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Plus and minus buttons to update column from AddColumns function

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Posted on by karik

Dear PowerApps Experts,

I have a problem with my shopping cart, because I want to update values when I select a monitor to pick it to the cart, I want to UPDATE QUANTITY value, if I select 1 monitor to the cart, QUANTITY should be substracted minus 1, for example from 19 to 18.

This is my items function from the Gallery - Qty is added from AddColumns function:

Filter(
 AddColumns(
 GroupBy(
 Sprzęt;
 Marka;
 Model;
 Cena;
 Dostępne;
 Description;
 _byModel
 );
 Image;
 Model; Qty; CountRows(_byModel)
 );
 ThisRecord.Dost_x0119_pne = true
)

So the question is: how can I update QUANTITY Text value from 19 to 18 when I pick item to the cart?

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Building Power Apps

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anandm08 1,936 Super User 2024 Season 2 on at

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hi @karik ,
Use the Patch function to update the quantity in your data source.

Patch( Sprzęt, ThisItem, { Dostępne: ThisItem.Dostępne - 1 } )

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karik 47 on at

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@anandm08 unfortunately that's not working. "Dostępne" column is a boolean (it means "Available" - true/false)

Type "Image" of this argument does not fit to expected type "Record". Found type "Text".

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