Fixed #7565 -- Fixed a problem with PostgreSQL sequence resetting in loaddata.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7789 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/postgresql/operations.py

@@ -97,7 +97,7 @@ class DatabaseOperations(BaseDatabaseOperations):
             # Use `coalesce` to set the sequence for each model to the max pk value if there are records,
             # or 1 if there are none. Set the `is_called` property (the third argument to `setval`) to true
             # if there are records (as the max pk value is already in use), otherwise set it to false.
-            for f in model._meta.fields:
+            for f in model._meta.local_fields:
                 if isinstance(f, models.AutoField):
                     output.append("%s setval('%s', coalesce(max(%s), 1), max(%s) %s null) %s %s;" % \
                         (style.SQL_KEYWORD('SELECT'),

tests/regressiontests/fixtures_regress/fixtures/model-inheritance.json

@@ -0,0 +1,4 @@
+[
+    {"pk": 1, "model": "fixtures_regress.parent", "fields": {"name": "fred"}},
+    {"pk": 1, "model": "fixtures_regress.child", "fields": {"data": "apple"}}
+]

tests/regressiontests/fixtures_regress/models.py

@@ -38,6 +38,12 @@ class Absolute(models.Model):
         super(Absolute, self).__init__(*args, **kwargs)
         Absolute.load_count += 1
 
+class Parent(models.Model):
+    name = models.CharField(max_length=10)
+
+class Child(Parent):
+    data = models.CharField(max_length=10)
+
 
 __test__ = {'API_TESTS':"""
 >>> from django.core import management
@@ -94,4 +100,11 @@ No fixture data found for 'bad_fixture2'. (File format may be invalid.)
 
 >>> sys.stderr = savestderr
 
+###############################################
+# Test for ticket #7565 -- PostgreSQL sequence resetting checks shouldn't
+# ascend to parent models when inheritance is used (since they are treated
+# individually).
+
+>>> management.call_command('loaddata', 'model-inheritance.json', verbosity=0)
+
 """}