Refresh of ADOTable after Cascaded Delete

Hi,
  I have a MS Access database (older .mdb file) that has relationships defined which includes cascaded deletes. I am using ADOTable components (because I grew up on BDE and am now an old dog) where I delete a record in table A and it cascades down and deletes a record in table B automatically.

 My code knew that the Table B record needed to be deleted but it does not know this record in Table B was deleted through the cascade.

 I have a MYID primary key in table B and var myidnum has the number of the TableB Primary Key I wish to delete.

 I wrote:
       If TableB.Locate (['MYID',myidnum,[]) 
            Then TableB.Delete;

 The Locate returns True but I get an  EOleException on the Delete as the record can not be found.

I tried a TableB.Refresh before the Locate but that did not help.

What fixed the problem was:
    TableB.Active := False;
    TableB.Active := True
    If TableB.Locate('MYID',myidnum,[]) 
         Then TableB.Delete;

With the toggle of the Active property the Locate fails, the .Delete method is never called, and life is good..

Question:

  Is there anything more "Correct" than the toggle of .Active?

  Any general descriptions of what is going on and maybe causing problems? (Like maybe cursors?)

Thanks,
Bob K.
0
Robert
6/30/2015 12:34:06 AM
embarcadero.delphi.ado 597 articles. 1 followers. Follow

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