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Can a 1:M set be filtered for one Parent and selected childs?

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  • Can a 1:M set be filtered for one Parent and selected childs?

    Attached is an example of a set with parent 1:M child. Can the parent table be filtered to one parent and also have the linked children be filtered to a select group of child records? if so...how? (The names are in separate fields. Below is just a visual of what I desire.) The parent is viewed through an embedded browse. I only wantto see the one parent.

    Code:
    Parent	                 Child
    Lincoln, Abe	            Lincoln, Kim
    	                    Lincoln, Karl
    	                    Lincoln, Bob
    washington, george          washington, Jim
    	                    washington, John
    	                    washington, Jill
    	                   washington, Karen
    	                   washington, Bill
    Mike W
    __________________________
    "I rebel in at least small things to express to the world that I have not completely surrendered"

  • #2
    Re: Can a 1:M set be filtered for one Parent and selected childs?

    Didn't we do this once before... long time ago..in a galaxy far far away?

    Run the topparent.queryrun() twice:
    First filtering the parent at cross level
    Then filtering at the child level.

    Comment


    • #3
      Re: Can a 1:M set be filtered for one Parent and selected childs?

      Mike,

      Here's an example that achieves the desired result by manipulating the filter expressions applicable to the tables supporting the form. This approach can break the set linkages so it should be used with care. See, Toms_Form for the example buttons.

      G, another lap around the track might be useful to some. How about putting an example together using the supplied database?

      -- tom

      Comment


      • #4
        Re: Can a 1:M set be filtered for one Parent and selected childs?

        Gabe,
        Thanks, that method to establish the query worked well. Although, I have yet to figure out how to undo/drop/break the query combination.

        Tom,
        Thank you very, very much. Establishing the filter AND reversing the query work well!
        Mike W
        __________________________
        "I rebel in at least small things to express to the world that I have not completely surrendered"

        Comment


        • #5
          Re: Can a 1:M set be filtered for one Parent and selected childs?

          Mike,

          I took a similar approach to Tom. But I split the difference. Set the base query of the form at the parent level to 'Washington' and then queryrun() on the child for 'J'. This way you can use the show all button leaving the parent filter but clearing the child filter and allowing you to filter on a different letter.

          EDIT: My code is on the bottom two buttons.
          Tim Kiebert
          Eagle Creek Citrus
          A complex system that does not work is invariably found to have evolved from a simpler system that worked just fine.

          Comment


          • #6
            Re: Can a 1:M set be filtered for one Parent and selected childs?

            Tim,
            I couldn't quite find a way to break through the filter on the child table after using queryrun() without resorting to using the explicite filters and queries. 'Show All' did nothing as far as I could see, for the child tables. BUT I got it working the way I needed and I think is a good example of filtering parent and child tables (see attached).

            Tom, Tim, as always, you have helped me greatly!

            A few words for searchers (me mostly):
            Keywords: filter parent child set, filtering child table, filter child table in parent-child set, filter child browse, independantly.
            Last edited by Mike Wilson; 10-19-2007, 01:58 PM.
            Mike W
            __________________________
            "I rebel in at least small things to express to the world that I have not completely surrendered"

            Comment


            • #7
              Re: Can a 1:M set be filtered for one Parent and selected childs?

              Mike,

              In my example (pcfilter2) to release the child query using the form's show all button you have to activate the child browse first by clicking in it and then F5 to refresh the form. Using code (which I didn't include) would be
              Code:
              topparent:Browse1.show_all()
              topparent:Browse1.fetch_first()
              I have attached an other sample for you again using a queryrun for the child. There is also a second form using queryrun() for the parent as well as per Gabe' suggestion (almost). For the parent query the queryrun was set to the parent table instead of <crosslevel>.
              Tim Kiebert
              Eagle Creek Citrus
              A complex system that does not work is invariably found to have evolved from a simpler system that worked just fine.

              Comment


              • #8
                Re: Can a 1:M set be filtered for one Parent and selected childs?

