LostFound | Object-Relational Mapping library

I've got a form for updating a found item. The form extends Django's UpdateView through the views. The forms for updating a lost item and for updating a found item use the same template but have separate views and forms. They share the same template as majority of the fields are the same.

I am trying to add some custom form validation for the form for updating a found item in particular. This validation is specific to the found item and does not apply to a lost item. I have validation in a clean function in the FoundUpdateForm that checks to see if the needed conditions have been met and raises a ValidationError if a condition is not met. Even though there is validation here, I want to add it in a JavaScript file as well.

I've tried creating variables in the JavaScript file tied to the elements on the form but have been unsuccessful. I've tried using var staff_type = document.getElementById('staff_type'), var staff_type = document.getElementById('FoundUpdateForm').elements.namedItem('staff_type') and a few other variations of this. The main issue that I'm dealing with is how to grab the form when it does not have an ID. I've looked into assigning the form an ID in forms.py but from my findings at least it doesn't seem like it could be done this way.

I want to avoid adding to the template as much as possible because as mentioned before, this template is used by multiple forms. Additionally, because the form extends the UpdateView template, the template is able to use {{ form.as_p }} to render the fields for the form using p tags. Because the elements are rendered to the page this way, Django assigns them each their own ID, but the form itself is not assigned one.

forms.py:

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Here's my code...

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These are the two classes I have: Post User

I am populating all the information from the Posts class in a UICollectionView but since the username is in the User class my query is not working. Here's my code...

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Urls.py

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