Usually this would be done with a javascript function. You could display
the form but have the city field disabled until a state was chosen and then
(probably with an async call) populate the city field with a list of
relevant cities.
To just use server side validation for this you would have to
I have a form that has two fields (ModelChoiceField)
1. State
2. City
City and State from Spain.
How do to display only the cities of the state selected?
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