Update loaddata.py

django/core/management/commands/loaddata.py

@@ -186,7 +186,7 @@ def find_fixtures(self, fixture_label):
             fixture_name = os.path.basename(fixture_name)
         else:
             fixture_dirs = self.fixture_dirs
-            if os.path.sep in fixture_name:
+            if os.path.sep in os.path.normpath(fixture_name):
                 fixture_dirs = [os.path.join(dir_, os.path.dirname(fixture_name))
                                 for dir_ in fixture_dirs]
                 fixture_name = os.path.basename(fixture_name)

tests/fixtures_regress/tests.py

@@ -34,6 +34,26 @@
 _cur_dir = os.path.dirname(os.path.abspath(upath(__file__)))
 
 
+class TestLoadFixtureFromOtherAppDirectory(TestCase):
+    """
+    This test should only fail on Windows when specifying a fixture in a
+    directory outside of the current app module. The fixture loader checks
+    the `fixture_name` for os.path.sep, which on Windows is `\`.
+
+    When specifying a path with forward slashes, the fixture will not be loaded,
+    as the path separator doesn't exist. The other unit tests for fixture
+    loading pass because they use os.path.join, not a hard-coded path, so
+    os.path.sep matches.
+    """
+
+    fixtures = ['fixtures_regress/fixtures/absolute.json']
+
+    def test_fixtures_loaded(self):
+        absolute_count = Absolute.objects.count()
+        self.assertGreater(absolute_count, 0, "Absolute models not loaded from "
+            "fixtures.")
+
+
 class TestFixtures(TestCase):
 
     def animal_pre_save_check(self, signal, sender, instance, **kwargs):