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Regular Expression problem

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  • Regular Expression problem

    I am using a regular expression to validate a South African Identity number in a dialog. When I test using the test value option in the field validation dialog it works but when I try it in working preview or in the browser the validation fails. This the expression
    (((\d{2}((0[13578]|1[02])(0[1-9]|[12]\d|3[01])|(0[13456789]|1[012])(0[1-9]|[12]\d|30)|02(0[1-9]|1\d|2[0-8])))|([02468][048]|[13579][26])0229))(( |-)(\d{4})( |-)(\d{3})|(\d{7}))
    . Validates correctly in the field validation dialog, A.PNG. When I test it in Working preview it gives me an error. AA.PNG. Where am I going wrong

  • #2
    Re: Regular Expression problem


    I applaud your efforts at trying to code this, but Alpha can make this job much easier for you. If you have a list of valid numbers, you can then store them into a small database and use validation to check them there. While Alpha will allow you to use code like this, it is quite confusing and a horror to debug. What happens later when you want to make a change or update something?


    • #3
      Re: Regular Expression problem

      Hi Charles.
      Thank you very much for your advice. The regular expression is given by the Department of home affairs in South Africa and is used by numerous applications to validate South African citizens identification numbers. It is highly unlikely that it will change. I don't understand your proposed solution to check against a small database. I will really appreciate it if you could elaborate and maybe give a small example

      What is strange about the expression is that it works fine in a grid. It only fails in a dialog


      • #4
        Re: Regular Expression problem

        Leading or training spaces will cause the expression to fail. "7403115084088" will validate while "7403115084088 " will fail. Depending on the build, the dialog should strip the spaces. The validation works fine in the current release build with the value in the image.


        • #5
          Re: Regular Expression problem

          Hmmm. I tried it and it validated in test for me and in a grid with detail. So I can confirm it is working. Do you have the field set for the correct number of characters in the dialog? In one of my iterations, I didn't do that and it failed.



          • #6
            Re: Regular Expression problem

            Sorry Jerry! We both responded at the same time!

            Jerry is correct. Try trimming the function with Alltrim().



            • #7
              Re: Regular Expression problem

              Thank you Charlie & Jerry. I currently run version 2873, build 3990. It doesn't strip out the trailing spaces. I did however validated length and this sorted out the problem