Gallery inside a component not showing data on first load

[chent7]

Hi all, 

I am stuck on this weird issue for 2 days and I really hope someone can unstuck me here...thanks in advanced! 

I built a reusable gallery component to display the BOM (bill of material) information for each work order(WOPRecord). Here is how my data structure looks like: 

{
    WorkOrderId: "M12345",
    Status: 0,
    IsUrgent: true,
    BOM: Table({
            PartNumber: "7815-sample",
            PartName: "Part name 1",
            AvailableInventory: 123,
            Coefficient: 1,
            BinNumber: "2A-1"
        },
        {
            PartNumber: "7816-sample",
            PartName: "Part Name 2",
            AvailableInventory: 456,
            Coefficient: 2,
            BinNumber: "2B-1"
        }      
    )
}

My cmpBOMWindow component has an input property WOPRecord of type record and an output property of IsVisible of type boolean. The dataSource of gallery inside the componet is set to cmpBOMWindow.WOPRecord.BOM. 

(image deleted)

On the screen, the component is triggered(shown) by clicking a button inside a gallery (displaying all the work orders). 

Here is where the problem is...everything works and shows fine until i close the window and reopen it again....the data no longer shows in the component gallery but will show again when i trigger another click. However, on my test lable, it shows that my data is presented there inside the gallery....it's just not showing and i don't think it's a visibility issue....

(image deleted)

Any idea, thought, comment is appreciated! 

[LuizVicente]

Hello. Let's find the problem together.
What is the code in the yellow circle click?

[chent7]

Great! Thank you @LuizVicente. 

My onSelect code for the button (which is placed on top of the yellow circle icon) is: 

Reset(cmpBOMWindow_1);UpdateContext({locSelectedRecord: ThisItem});

 locSelectedRecord is passed in as an input to the component: 

(image deleted)

Clicking the button triggers the Reset event of the component, which sets the IsVisible output variable of the component: 

Back to the screen, the component visible property is tied to the IsVisible output property:

To close the window again, the close (X) icon inside the component updates the locShowBOMWindow variable to false. 

Most of the codes here are for controling the visibility of the component. 

Thnaks! 

[chent7]

@LuizVicenteI made a test project with similar setup: a gallery on the screen with item button to trigger component which has a gallery inside to display nested data from the screen item record. 

However...everything works fine here...i don't know why it didn't work in my other project. Did you see any bad practice i made that might result in this weird bug? 

[LuizVicente]

I did a similar test too and it worked fine. It's certainly something in the component...

In the first click on the yellow circle (when no data is returned) did you check if the variable contains any information or is it blank?

[chent7]

Yes, in my test label below the gallery, it shows that the data is there. 

Yea...it's weird. I am still not sure where is wrong...i am dropping the component idea now and just paste the same code on every screen where i need the BOM window. Will refactor my code later and see if i can make the compoent works again. Thank you! 

[Anonymous]

I had a issue with a gallery like this aswell had to delete it and redo it and it worked. Don't ask me why at this point i've given up on the reliability of powerapps / studio. If smth doesn't work, first make a new screen/app test it and if its working just redo it. It sucks but well what can you do (well actually lastsubmit (its a form but well) giving such a issue on one project and deleting it will make everything a red mess but well i haven't given up on that one may we get lucky).

[chent7 · Accepted solution]

After a random trial and error, i finally got it working. Just an extra if statement set in the component WOPRecord (input) property. If the component is visible, set it to the selected item in the gallery, else reset it to blank. 

If(locShowBOMWindow, galStatusBoardData.Selected, Blank())

 Although i don't know why exactly, maybe let the gallery detect a change in the input property.