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filter a list via a session variable

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  • filter a list via a session variable

    I have a grid list based on a MySQL table.
    I need to filter the list based on a crlf delimited session variable.
    The session variable has a list of com_id's like this:


    How do I set up the filter in the grid? As you see there is an argument which is the session.comlist variable. This doesn't work, so I don't know how to do it.
    Any thoughts?

    Mike Reed
    Phoenix, AZ

  • #2
    Re: filter a list via a session variable

    Hi Mike,

    It would work if your argument value was in a comma-delimited, single-quoted format like:



    • #3
      Re: filter a list via a session variable

      Yup, it should. I use the SQL "IN" with a comma delimited list as a grid filter in more than one case and it works great.


      • #4
        Re: filter a list via a session variable

        This doesn't work.

        I have tried several ways to assign the session variable to get it to work in the grid and nothing works.

        xxx, yyy
        'xxx' + crlf() + 'yyy'
        xxx + crlf() + yyy
        'xxx, yyy'


        even tried to make the session variable an array...can't do that.

        The only that works is if the session variable is a single value such as xxx no quotes

        I'm at a loss on how to get this grid to display with multiple value. Does anyone have an idea?

        Mike Reed
        Phoenix, AZ


        • #5
          Re: filter a list via a session variable

          Sometimes there's trouble with arguments and whether they have single quotes around them and what have you. I looked through some of my Xbasic and found how I was setting a variable for an SQL "IN". It's not a session variable but it's a string so it should be the same.

          flag = rs.NextRow()
          if flag then
          dim userfilter as c
          userfilter = "unique_id IN ("
          dim cnt as n
          while flag
          userfilter = userfilter+rs.Data(1)+", "
          cnt = cnt + 1
          flag = rs.NextRow()
          end while
          userfilter = rtrim(userfilter,",")+")"
          'vjscmd = "alert('You Have "+cnt+" Open Requests');"
          vjscmd = "$('openrdiv').innerHTML='<h2>"+name+", You have "+cnt+" Open Requests</h2>';var userfilter = '"+userfilter+"';alert(userfilter);{grid.Object}.gridFilterSet(userfilter);"
          vjscmd = "$('openrdiv').innerHTML='<h2>"+name+", You Currently Have No Open Requests</h2>';"
          end if
          Ignore the extraneous shiznit in my code above and just look at how I set up the userfilter variable. I only included the other stuff to provide context. I know this works.

          In any case, istead of having "IN :comlist" as your filter, with the above method of setting the variable, you would just put in :comlist since "IN" is included in the variable used to set the argument.


          • #6
            Re: filter a list via a session variable

            I would agree that is should work, but it doesn't...unless of course I have done something wrong somewhere. So here is my setup....

            As part of the user login there is a process that runs to set this variable: session.comlist
            For testing purposes the variable is set manually with this command:

            session.comlist = " 'L773,'A2674' "

            The attachment shows the Define Arguments section and a picture of the grid Section that I have setup.
            If the session.comlist is set as "L773" in the login routine, the grid will display, otherwise using all the other combinations I tried will not.

            If I am to use your code, then I'll have to figure a way to use it in the "Code" section of the grid, so I'll give that a try. Thanks for sending that.

            Other note: Even in the section where you Define Arguments if I set the value to anything other than L773, the grid will not display in working preview, again using various formats.
            Attached Files
            Last edited by Mike Reed; 03-12-2014, 11:19 AM.
            Mike Reed
            Phoenix, AZ


            • #7
              Re: filter a list via a session variable

              The first thing I'd try is to set your session variable like this:

              session.comlist = "COM_ID IN ('L773','A2674')"

              and set your filter to only: :comlist

              Basically, putting the whole filter into your argument instead of separating it.

              And see if it works in your current setup.

              If so, we can work on building your variable. If not, we can try something else.


              • #8
                Re: filter a list via a session variable

                I liked that idea.....
                but this came up.

                Mike Reed
                Phoenix, AZ


                • #9
                  Re: filter a list via a session variable

                  Will it work if you switch to native SQL? Also, can you go to advanced/other properties in your grid and set it to show the SQL?


                  • #10
                    Re: filter a list via a session variable

                    Actually, you may be able to just check "Show query statements on Ajax callbacks" under "Advanced" in the grid properties. That should show your statement and what is in the argument when you perform a search on the grid. Also, I just noticed you are using "table or view" in your query definition. Try switching it to "SQL select statement" and then use the query builder. It may allow you to save it then, even with a "supposed" error. That way you can at least debug it while running your component.


                    • #11
                      Re: filter a list via a session variable

                      Thank you for your help! I appreciate it.

                      I will work on these ideas today and see where I go with them. Gotta finish some other things, then I'll go back to this.


                      Mike Reed
                      Phoenix, AZ


                      • #12
                        Re: filter a list via a session variable

                        I think the issue there is that if your argument is defined as CHARACTER, the A5 may automatically add single quotes around it.
                        This will mess up the string being passed to the database server. Haven't looked into it, but one option would be to drop the first and last quotes (bit of a cludge).


                        • #13
                          Re: filter a list via a session variable

                          I created a test case and have been messing with it. It definitely has something to do with how alpha is passing the argument into the sql query and quotes or something. I can't seem to get it to work even fudging it like Andy said. Even if you look at the SQL alpha is passing in when you use QBF syntax in a search field; for example: L773,A2674, All alpha does is turn it into a LIKE, AND LIKE statment instead of using "IN". There may be a setting somewhere that I'm unaware of to change how it works.

                          The other way to get around this is to set a filter after the grid is initialized using Xbasic. This is what I did with my code above; which does work. If you publish your session variable you can use it client side also which you can see in my code above: {grid.Object}.gridFilterSet(userfilter)
                          This type of filter can be removed by "clear search criteria" but you can also use {grid.Object}.gridBaseFilterSet(userfilter) which shouldn't be able to be cleared.