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I want a link that when you click on it, it will call a simple ajax query which updates a database entry. Normally this would be easy, but because authentication needs to happen before the query is executed, I need to be able to execute the Ajax Query AS THE CURRENTLY LOGGED IN USER. I.e. I need access to the $user variable and I don’t want to create a new connection.
Does Drupal have native functions that can do this? Is there something I can use to do this?
You’re going to want to create a module to handle this. Then, whatever function you call through the callback will have complete awareness of the logged in user.