I am working on an app where I have a product list stored in SP containing 2 columns. Code and Name.
I have pulled data into Gallery and added 1 more Custom Field name for Qty.
I have added a checkbox on Gallery item to let people choose the product they want.
OnCheck property of Checkbox I am creating a collection which have Code, Name and Qty in it which is then is pulled in Data table on my ordering page with other customer details. I have given a button to add/edit the quantity which takes user back to product page with check box and qty text field. There I have tried to add update function on ONCHANGE of Qty text field to update the collection but having errors. Most approaches I have used are giving evaluation error "formula uses scope which is not presently supported for evaluation".
Flow of the application is as below.
Open Ordering Form > Choose Add/Edit products > Check the Checkbox for products to order > OnCheck create Collection to add selected item into collection & create another collection to compare Auto Hide function for Qty text field. i.e. if thisitem is in collection show Qty Field, if not Hide Qty Field.. > if user wants to change Qty, Onchange event update new Qty in collection. (problem underdiscussion)