Ticket #29496: 29496.diff

tests/schema/models.py

@@ -12 +12 @@
     name = models.CharField(max_length=255)
     height = models.PositiveIntegerField(null=True, blank=True)
     weight = models.IntegerField(null=True, blank=True)
+    uuid = models.UUIDField(null=True)
 
     class Meta:
         apps = new_apps

tests/schema/tests.py

@@ -12 +12 @@
 from django.db.models.fields import (
     AutoField, BigAutoField, BigIntegerField, BinaryField, BooleanField,
     CharField, DateField, DateTimeField, IntegerField, PositiveIntegerField,
-    SlugField, TextField, TimeField,
+    SlugField, TextField, TimeField, UUIDField,
 )
 from django.db.models.fields.related import (
     ForeignKey, ForeignObject, ManyToManyField, OneToOneField,
@@ -603 +603 @@
         with connection.schema_editor() as editor:
             editor.alter_field(Author, old_field, new_field, strict=True)
 
+    def test_alter_nullable_uuid_to_primary_key(self):
+        # Create the table
+        with connection.schema_editor() as editor:
+            editor.create_model(Author)
+        # Change UUIDField to PrimaryKey
+        old_field = Author._meta.get_field('uuid')
+        new_field = UUIDField(primary_key=True)
+        new_field.set_attributes_from_name('uuid')
+        new_field.model = Author
+        with connection.schema_editor() as editor:
+            editor.remove_field(Author, Author._meta.get_field('id'))
+            editor.alter_field(Author, old_field, new_field, strict=True)
+
     def test_alter_text_field(self):
         # Regression for "BLOB/TEXT column 'info' can't have a default value")
         # on MySQL.