Excluded uploaded_at from the form #72
Fixed test to properly check if the student is enrolled at the subject of the assignment #72
Added clean method to catch cases when the student isn't enrolled at the subject of the assignment. Deleted useless validation for assignment #72
Changed from deprecated has_key to in statement #72
Removed unused imports #72
Used model_to_dict instead of creating the dictionary manually #72
Changed to form.errors from form._errors #72
Removed useless validation #72
Properly catch the error if the student doesn't exist #72
Custom method doesn't change cleaned_data #72
Deleted breakpoint #72