Fixed #30388 -- Made inspectdb generate OneToOneFields rather than…

Fixed #30388 -- Made inspectdb generate OneToOneFields rather than ForeignKey(unique/primary_key=True).

django/core/management/commands/inspectdb.py

@@ -48,7 +48,7 @@ class Command(BaseCommand):
             yield "# You'll have to do the following manually to clean this up:"
             yield "#   * Rearrange models' order"
             yield "#   * Make sure each model has one field with primary_key=True"
-            yield "#   * Make sure each ForeignKey has `on_delete` set to the desired behavior."
+            yield "#   * Make sure each ForeignKey and OneToOneField has `on_delete` set to the desired behavior"
             yield (
                 "#   * Remove `managed = False` lines if you wish to allow "
                 "Django to create, modify, and delete the table"
@@ -116,14 +116,18 @@ class Command(BaseCommand):
                         extra_params['unique'] = True
 
                     if is_relation:
+                        if extra_params.pop('unique', False) or extra_params.get('primary_key'):
+                            rel_type = 'OneToOneField'
+                        else:
+                            rel_type = 'ForeignKey'
                         rel_to = (
                             "self" if relations[column_name][1] == table_name
                             else table2model(relations[column_name][1])
                         )
                         if rel_to in known_models:
-                            field_type = 'ForeignKey(%s' % rel_to
+                            field_type = '%s(%s' % (rel_type, rel_to)
                         else:
-                            field_type = "ForeignKey('%s'" % rel_to
+                            field_type = "%s('%s'" % (rel_type, rel_to)
                     else:
                         # Calling `get_field_type` to get the field type string and any
                         # additional parameters and notes.
@@ -153,7 +157,7 @@ class Command(BaseCommand):
                         '' if '.' in field_type else 'models.',
                         field_type,
                     )
-                    if field_type.startswith('ForeignKey('):
+                    if field_type.startswith(('ForeignKey(', 'OneToOneField(')):
                         field_desc += ', models.DO_NOTHING'
 
                     if extra_params:

tests/inspectdb/tests.py

@@ -152,11 +152,11 @@ class InspectDBTestCase(TestCase):
             output,
         )
         self.assertIn(
-            "people_pk = models.ForeignKey(InspectdbPeople, models.DO_NOTHING, primary_key=True)",
+            'people_pk = models.OneToOneField(InspectdbPeople, models.DO_NOTHING, primary_key=True)',
             output,
         )
         self.assertIn(
-            "people_unique = models.ForeignKey(InspectdbPeople, models.DO_NOTHING, unique=True)",
+            'people_unique = models.OneToOneField(InspectdbPeople, models.DO_NOTHING)',
             output,
         )