You are very wrong, but you can't expect help without you giving vital info about your app.
I think your problem is quite simple, but without a proper explanation we can't do much.
Your OP was anything but complex, it was vague, telling us to get a value from the URL, which is not possible. Eventhough you are seeing a detail view for table 1, you want to run an action on table 2, because what you see at the bottom is an embeded inline view of table 2
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