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Variable List and Calculated Field

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  • Variable List and Calculated Field

    In a report I am trying to create a calculated field that counts the records from one table that meet various criteria. One of the fields must match a character variable from another table.

    I begin by trying to create a list of character variables that will need to be matched in the code that opens the report. I have tried using Action Scripting as well as X Basic, but can't seem to get it. What I want is a list of variables (v_ptcenter) that can be used in the calculated field ie: from the 'Centers' table return the 'Centername' of all records in which the field 'PartTime' is True.
    Then I have a calculated field on the report:
    c_PTCenters =
    Code:
    tablecount("tbl_hstart",between_date("tbl_hstart->Scr_Enroll",Var->SDate,Var->EndDate)+".AND..NOT."+between_date("Tbl_Hstart->Scr_Withd",Var->SDate,Var->EndDate)+".AND."+"Tbl_Hstart->Center = '"+Var->v_ptcenter+"'")
    In this calculated field it counts the records matching dates in criteria one and two, and the third criteria is supposed to be set by the variable list.

    With every attempt I seem to not be able to create this variable list when opening the report. (This is the first time I have ever worked with a LIST of variables)

    Joe

  • #2
    Re: Variable List and Calculated Field

    May I suggest that you use a script to compute the desired values, and then have the script dump the computed results into a separate table. The report would be based on the table. The table would be emptied after each report has run.

    Comment


    • #3
      Re: Variable List and Calculated Field

      Tom,

      I had not thought of a separate table for the report. That will be helpful, as this report is very complex, with many calculations from different tables.

      I still have the issue of computing the values. What would the script look like to compute the number of records matching the criteria I used as an example?

      Comment


      • #4
        Re: Variable List and Calculated Field

        Have you tried generating the list first using ui_get_list2() to have the user select the selection variables first?
        Mike W
        __________________________
        "I rebel in at least small things to express to the world that I have not completely surrendered"

        Comment


        • #5
          Re: Variable List and Calculated Field

          Joe, the last argument in your tablecount() expression is going to fail because you're telling Alpha to include a center only if the character string in the center field matches the entire variable list. Instead of a direct comparison, you need to use a function that will determine whether the trimmed center string is contained in the list. Since the list is simply a long string of characters I suggest you take a look at using the substring inclusion operator ("$").

          Something like this should help you get going:

          Code:
          .AND. alltrim(Tbl_Hstart->Center) $ Var->v_ptcenter
          where the variable v_ptcenter contains a crlf() delimited list of centers.

          Comment


          • #6
            Re: Variable List and Calculated Field

            Tom,

            I understand now regarding the handling of the list variables, but how do I create the crlf() list of centers? I know this is probably pretty basic stuff, but I can't seem to find an answer.

            Thanks,
            Joe

            Comment


            • #7
              Re: Variable List and Calculated Field

              from the 'Centers' table return the 'Centername' of all records in which the field 'PartTime' is True.
              Code:
              v_ptcenter = table.external_record_content_get("centers","centername","centername","parttime")
              There can be only one.

              Comment


              • #8
                Re: Variable List and Calculated Field

                I try to find these answers for hours some times with no luck, and finally resort to asking the questions. This message board and your help are a great resource for beginners like me.

                Thanks to all,
                Joe

                Comment


                • #9
                  Re: Variable List and Calculated Field

                  I try to find these answers for hours some times with no luck, and finally resort to asking the questions.
                  Yes, but the knowledge you build while searching far outweighs that gained by those who give up immediately and ask "How do I ... ?" As you are searching you are probably making mental "I can use that later" notes.

                  When I stumble across something that I don't remember seeing before in the documentation, I hit that print icon in the help toobar and save the page for followup.
                  There can be only one.

                  Comment


                  • #10
                    Re: Variable List and Calculated Field

                    When I stumble across something that I don't remember seeing before in the documentation, I hit that print icon in the help toobar and save the page for followup.
                    Most of us simply do not have that much paper on hand Stan!! :D But I agree completely about the searching being very beneficial.
                    Mike
                    __________________________________________
                    It is only when we forget all our learning that we begin to know.
                    It's not what you look at that matters, it's what you see.
                    Henry David Thoreau
                    __________________________________________



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