                Tim,
                Outstanding! I have to share with ya'll (I have roots in Texas,.. Hi Martin), that this thread has consolidated a huge, lingering vacancy for me.. and I hope others can appreciate the thread also.

                Thank you all, big time!! (another Texan term).
                Mike W
                __________________________
                "I rebel in at least small things to express to the world that I have not completely surrendered"

                Comment


                • #9
                  Re: Can a 1:M set be filtered for one Parent and selected childs?

                  Tom:
                  This approach can break the set linkages so it should be used with care.
                  Just got around to opening zip files. Like your approach as a pretty good alternative and don't see any concern that it might break the link.

                  Perhaps, only advantages of querryrun() over that would be:
                  a-Not sure if your approach will open a second instance of the table or not. Maybe not.
                  b-ability to sort. Maybe you could add a sorting element to your approach.
                  Resolving these two issues would make these two approaches equally good.

                  Tim:
                  Didn't open your zip and assumed your approach is a hybrid between querryrun() and Tom's.

                  Mike:
                  To show all:
                  Re-run queryrun() and use as a filter .t.

                  Hopefully, this will put this baby to sleep.

                  Comment


                  • #10
                    Re: Can a 1:M set be filtered for one Parent and selected childs?

                    Originally posted by G Gabriel View Post
                    Hopefully, this will put this baby to sleep.
                    Curly:
                    snooooorrrrr,...... woop oop, oop, oop, oop, oop

                    snooooorrrrr...............wopp, oop, oop, oop, oop, oop

                    snooooorrrrr,............wopp, oop, oop, oop, oop, oop
                    Mike W
                    __________________________
                    "I rebel in at least small things to express to the world that I have not completely surrendered"

                    Comment


                    • #11
                      Re: Can a 1:M set be filtered for one Parent and selected childs?

                      I'm going to bump this thread because the original question was actually not solved. The need I have again is to filter the Parent table for values found in the child table. I found this thread searching for "filter parent". In the example below, what expression gets the parent table filtered to show Alabama and Maine for the query for states with towns named Milton. I used to be able to use inlist2() but now my expression length exceeds the 1024 character expression limit.

                      Code:
                      PARENT     CHILD
                      States       Towns
                      
                      Alabama      Milton
                      	     Frankton
                      	     West Niles
                      	     Grettle
                      
                      Michigan     Rapidsville
                                   Westmont
                                   Hillsdale
                                   Hilltop
                      
                      Maine	     Milton
                      	     Clarksville
                      	     Trenton
                      	     Victory
                      Mike W
                      __________________________
                      "I rebel in at least small things to express to the world that I have not completely surrendered"

                      Comment


                      • #12
                        Re: Can a 1:M set be filtered for one Parent and selected childs?

                        Where do you need to see/do this. It is exceedingly simple with an inverse of the current set.
                        There can be only one.

                        Comment


                        • #13
                          Re: Can a 1:M set be filtered for one Parent and selected childs?

                          Mike, you've changed to a different (but admittedly similar) question. <grin>

                          Comment


                          • #14
                            Re: Can a 1:M set be filtered for one Parent and selected childs?

                            Mike:
                            Have you looked into flattenquerry()?

                            Comment


                            • #15
                              Re: Can a 1:M set be filtered for one Parent and selected childs?

                              The outcome is seeing the filtered parent records and child records in a set based on parent (1:M) child set. So the inverted set isn't an option here. I have never had success with flattenquerry()..... EXCEPT FOR TONIGHT!!!! That is the ticket!! Thanks for the bump Gabe!

                              The set: Ship_docs_hdr (parent) Ship_docs_events (child)

                              Code:
                              dim vship_vendor_id as C="VND.00039"
                              DIM records_found as N
                              records_found = topparent.queryrun(flattenquery("ship_docs_events->Ship_Vend_Id="+quote(vship_vendor_ID)),"","","No","<Cross Level>",.f.)
                              Mike W
                              __________________________
                              "I rebel in at least small things to express to the world that I have not completely surrendered"

                              Comment

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