Fixed #15926 -- Added option --no-initial-data to syncdb and flush.

Thanks msiedlarek, jpaugh64 and vlinhart!

tests/modeltests/fixtures_model_package/tests.py

@@ -20,6 +20,60 @@ class SampleTestCase(TestCase):
         )
 
 
+class TestNoInitialDataLoading(TestCase):
+    def test_syncdb(self):
+        Book.objects.all().delete()
+
+        management.call_command(
+            'syncdb',
+            verbosity=0,
+            commit=False
+        )
+        self.assertQuerysetEqual(
+            Book.objects.all(), [
+                u'Achieving self-awareness of Python programs'
+            ],
+            lambda a: a.name
+        )
+
+        Book.objects.all().delete()
+
+        management.call_command(
+            'syncdb',
+            verbosity=0,
+            commit=False,
+            load_initial_data=False
+        )
+        self.assertQuerysetEqual(Book.objects.all(), [])
+
+    def test_flush(self):
+        Book.objects.all().delete()
+
+        management.call_command(
+            'flush',
+            verbosity=0,
+            interactive=False,
+            commit=False
+        )
+        self.assertQuerysetEqual(
+            Book.objects.all(), [
+                u'Achieving self-awareness of Python programs'
+            ],
+            lambda a: a.name
+        )
+
+        Book.objects.all().delete()
+
+        management.call_command(
+            'flush',
+            verbosity=0,
+            commit=False,
+            interactive=False,
+            load_initial_data=False
+        )
+        self.assertQuerysetEqual(Book.objects.all(), [])
+
+
 class FixtureTestCase(TestCase):
     def test_initial_data(self):
         "Fixtures can load initial data into models defined in packages"