entity_id: is the id of the document or video.I would like to use just a single associative Author associative entity, like this: Each User can have none or more document or video. Each document or video can have one or more author. The relation represent the User who wrote the document or recorded the video. I'm trying to implement a relation between the entities Document and Video (actually there are many more, but for simplicity sake let's say are just two) and the User entity. I'm developing a custom content management system with Symfony 5 and Doctrine. Going to need a little bit more of the logic as it seems that you might have over complicated a simple process which is completely fine as it happens from time to time On another note you should switch to PDO as mysqli is not secure at all if you do not escape queries correctly. That would automatically do the same thing over and over for every user that submits the form. User Form -> User Inputs Data (Submits Form) -> ajax handles the posting to the php file -> let ajax wait for a response from php on success -> refresh the page using jquery. Have you tried using ajax in the mix between the form and user inputs ? Why do you need to re-generate the form using PHP ?.What happens to the page when the user inputs the data ? Then you re-create the form using PHP ?.When the user inputs data you store it in the db.You have a form with inputs (generated statically ?).I re-read your question twice and it boggles me: 'This all seems like a real headache, but I don't have anyone to ask about this, that's why I'm trying to push my luck in here.

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