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Form Filter Error

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    #1

    Form Filter Error

    OK - I am new to Alpha and trying to learn. I am a long time Access user and have created advanced apps and such. Program VBA. I have gone through the 8 hrs of instructional videos that came with Alpha and did search the forum as to not be wasting anyones time.

    I have created a simple form with an embedded browse. I want to restrict the records to those that match a simple criteria (see attached). Form created in minutes, the browse automatically sync to the parent record... all is well. And yes, done in a fraction of the time this crude form would have taken in access.

    But, I am gettinga filter error. See attached. In the main form, I entered a filter expression built from the Alpha genie. Had to tweak the expression for true false, but it works. The form generates the error, but after you hit OK, it opens fine, filtered and all. If I go to form view from design view, no error. only when opening form from control panel. Other annoying part is when you go to properties of the form, sometimes the filter expression is gone. Unrelated to thread though.

    Sorry to write so much. If an Alpha believer could respond with any experience for this old Access guy, it would be great. Just trying to feel my way around and see if there are benefits of us switching. This form was a first start.

    Thanks

    Wayne
    Tags: None
    #2
    Re: Form Filter Error

    I'll bet ysnactive is a logical field you've formatted to show on the form as True/False. If so you would need to test

    (Ysnactive <> .F.)

    or

    (Ysnactive = .T.)

    or merely

    Ysnactive

    Formatting doesn't change the underlying value (logical not character "False").
    There can be only one.

    Comment

      #3
      Re: Form Filter Error

      Thanks for the quick response Stan.

      You are correct, it is a logical field. In my SQL backend, it is a 0 or -1 value. In A5, its value is F or T.

      If I use a select statement

      (StrJobType <> "Service") .and. (Ysnactive <> "False")

      It returns the right value.

      I removed by formatting on the form (its back to F or T) and entered all three of your suggesions (Ysnactive <> .F.),etc.

      None of them actually filter the underlying values. Not sure if it is because of Link tables or something. It is apparent A5 does not like my use of filter text when it knows it is a logical field.

      Comment

        #4
        Re: Form Filter Error

        Not that familiar with the SQL backend. Are you using Alpha active link tables? If you do, what do you see in this field if you view the default browse? Can you screenshot the table's structure and a browse?
        There can be only one.

        Comment

          #5
          Re: Form Filter Error

          Attached are the screen shots.

          Yes, its is an A5 link table.

          Thanks for looking at this. I am sure this is an elementary question.

          In Access, I would not do a filter on the form. I would create a query and then base the forms data properties on the query. There is probably a way to do this in action scripting if I play with it.

          Comment

            #6
            Re: Form Filter Error

            Since I'm guessing.

            Try making the filter simply strjobtype <> "service". That should be ok. Then try only the logical test ysnactive <> .F., etc. Since you may be seeing Alpha's representation of the SQL backend, try ysnactive <> -1.
            There can be only one.

            Comment

              #7
              Re: Form Filter Error

              I tried ysnactive = 1 or ysnactive = T Both of these work.

              Basically, if you remove the .T. or .1. and let it look for text, the filter works great. Only issue is when you launch the form from the control panel, it errors out. If you launch from design view, no problems.

              I believe the issue is that A5 knows its a logical field and wants it the filter worded with the periods. Not sure if there is an expression that I could use to convert the logical to a string value in the expression.

              Thanks for your time... I think it is Give up time and move on.

              Comment

                #8
                Re: Form Filter Error

                Code:
                ? convert_type("T","L")
= .T.
? convert_type("N","L")
= .F.

? convert_type("0","L")
= .F.
? convert_type("1","L")
= .T.

sqlbackfield = -1
? convert_type(sqlbackfield+1,"l")
= .F.
sqlbackfield = 0
? convert_type(sqlbackfield+1,"l")
= .T.
                There can be only one.

                Comment

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