Can't write a property through ScriptingBridge

Question

Created Jun ’24

Replies 2

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Staring to use ScriptingBridge in Swift to enable faster scripting access to an external app (Devonthink) and therefore avoid having to use an AppleScript as a conduit to call a Swift command line utility and deal with its results.

The plan is to be able to read the plaintext of a record (no problem) and change the record name in Devonthink based on its contents. But I can’t seem to write to a property, instead getting an error “Cannot assign to property: ‘***’ is immutable”.

Any guidance how to get around this?

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Answer 1

DTS Engineer OP

Apple

Jun ’24

Can you write the same property with AppleScript?

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Answer 2

scpt OP

13h

How are attempting to set the property? And how are you defining the scripting API for DevonThink?

Assuming you've got the right API mapping, properties cannot be set directly — you have to use their corresponding setter method, e.g. setName(_ name: String).

For example:

let url = URL(fileURLWithPath: "/System/Volumes/Data/Applications/DEVONthink 3.app")
guard let application = SBApplication(url:url) else { return }
let devonThink = application as DevonThinkApplication
    
// Change name of the currently selected record
let currentRecord = devonThink.contentRecord
currentRecord?.setName?("new-name.md")

If that's not working, then the scripting API was defined incorrectly.

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