We're going for solution 0 friends!

django/django#19110 (comment)

Author: jpic

docs/gfk.rst

@@ -30,13 +30,12 @@ Consider such a model:
         )
 
         location = GenericForeignKey('content_type', 'object_id')
+        # required for django 5.1
+        location.editable = True
 
         def __str__(self):
             return self.name
 
-    # DJANGO 5.1
-    TestModel.location.editable = True
-
 .. danger::
 
     Django 5.1 cleanup breaks this https://code.djangoproject.com/ticket/35224

test_project/select2_generic_foreign_key/models.py

@@ -21,6 +21,7 @@ class TModel(models.Model):
     )
 
     test = GenericForeignKey('content_type', 'object_id')
+    test.editable = True
 
     content_type2 = models.ForeignKey(
         'contenttypes.ContentType',
@@ -38,6 +39,7 @@ class TModel(models.Model):
     )
 
     test2 = GenericForeignKey('content_type2', 'object_id2')
+    test2.editable = True
 
     for_inline = models.ForeignKey(
         'self',
@@ -50,11 +52,6 @@ class TModel(models.Model):
     def __str__(self):
         return self.name
 
-# For Django 5.1
-# See https://code.djangoproject.com/ticket/36151
-TModel._meta.get_field('test').editable = True
-TModel._meta.get_field('test2').editable = True
-
 
 class TProxyModel(TModel):
     class Meta: