5. How to make a field editable while creating, but read only in existing objects?¶
You need to make the
category read only once a
Hero is created. However duing the first write the fields needs to be editable.
You can do this by overriding
get_readonly_fields method, like this:
def get_readonly_fields(self, request, obj=None): if obj: return ["name", "category"] else: return 
None during the object creation, but set to the object being edited during an edit.