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Data Validation Expression

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    Data Validation Expression

    I need to prompt users when they try to save a medical record number that has already been used. In SQL I have a field that combines the Medical Record number and a user's unique client ID when ever a record is saved (this ensures even if two different clients happen to use the same MR number I'll have a unique entry). I believe I need a custom validation expression for this situation...is that correct? ...I'm not sure what to write in here to make this work (see pic below). The Client ID (ClientID) is a INT type in SQL and Medical Record (MRNum) is a varchar type...if that matters. I combined them in SQL (MRNum_ClientID) like this: ([MRNum]+CONVERT([varchar],[ClientID],(0)))

    [/URL]

    Any advice/help you could offer is appreciated.

    -Mike
    Last edited by mikeallenbrown; 06-17-2013, 06:20 PM.
    Mike Brown - Contact Me
    Programmatic Technologies, LLC
    Programmatic-Technologies.com
    Independent Developer & Consultant​​

    #2
    Re: Data Validation Expression

    ...another thought: This expression would need to use a session variable (which is the ClientID) along with the MR number the user types in to then validate that data against MRNum_ClientID. Just not sure on the correct syntax for this .... something like (session.__protected__clientid)(CurrentValue) or something?

    -Mike
    Last edited by mikeallenbrown; 06-17-2013, 06:25 PM.
    Mike Brown - Contact Me
    Programmatic Technologies, LLC
    Programmatic-Technologies.com
    Independent Developer & Consultant​​

    Comment


      #3
      Re: Data Validation Expression

      why not use a "cross file validation"?
      if I understood correctly you don't want the user to re-enter the MRNum if it is already entered.
      you can achieve this with "cross file validation" use the same table and field and select must not exist...

      paul

      Comment


        #4
        Re: Data Validation Expression

        Originally posted by PaulAmmoun View Post
        why not use a "cross file validation"?
        if I understood correctly you don't want the user to re-enter the MRNum if it is already entered.
        you can achieve this with "cross file validation" use the same table and field and select must not exist...

        paul
        The ClientID and MRNum come together in SQL (see above). In Alpha MRNum has nothing to do with the clientID. When I click on the MRNum field, then validation, I could do what you suggest but only the MR number is then being validated against the other MRNum's in SQL...that wouldn't work. I have dozens of clients and one or more could possibly use the same MR number, hence, my unique entry of combining the MR number and client ID.

        I need alpha to take the session variable (session.__protected__clientID) combine it with the MRNum that the user enters in and then check that against my MRNum_ClientID in SQL.

        So if a users clientID is 5001 and they enter in 12345 as the medical record number Alpha needs to use 500112345 for the validation.

        Does that makes sense? ...sorry if I'm being ambiguous.

        -Mike
        Mike Brown - Contact Me
        Programmatic Technologies, LLC
        Programmatic-Technologies.com
        Independent Developer & Consultant​​

        Comment


          #5
          Re: Data Validation Expression

          ...maybe this needs to be worked out in xbasic? ...just not sure how to go about this.

          -Mike
          Mike Brown - Contact Me
          Programmatic Technologies, LLC
          Programmatic-Technologies.com
          Independent Developer & Consultant​​

          Comment


            #6
            Re: Data Validation Expression

            You can concatenate the columns like you did and then make a SQL view with the same columns concatenated. I did this once and I think I made it part of a calculated field and then hid it. Or why not make an index and then use the OnSQLError under the server side events. That works very well.

            Comment


              #7
              Re: Data Validation Expression

              Originally posted by lvasic View Post
              You can concatenate the columns like you did and then make a SQL view with the same columns concatenated. I did this once and I think I made it part of a calculated field and then hid it. Or why not make an index and then use the OnSQLError under the server side events. That works very well.
              I'm not familiar enough with SQL to "make an index" (I'm still a novice) ... I'll need to read up on that. So you are saying I can make this SQL index and then use the OnSQLError in Alpha to do what I need?

              -Mike
              Mike Brown - Contact Me
              Programmatic Technologies, LLC
              Programmatic-Technologies.com
              Independent Developer & Consultant​​

              Comment


                #8
                Re: Data Validation Expression

                If I understand what you are trying to do. The index will return an error that so that you can't add a duplicate. You can capture that error in the onsqlerror event and then make your own error message that is more user friendly.

                Comment


                  #9
                  Re: Data Validation Expression

                  hello

                  you don't need to have a view
                  you can do this validation on the on change event in the grid of a field using xbasic, i am sure.

                  say for example you have one field, user, and is filled with gandhi
                  then you have another field, mr_number, and are about to fill that with mr1001.
                  on change event for this field will fire then check for existence of those two fields (gandhi & mr_1001) in the database, if there is a record already present, pop up an alert.

                  (note: i have separate fields in sql, not a combined fields as you described in post #1)
                  Last edited by GGandhi; 06-19-2013, 09:10 AM.
                  thanks for reading

                  gandhi

                  version 11 3381 - 4096
                  mysql backend
                  http://www.alphawebprogramming.blogspot.com
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                  Comment


                    #10
                    Re: Data Validation Expression

                    Originally posted by lvasic View Post
                    If I understand what you are trying to do. The index will return an error that so that you can't add a duplicate. You can capture that error in the onsqlerror event and then make your own error message that is more user friendly.
                    This worked! ...thank you!

                    For those who are following or come upon this in the future this is what I did:

                    First I created the index. Then I activated the 'OnSQLExecuteError'.

                    Thank you for the help

                    -Mike



                    Mike Brown - Contact Me
                    Programmatic Technologies, LLC
                    Programmatic-Technologies.com
                    Independent Developer & Consultant​​

                    Comment


                      #11
                      Re: Data Validation Expression

                      Excellent!

                      Comment


                        #12
                        Re: Data Validation Expression

                        very good.

                        but one thing to consider, in this scenario:
                        the entire record needs to be filled and get the warning just before inserting the data
                        on the other hand if you verify the existence as soon as the involved two fields are checked the form need not be filled at all and the process can be aborted. saving time for the person filling the information.
                        thanks for reading

                        gandhi

                        version 11 3381 - 4096
                        mysql backend
                        http://www.alphawebprogramming.blogspot.com
                        [email protected]
                        Skype:[email protected]
                        1 914 924 5171

                        Comment

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