13 Replies Latest reply on Feb 2, 2012 2:03 PM by philmodjunk

    Still struggling with (even simple) scripts

    JohnNekrews

      Title

      Still struggling with (even simple) scripts

      Post

      Hi Guys,

      I'm really finding this FMP script system difficult, even when trying to accomplish the most simple functions.

      I want to add a script to a button which will prevent access to a particular table/layout if another table/layout is empty, and display a dialog in explanation as to why access is being denied.

      Can anyone guide me in the right direction please?

      Nik

        • 1. Re: Still struggling with (even simple) scripts
          philmodjunk

          And which layout/table is "another table/layout"?

          And a layout can be "empty" by having a zero found set when the table it is based on is not empty.

          Assuming you don't want to leave layout 1 for layout 2 if there are no records in the found set for layout 1, you'd use this script:

          If [ Get ( FoundCount ) > 0 ]
             Go to Layout [Layout 2]
          Else
             Show Custom Dialog ["you cannot go to layout 2..."]
          End If

          • 2. Re: Still struggling with (even simple) scripts
            JohnNekrews

             Tks Phil,

            I'll have a 'play' with your suggestion.

            Essentially I have a database consisting of several data tables which are inter-dependent. There is data which must be present in certain tables before data can be entered into other tables. I just need the application to be 'user-friendly' in this regard.

            Thanks for your help.

            Nik

            • 3. Re: Still struggling with (even simple) scripts
              philmodjunk

              In that case, much can depend on the relationships you've defined and the "table context" at the time your run your script. By "table context" I mean that the current record of the current layout's table will determine what related data in other tables are accessible at that point in time. If you change layouts, you may change the context to that of a different table or a different record and then you get different results.

              • 4. Re: Still struggling with (even simple) scripts
                JohnNekrews

                 Phil,

                Looking at your outline script above, do I replace 'FoundCount' with the tablename/fieldname that I want to query?

                Sorry if I'm being a bit thick, I'm pretty new to FMP (I'm getting old and my brain hurts with trying to understand all this.

                Nik 

                • 5. Re: Still struggling with (even simple) scripts
                  philmodjunk

                  No, get ( FoundCount ) refers to the number of records present in the current layout's found set. This may not work at all for you as this may not be the table or the set of records you need to check before permitting the change in layout.

                  A found set is a group of records from the current layout's table. In the status area next to the green "pie chart", you'll see something like 3/300. In this example, 3 is the number of records in your found set out of 300 records in the layout's table.

                  I think you need to provide a more detailed description of what you are trying to do here. I need to know:

                  What tables are involved and how they are related? On which of these tables is your layout based?

                  • 6. Re: Still struggling with (even simple) scripts
                    JohnNekrews

                    Phil,

                    I attach a copy of the relationship 'map' of what I have so far, each table has a matching layout which are essentially data input screens.

                    Each layout has an identical set of buttons for navigating between layouts.

                    For the proposed use of the application 'T_Setup' will hold a single record which must be entered first. 'T_Sow' is entered next and should automatically receive 'Location' data from 'T_Setup'. 'T_Cal' is next and this also receives 'Location' data from T_Setup'.

                    'T_Survey' is next, this recieves 'Ident' data from 'T_Sow', the whole system falls down if the relevant data isn't entered in this sequence, so what I'm trying to do is 'force' the correct sequence by disabling the aprapriate buttons on each layout.

                    I hope that all sounds clear to you.

                    Nik

                    • 7. Re: Still struggling with (even simple) scripts
                      philmodjunk

                      T_Setup::Location either has global storage specified or is an unstored calculation. Why? (I can tell by how the relationship line connects to it.)

                      Can T_Setup have more than one record?

                      • 8. Re: Still struggling with (even simple) scripts
                        JohnNekrews

                         Phil,

                        There is no requirement for 'T_Setup' to have more than one record, in fact I also need to find a way of limiting it a single record.

                        And yes, 'T_Setup::Location' is specified as global storage because it is displayed on all data input screen layouts.

                        Is this a problem?

                        Nik

                        • 9. Re: Still struggling with (even simple) scripts
                          philmodjunk

                          The thing is, with Location as a global field, you don't need any record present in T_setup to use it for new records in the other tables.

                          Assuming one and only one record in T_Setup, You can use this variation of the original script:

                          If [ get (TotalRecordCount) > 0 ]

                          This get function counts all the records in your table, not just the found set.

                          • 10. Re: Still struggling with (even simple) scripts
                            JohnNekrews

                            Sounds good Phil,

                            But how do I direct the 'get (TotalRecordCount)' towards 'T_Setup' when actively in a different layout? 

                            • 11. Re: Still struggling with (even simple) scripts
                              philmodjunk

                              In this example, I don't see where that would be the case, but to check total records in a different table than that of the current layout, you can do this:

                              Freeze window
                              Go to Layout ["T_Setup" (T_Setup)]
                              If [ Get (totalRecordCount)...
                                 Go to Layout [original layout]
                                  //and so forth in the script
                              Else
                                  Go to layout [oringal layout]
                                 //and so forth.

                              This is an example of what I meant by "table context".

                              In other cases, you may be able to check for the existance of related records via the relationship, but this won't necessarily count all records as it counts or checks for related records and this may not be the same thing in every case.

                              From T_Sow, you could use this check for records in T_Setup:

                              If [ IsEmpty ( T_Setup::Rec#_DBP) // at least one record exists in T_Setup]
                                

                              • 12. Re: Still struggling with (even simple) scripts
                                JohnNekrews

                                 Tks Phil,

                                You really are doing me proud today, I'll get back to wrestling with FMP tomorrow, my old eyes just can't take anymore.

                                Any hint on the best way to limit 'T_Setup' to a single record, bearing in mind that access may still be required for editing purposes?

                                Thanks again for all your forebearance.

                                Nik

                                • 13. Re: Still struggling with (even simple) scripts
                                  philmodjunk

                                  With FileMaker advanced, I can set that layout up with a custom menu where a script replaces the normal new record action. The script can check and only create a new record if get ( TotalRecordCount ) is zero. This works both for selecting new record from the records menu and when using the keyboard shortcut for it.