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How to clear data from LIST controls

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  • How to clear data from LIST controls

    I have a UX with three linked list controls - so a Grandparent (Customers) - Parent (Header) - Child relationship (Details). Currently I am using a MSAccess Database as my data source. This will be a disconnected app. I had some issues with alpha not assigning the primary key in the Grandparent list. After lots of attempts to debug I finally decided to delete my MSAccess Table (with 34 records in it) and re-pasted the structure with no data. At that point the table worked great but it assigned the next (now first) customer CustomerID = 35. That I can accept and I expected as I did nothing to reset the CustomerID field. In WORKING preview the componet seems to be working properly.

    Then I try the component in the LIVE PREVIEW and the original data is all still there. How do I clear this data? Why is it still there?

    Thanks in advance

  • #2
    Re: How to clear data from LIST controls

    Maybe because it disconnected so it's coming from local storage.
    Insanity: doing the same thing over and over again and expecting different results.
    Albert Einstein, (attributed)
    US (German-born) physicist (1879 - 1955)

    Comment


    • #3
      Re: How to clear data from LIST controls

      Originally posted by peteconway View Post
      Maybe because it disconnected so it's coming from local storage.
      It is coming from disconnect storage - what I am trying to find out is how to clear the storage?

      Comment


      • #4
        Re: How to clear data from LIST controls

        Originally posted by PhotoHog View Post
        It is coming from disconnect storage - what I am trying to find out is how to clear the storage?
        Hi Darren,

        You may be interested in this video about Managing Local Storage: http://www.alphasoftware.com/video-library/?v=4475

        The List Control Documentation, referenced in the video, includes examples for deleting keys for a List control from local storage:
        Code:
        //delete all keys in local storage for other UX components
        var obj = {dialog.object}._ls_getData('o');
        {dialog.object}._ls_deleteKeys(obj);
        Good luck!
        Sarah Mitchell
        Director of Customer Success | Alpha Software Corporation
        Get in the know! Join us for our Weekly Webinars: TransForm Tuesday and Wednesday's Alpha Anywhere Demo and Q&A
        Connect with us: Instagram | Twitter | Facebook | LinkedIn | YouTube

        Comment


        • #5
          Re: How to clear data from LIST controls

          Thanks

          I was able to add the management control and delete the old data.

          Thanks

          Comment


          • #6
            Re: How to clear data from LIST controls

            Sarah,
            If I wanted to delete a specific list local storage key how would I go about that?

            Some variation of the below?

            function ticclear() {
            //delete local storage keys
            var obj = {dialog.object}._ls_getData('lists:t');
            {dialog.object}._ls_deleteKeys(obj.ALPHA_TICKET.LIST.TIC_LIST);
            //this clears the detail view
            var lObj = {dialog.object}.getControl('TIC_LIST');
            lObj.newDetailViewRecord();
            }

            Thanks

            Comment


            • #7
              Re: How to clear data from LIST controls

              I figured this one out from some earlier work...too easy I guess.

              You can clear local storage from a specific list as follows:

              localStorage.removeItem('ALPHA_NAMESPACE.LIST.LISTNAME');

              ALPHA = standard prefix

              NAMESPACE = the local storage namespace you assigned in UX properties.

              LIST = specifies it is local storage from a list.

              LISTNAME = the variable name of your actual list.


              My corrected function:

              function tlClear() {
              //delete local storage keys
              localStorage.removeItem('Alpha_TICKET.LIST.tic_list');
              var lObj = {dialog.object}.getControl('TIC_LIST');
              lObj.newDetailViewRecord();
              {dialog.object}.refreshListData('tic_list');
              }

              Hope this helps others...

              Comment

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