
/// <param name="view"></param>
private void CheckDeleteRefence(
IDataModel dm,
IDataUpdateContext modalcontext,
IList <DataModalFieldException> errors)
{
if (modalcontext.ModalState != ModalState.Delete)
{
return;
}
IEnumerable <DeleteCheckRefenceAttribute> x = SelectAttributesFromType <DeleteCheckRefenceAttribute>(modalcontext.ModalType);
if (x != null)
{
foreach (DeleteCheckRefenceAttribute attr in x)
{
DeleteCheckRefenceAttribute y = attr as DeleteCheckRefenceAttribute;
if (y.IsChild)
{
continue;
}
long fid;
if (CheckDeleteRefenceExists(dm, modalcontext, y, out fid))
{
var dm2 = y.CheckModalType != null?y.CheckModalType.GetDataModel() : dm;
string note = string.Format(LocalResource.RecordIsRefencedError, dm.DisplayName, dm2.DisplayName, fid);
DataModalFieldIsOnRefencedException b = new DataModalFieldIsOnRefencedException("Id", note);
errors.Add(b);
}
}
}
}
