On Mon, Apr 27, 2020 at 6:54 PM Eric Naujock via 4D_Tech < [email protected]> wrote:
> I am trying to preform an unusual query. I em effectively thing to find > all the records in a parent where the parent has children. Any suggestions > other than build a collection of records primary keys and use an “in” > conditional. Which feels dirty. > > > This this case I have a table “cases” with records and a Child table with > records. There is a one to many relationship from child to parent with a > return path of “childReference_return” I am looking for all the parents who > have children. There is more to the query but I am only looking at this > parent child element. > Not sure if I understand it, but why not to select all children and map them to parents? You would have something like this: $records:=ds.Children.all().parentReference where parentReference is name of relation from Children to Parents tables. HTH, Peter Bozek > > > I have tried using something like. > > $records:=ds.Parents.query (“childReference_return.length>0”) > > But when I do this I get null back. > ********************************************************************** > 4D Internet Users Group (4D iNUG) > Archive: http://lists.4d.com/archives.html > Options: https://lists.4d.com/mailman/options/4d_tech > Unsub: mailto:[email protected] > ********************************************************************** ********************************************************************** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
