How to reference GET data in a POST request?

Question

I am writing a POST request where a user tags a picture, therefore an instance of the Tagging table should be created. The picture is sent to the user through the GET request. How to I access for example the resource object that was sent through the GET request in the POST request so that I assign a Tag to a specific resource?

This is what I have tried so far:

views.py

        if not isinstance(request.user, CustomUser):
            current_user_id = 1
        else:
            current_user_id = request.user.pk

        random_resource = request.GET.data.get('resource')

        tag = request.data.get('tag')

        created = datetime.now()
        
        language = request.data.get('language')