How to guarantee integer is parsed as string in props

Ignition
1

I have a Tree component in Perspective with a JSON structure where each subtree is labelled with its index.

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The selection parameter in the Tree component controls which subtree is clicked during the Perspective session. This parameter selects the subtree by containing the subtree's index (ex. selection: 0/0/1/0.)

I want to add an onStartup event to the Tree component that automatically selects the root of the Tree component by setting selection:0, where 0 is a string, since selection can only accept strings as values. However, when the event sets selection: 0, Ignition immediately assumes that 0 must be an integer, which throws an error on the selection property (integer found, string expected.)

How can I get the props on the Tree component to accept 0 as a string? I've tried self.props.selection[0] = '0' and self.props.selection[0] = str(0) in the onStartup script, but Ignition seems to immediately register 0 as an integer.

2

I am not seeing the same issue on my end. If I add a tree with a startup script that sets self.props.selection[0] to either the string literal or 0 casted to a string it seems to work fine and treat the value as a string.

I only get the error you are describing when I set the value as an integer.

Just in case it is an issue that was fixed I am on version 8.1.39

3

Wherever selection is being used, can you cast it to string there to get rid of the type error?