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(help) change return value 'undefined' in FormView field using lookup

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    (help) change return value 'undefined' in FormView field using lookup

    I build a formview with lookup value in every field because I want to display name value rather than id value (data source is numeric type)
    12-09-2019_215648_CaptureImage.jpg

    my problem is when the data source value is empty, it looks like the lookup will return with 'undefined' as a value.
    how to make the field display no value or still empty instead of undefined? it that possible?
    12-09-2019_215604_CaptureImage.jpg

    #2
    Re: (help) change return value 'undefined' in FormView field using lookup

    please send a test case and we will show you how to do it, or if it is not possible now, we can add a feature to the formview to make it possible

    Comment


      #3
      Re: (help) change return value 'undefined' in FormView field using lookup

      Originally posted by Selwyn Rabins View Post
      please send a test case and we will show you how to do it, or if it is not possible now, we can add a feature to the formview to make it possible
      thanks for sending in your test case
      we have made a change to the way lookups are implemented in the FormView.
      in your case, you have a lookup field, that is empty (in your case the lookup value appears to be "0" for the missing data) and currently the lookup logic returns 'undefined' if a lookup match was not found.
      the change we made is that if the lookup field is empty we now return a value of blank (rather than undefined).
      undefined is now only returned if the lookup value is not empty and the lookup source does not have a match

      however, you can get the result you want with the existing build you are using by changing the lookup type to "function" (from the current setting of "list")
      once you do this you have complete control over how the lookup works.
      here is a sample of how you might define the lookup function for one of your lookups

      function lookup3(data) {
      if(data == 0) return '';
      var _d = {dialog.object}.getControl('listcaptain')
      for(var i = 0; i < _d.lenth; i++) {
      if(_d[i].ID == data) return _d[i].Fullname

      }

      return 'undefined'

      }

      Comment


        #4
        Re: (help) change return value 'undefined' in FormView field using lookup

        Glad to hear this feature will be in the next build, will more helpful and easier if this function is set in the lookup properties. Thank you very much Selwyn!

        Comment


          #5
          Re: (help) change return value 'undefined' in FormView field using lookup

          i am afraid i don't understand the point you are making. the lookup feature offers two options. 1) use a list as the lookup source or 2) a custom option where you can write you own javascript function and completely control how the lookup is performed and what data is returned by the lookup.

          are you saying that if you choose the custom option you would like to be able to define the custom javascript function in the form builder ? if so, then you can. the form builder has a "javascript" tab.

          Comment


            #6
            Re: (help) change return value 'undefined' in FormView field using lookup

            Originally posted by Selwyn Rabins View Post
            we have made a change to the way lookups are implemented in the FormView.

            the change we made is that if the lookup field is empty we now return a value of blank (rather than undefined).
            undefined is now only returned if the lookup value is not empty and the lookup source does not have a match

            however, you can get the result you want with the existing build you are using by changing the lookup type to "function" (from the current setting of "list")
            I'm talking about this.
            My understanding is that alpha will make change in the next build to change the return value (using blank value rather than undefined) when use list for lookup source, so it will more easier and helpful no need use custom function

            Sorry make you confused, my english is bad , but Thanks again for this.

            Comment

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