[2.2.x] Fixed #30931 -- Restored ability to override Model.get_FIELD_display().

Thanks Sergey Fedoseev for the implementation idea.

Regression in a68ea231012434b522ce45c513d84add516afa60.

Backport of 2d38eb0ab9f78d68c083a5b78b1eca39027b279a from master

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/model_fields/tests.py b/tests/model_fields/tests.py
index 9e38f0fcf0..7a26fe01e5 100644
--- a/tests/model_fields/tests.py
+++ b/tests/model_fields/tests.py
@@ -114,6 +114,16 @@ class ChoicesTests(SimpleTestCase):
         self.assertIsNone(Whiz(c=None).get_c_display())         # Blank value
         self.assertEqual(Whiz(c='').get_c_display(), '')        # Empty value
 
+    def test_overriding_FIELD_display(self):
+        class FooBar(models.Model):
+            foo_bar = models.IntegerField(choices=[(1, 'foo'), (2, 'bar')])
+
+            def get_foo_bar_display(self):
+                return 'something'
+
+        f = FooBar(foo_bar=1)
+        self.assertEqual(f.get_foo_bar_display(), 'something')
+
     def test_iterator_choices(self):
         """
         get_choices() works with Iterators.