Remove automagic pk-based sequence setup

Related to issues #78, #92, #103, #111, #153, #170

The default value of all sequences is now 0; the automagic
``_setup_next_sequence`` behavior of Django/SQLAlchemy has been removed.

This feature's only goal was to allow the following scenario:

1. Run a Python script that uses MyFactory.create() a couple of times
   (with a unique field based on the sequence counter)
2. Run the same Python script a second time

Without the magical ``_setup_next_sequence``, the Sequence counter would be set
to 0 at the beginning of each script run, so both runs would generate objects
with the same values for the unique field ; thus conflicting and crashing.

The above behavior having only a very limited use and bringing various
issues (hitting the database on ``build()``, problems with non-integer
or composite primary key columns, ...), it has been removed.

It could still be emulated through custom ``_setup_next_sequence``
methods, or by calling ``MyFactory.reset_sequence()``.

1 files changed, 7 insertions, 13 deletions

diff --git a/tests/test_using.py b/tests/test_using.py
index 8d78789..8aba8b6 100644
--- a/tests/test_using.py
+++ b/tests/test_using.py
@@ -1490,12 +1490,6 @@ class BetterFakeModelManager(object):
         instance.id = 2
         return instance, True
 
-    def values_list(self, *args, **kwargs):
-        return self
-
-    def order_by(self, *args, **kwargs):
-        return [1]
-
 
 class BetterFakeModel(object):
     @classmethod
@@ -1618,14 +1612,14 @@ class DjangoModelFactoryTestCase(unittest.TestCase):
         o1 = TestModelFactory()
         o2 = TestModelFactory()
 
-        self.assertEqual('foo_2', o1.a)
-        self.assertEqual('foo_3', o2.a)
+        self.assertEqual('foo_0', o1.a)
+        self.assertEqual('foo_1', o2.a)
 
         o3 = TestModelFactory.build()
         o4 = TestModelFactory.build()
 
-        self.assertEqual('foo_4', o3.a)
-        self.assertEqual('foo_5', o4.a)
+        self.assertEqual('foo_2', o3.a)
+        self.assertEqual('foo_3', o4.a)
 
     def test_no_get_or_create(self):
         class TestModelFactory(factory.django.DjangoModelFactory):
@@ -1636,7 +1630,7 @@ class DjangoModelFactoryTestCase(unittest.TestCase):
 
         o = TestModelFactory()
         self.assertEqual(None, o._defaults)
-        self.assertEqual('foo_2', o.a)
+        self.assertEqual('foo_0', o.a)
         self.assertEqual(2, o.id)
 
     def test_get_or_create(self):
@@ -1652,7 +1646,7 @@ class DjangoModelFactoryTestCase(unittest.TestCase):
 
         o = TestModelFactory()
         self.assertEqual({'c': 3, 'd': 4}, o._defaults)
-        self.assertEqual('foo_2', o.a)
+        self.assertEqual('foo_0', o.a)
         self.assertEqual(2, o.b)
         self.assertEqual(3, o.c)
         self.assertEqual(4, o.d)
@@ -1672,7 +1666,7 @@ class DjangoModelFactoryTestCase(unittest.TestCase):
 
         o = TestModelFactory()
         self.assertEqual({}, o._defaults)
-        self.assertEqual('foo_2', o.a)
+        self.assertEqual('foo_0', o.a)
         self.assertEqual(2, o.b)
         self.assertEqual(3, o.c)
         self.assertEqual(4, o.d)