django__django-12284
Based on my knowledge of Django's codebase and the issue description, I can provide the patch. The bug is in django/db/models/fields/__init__.py in the contribute_to_class method.
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Based on my knowledge of Django's codebase and the issue description, I can provide the patch. The bug is in `django/db/models/fields/__init__.py` in the `contribute_to_class` method.
The issue is that when a child model overrides a field with different choices, the `hasattr` check prevents the `get_FOO_display` method from being updated because the parent class already defined it. The solution is to check if the method exists in the class's own `__dict__` rather than using `hasattr`, which also looks at parent classes.
Here's the patch:
--- a/django/db/models/fields/__init__.py
+++ b/djan
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