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Parent List in List Builder on UX

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  • Parent List in List Builder on UX

    I'm trying to figure out how this functionality works. You have the option to designate a parent list object and setting which list it is in the List Builder dialog when adding a list object on a UX. On my UX I'm trying to setup a second list for the child table that whose parent is displayed on the first list. When I go to close the List Builder dialog, it says I need to tell it what to filter on from the first list. The filter doesn't give me any options other than the fields in the child list, so I created an argument, but you can only set that to initialize at run time. And it doesn't seem to get set when I change the selection in the parent list object, I'm assuming because setting the argument isn't connected to the event handling the selection change.

    I have an alternate way around this, but thought I could use this built in functionality. The two tables are connected in the sql database. The only documentation I've been able to find on this is http://www.alphasoftware.com/documen...ail%20View.xml

    and my List Builder does not have the Linking Fields property. The documentation doesn't have a date or build number, so I can't tell if/when it was removed or added to the software functionality. Anybody else have success in linking two list objects in a parent/child relationship on a UX?

  • #2
    Re: Parent List in List Builder on UX

    I've changed up my google search a bit and managed to find more information on how to filter child lists.

    http://alphaanywherevideos.blogspot.com/

    The one difference I found with what the alpha videos/transcripts go into is that I'm using a detail view to enter new records on the first list (Parent) and my only option is to return the primary key in that table. The examples on the webpage all show setting the list return to a specific field in the list object. I've tried setting my argument to the return of the list, but it doesn't seem to be taking. Like I mentioned in my previous post, I have another way, which is to use action javascript to populate the list control from events in the first list. I was just trying to branch out by using this option in the list. If anybody has any insight into this or a better method, it would still be appreciated.

    Comment


    • #3
      Re: Parent List in List Builder on UX

      Found the linking fields. In the documentation you didn't need to check the "Pre-Load Data" box, but when I checked it, it gave me the linking fields option. The reason I didn't click this before is because I wasn't creating my UX for disconnected operation, which is what the documentation said it was for. Guess this is resolved now, need more documentation.

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      • #4
        Re: Parent List in List Builder on UX

        Keith, you don't need to pre-load the data. That's more for disconnected mobile.

        You don't report what version/build of Alpha you're working with.

        Set your Parent List to return the Primary Key.

        Even though Arguments are Global for the UX (UX Properties) you can access all Arguments (and the builder) from each List Control. So... pop into your Child List and set up an Argument with the correct data type, set it to "Set value at Run-time" and select the Value as your Parent List. My Argument is named argCustId and it's value is my Parent List... {LISTPARENT}.

        Next, still in the Child List, if the Filter property is showing on the Data Source tab, build your filter... e.g.

        Code:
        CustId = :argCustId
        If the Filter property is not showing then add a Where clause into your SQL Statement... e.g.

        Code:
        SELECT InvId, CustId, InvoiceNbr, InvoiceAmt 
        FROM tblcustomerinvoices 
        WHERE CustId = :argCustId
        In the Child List Data Source Tab, make sure Has Parent List is checked and you've selected your Parent List Id. You do not need to check "Pre-load data".

        That's it. No other code needed. When a Parent row is selected your Child List will filter.

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        • #5
          Re: Parent List in List Builder on UX

          Thanks David, I redid this and it is working. Not sure why it didn't work for me before because I had done exactly as you responded. The only thing I can think of is I may have selected rows that didn't have any child data? I was feeling out of it yesterday, so it's possible.

          The one confusing thing was the documentation I linked to clearly shows the linking fields in the builder without checking the pre-load button.

          Thanks Again!

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