[1.11.x] Fixed #28597 -- Fixed crash with the name of a model's autogenerated primary key in an Index's fields.

Backport of fb02ebe889eee292144f9157ed4ddcdcc139eba9 from master

1 files changed, 7 insertions, 6 deletions

diff --git a/django/db/models/base.py b/django/db/models/base.py
index 5067fb9e4f..cf8f44919c 100644
--- a/django/db/models/base.py
+++ b/django/db/models/base.py
@@ -306,12 +306,6 @@ class ModelBase(type):
         # Copy indexes so that index names are unique when models extend an
         # abstract model.
         new_class._meta.indexes = [copy.deepcopy(idx) for idx in new_class._meta.indexes]
-        # Set the name of _meta.indexes. This can't be done in
-        # Options.contribute_to_class() because fields haven't been added to
-        # the model at that point.
-        for index in new_class._meta.indexes:
-            if not index.name:
-                index.set_name_with_model(new_class)
 
         if abstract:
             # Abstract base models can't be instantiated and don't appear in
@@ -371,6 +365,13 @@ class ModelBase(type):
             manager.auto_created = True
             cls.add_to_class('objects', manager)
 
+        # Set the name of _meta.indexes. This can't be done in
+        # Options.contribute_to_class() because fields haven't been added to
+        # the model at that point.
+        for index in cls._meta.indexes:
+            if not index.name:
+                index.set_name_with_model(cls)
+
         class_prepared.send(sender=cls)
 
     def _requires_legacy_default_manager(cls):  # RemovedInDjango20Warning