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Filter on embedded browse based on blank child records

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    #16
    Re: Filter on embedded browse based on blank child records

    Mike I just tried your example, and it doesn't work. Run each button and then count the records - 30 in both cases

    There are only 4 parent records that have no records in the child table

    This would be easy to do if you read each parent one-by-one in a script and possibly mark the ones with no child records, but to filter the table with an expression is the trick
    Cole Custom Programming - Terrell, Texas
    972 524 8714
    [email protected]

    ____________________
    "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

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      #17
      Re: Filter on embedded browse based on blank child records

      Mike,
      When I sent it up, I know it was not embedded. Just wanted to display the data.

      In your example, all the hawbs are in the mawbhawb table..
      Enter a hawb into the hawb table. Do not enter into the Mawbhawb table... Does not work.

      Very much appreciate your efforts. I am confused. L

      Comment


        #18
        Re: Filter on embedded browse based on blank child records

        If this is a bridging table, I suspect that both data need to be present.
        Just got in so I'll have a look at the sample you sent.
        But if the "brains dept" are struggling' so will the rest of us!
        See our Hybrid Option here;
        https://hybridapps.example-software.com/


        Apologies to anyone I haven't managed to upset yet.
        You are held in a queue and I will get to you soon.

        Comment


          #19
          Re: Filter on embedded browse based on blank child records

          I think Larrys use of the term "bridge" here is confusing

          what Lar is saying is show me all the parent records that have no child records

          say in an Invoicing system, someone said, show me all the Invoices that have no Lineitems
          sounds simple, doesn't it.
          Cole Custom Programming - Terrell, Texas
          972 524 8714
          [email protected]

          ____________________
          "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

          Comment


            #20
            Re: Filter on embedded browse based on blank child records

            What about the NoMatch setting in the set?
            See our Hybrid Option here;
            https://hybridapps.example-software.com/


            Apologies to anyone I haven't managed to upset yet.
            You are held in a queue and I will get to you soon.

            Comment


              #21
              Re: Filter on embedded browse based on blank child records

              Ted,

              Nope. Doesn't work. This really seems like it should be so simple..

              Comment


                #22
                Re: Filter on embedded browse based on blank child records

                Originally posted by martinwcole View Post
                Mike I just tried your example, and it doesn't work. Run each button and then count the records - 30 in both cases
                There are only 4 parent records that have no records in the child table
                Martin,
                I downloaded the posted example, unzipped and tried, and it works fine for me.
                Attached Files
                Mike W
                __________________________
                "I rebel in at least small things to express to the world that I have not completely surrendered"

                Comment


                  #23
                  Re: Filter on embedded browse based on blank child records

                  Mike,

                  Add some records the the HAWB table . DO NOT enter any into the hawbmawb table. When you click " See Blanks" the new record in the HAWB table will not appear.

                  As Martin said, "show me all the parent records that have no child records" - That's the ticket.

                  If this helps - An SQL provides the solution as - SELECT Hawb.HAWB, hawbmawb.Mawb FROM Hawb LEFT JOIN hawbmawb ON Hawb.HAWB = hawbmawb.HAWB WHERE (((hawbmawb.Mawb) Is Null));

                  Stumped.

                  Lar

                  Comment


                    #24
                    Re: Filter on embedded browse based on blank child records

                    I think this does it Lar.
                    Try Test 101.
                    Add records in HAWB.
                    See Test 101.
                    I changed a few bits in the Set as well.
                    Attached Files
                    See our Hybrid Option here;
                    https://hybridapps.example-software.com/


                    Apologies to anyone I haven't managed to upset yet.
                    You are held in a queue and I will get to you soon.

                    Comment


                      #25
                      Re: Filter on embedded browse based on blank child records

                      Larry, the ADB contains no data. Pls supply the DBF, CDX, FPT files for each table and the SEM, SET, and SEX files for any set. -- tom

                      Comment


                        #26
                        Re: Filter on embedded browse based on blank child records

                        show me all the parent records that have no child records
                        This is a very different thing than

                        "show me all the parent records that have children with null values in a non linking field".

                        I interpreted your original post as the "latter", not the "former". Sorry.

                        You're quite correct, in the "former" case an inverted set is of no help.

                        ------------------------------

                        I don't know of a filter expression that would produce the "former" result. Instead, I think this calls for a two step sequence. Using a set in which the bridge table is primary, link one to one to the Hawb table. Run a mark operation to mark all the Hawb records in the set. Then use your original set to display the records, filtering the Hawb table to show only UNmarked records.

                        Comment


                          #27
                          Re: Filter on embedded browse based on blank child records

                          Originally posted by martinwcole View Post
                          but to filter the table with an expression is the trick
                          Originally posted by martinwcole View Post
                          what Lar is saying is show me all the parent records that have no child records


                          Filter the HAWB (parent) table against an index in the HAWBMAWB table. In Mikes sample I used,

                          .NOT. exist(Hawb,"hawbmawb","Hawb")

                          Also, I was going to say the same thing as Tom re the difference between no children and children with missing data.

                          To get children with missing mawb you could do something like
                          lookup("hawbmawb","hawb = '"+ hawb + "'","mawb") = ""

                          or create an index on mawb and use lookupc()

                          and to do both

                          ( .NOT. exist(Hawb,"hawbmawb","Hawb") ) .OR. ( lookup("hawbmawb","hawb = '"+ hawb + "'","mawb") ="")


                          New posts by others were coming in as I was writing and testing this.
                          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


                            #28
                            Re: Filter on embedded browse based on blank child records

                            Larry,
                            OK, I have the whole picture. My suggestion is that you add a logical field "linked" to the hawb table that populates to .f. with a OnEnterRecord field rule and changes to .t. with a hawbmawb OnSaveRecord field rule (see example). Then you can filter the HAWB table to linked=.f. for those that do not have a child.
                            Attached Files
                            Mike W
                            __________________________
                            "I rebel in at least small things to express to the world that I have not completely surrendered"

                            Comment


                              #29
                              Re: Filter on embedded browse based on blank child records

                              Doesn't work for me Mike.
                              Using Larry's Browse buttons on the Bwse still doesn't show the new record in HAWB.
                              In my suggestion in post#24, I put the Bwse in a Form and it seemes to work using Larry's buttons.
                              Maybe Bwse works differently when embedded as opposed to stand alone.
                              See our Hybrid Option here;
                              https://hybridapps.example-software.com/


                              Apologies to anyone I haven't managed to upset yet.
                              You are held in a queue and I will get to you soon.

                              Comment


                                #30
                                Re: Filter on embedded browse based on blank child records

                                This should do it.

                                Lar

                                HawbMawb.zip

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