[1.8.x] Fixed #24892 -- Fixed quoting of SQL when renaming a field to AutoField in PostgreSQL

Backport of 5ab8680983 from master

django/db/backends/postgresql_psycopg2/schema.py

@@ -52,31 +52,31 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
                 [
                     (
                         self.sql_delete_sequence % {
-                            "sequence": sequence_name,
+                            "sequence": self.quote_name(sequence_name),
                         },
                         [],
                     ),
                     (
                         self.sql_create_sequence % {
-                            "sequence": sequence_name,
+                            "sequence": self.quote_name(sequence_name),
                         },
                         [],
                     ),
                     (
                         self.sql_alter_column % {
-                            "table": table,
+                            "table": self.quote_name(table),
                             "changes": self.sql_alter_column_default % {
-                                "column": column,
-                                "default": "nextval('%s')" % sequence_name,
+                                "column": self.quote_name(column),
+                                "default": "nextval('%s')" % self.quote_name(sequence_name),
                             }
                         },
                         [],
                     ),
                     (
                         self.sql_set_sequence_max % {
-                            "table": table,
-                            "column": column,
-                            "sequence": sequence_name,
+                            "table": self.quote_name(table),
+                            "column": self.quote_name(column),
+                            "sequence": self.quote_name(sequence_name),
                         },
                         [],
                     ),

docs/releases/1.8.3.txt

@@ -31,3 +31,6 @@ Bugfixes
 
 * Fixed a crash when using a reverse one-to-one relation in
   ``ModelAdmin.list_display`` (:ticket:`24851`).
+
+* Fixed quoting of SQL when renaming a field to ``AutoField`` in PostgreSQL
+  (:ticket:`24892`).

tests/schema/models.py

@@ -80,6 +80,14 @@ class BookWithSlug(models.Model):
         db_table = "schema_book"
 
 
+class IntegerPK(models.Model):
+    i = models.IntegerField(primary_key=True)
+
+    class Meta:
+        apps = new_apps
+        db_table = "INTEGERPK"  # uppercase to ensure proper quoting
+
+
 class Note(models.Model):
     info = models.TextField()
 

tests/schema/tests.py

@@ -8,8 +8,8 @@ from django.db import (
 )
 from django.db.models import Model
 from django.db.models.fields import (
-    BigIntegerField, BinaryField, BooleanField, CharField, DateTimeField,
-    IntegerField, PositiveIntegerField, SlugField, TextField,
+    AutoField, BigIntegerField, BinaryField, BooleanField, CharField,
+    DateTimeField, IntegerField, PositiveIntegerField, SlugField, TextField,
 )
 from django.db.models.fields.related import (
     ForeignKey, ManyToManyField, OneToOneField,
@@ -20,8 +20,8 @@ from django.test import TransactionTestCase, skipIfDBFeature
 from .fields import CustomManyToManyField, InheritedManyToManyField
 from .models import (
     Author, AuthorWithDefaultHeight, AuthorWithEvenLongerName, Book, BookWeak,
-    BookWithLongName, BookWithO2O, BookWithSlug, Note, NoteRename, Tag,
-    TagIndexed, TagM2MTest, TagUniqueRename, Thing, UniqueTest, new_apps,
+    BookWithLongName, BookWithO2O, BookWithSlug, IntegerPK, Note, NoteRename,
+    Tag, TagIndexed, TagM2MTest, TagUniqueRename, Thing, UniqueTest, new_apps,
 )
 
 
@@ -38,8 +38,8 @@ class SchemaTests(TransactionTestCase):
 
     models = [
         Author, AuthorWithDefaultHeight, AuthorWithEvenLongerName, Book,
-        BookWeak, BookWithLongName, BookWithO2O, BookWithSlug, Note, Tag,
-        TagIndexed, TagM2MTest, TagUniqueRename, Thing, UniqueTest,
+        BookWeak, BookWithLongName, BookWithO2O, BookWithSlug, IntegerPK, Note,
+        Tag, TagIndexed, TagM2MTest, TagUniqueRename, Thing, UniqueTest,
     ]
 
     # Utility functions
@@ -729,6 +729,22 @@ class SchemaTests(TransactionTestCase):
         # field which drops the id sequence, at least on PostgreSQL.
         Author.objects.create(name='Foo')
 
+    def test_alter_int_pk_to_autofield_pk(self):
+        """
+        Should be able to rename an IntegerField(primary_key=True) to
+        AutoField(primary_key=True).
+        """
+        with connection.schema_editor() as editor:
+            editor.create_model(IntegerPK)
+
+        old_field = IntegerPK._meta.get_field('i')
+        new_field = AutoField(primary_key=True)
+        new_field.model = IntegerPK
+        new_field.set_attributes_from_name('i')
+
+        with connection.schema_editor() as editor:
+            editor.alter_field(IntegerPK, old_field, new_field, strict=True)
+
     def test_rename(self):
         """
         Tests simple altering of fields