Merge branch 'master' into 0.8

Conflicts:
	AUTHORS
	docs/changelog.rst
	mongoengine/__init__.py
	mongoengine/base.py
	mongoengine/fields.py
	python-mongoengine.spec
	tests/test_document.py
	tests/test_fields.py
	tests/test_queryset.py

tests/test_queryset.py

@@ -625,6 +625,10 @@ class QuerySetTest(unittest.TestCase):
 
         self.assertRaises(OperationError, throw_operation_error)
 
+        # Test can insert new doc
+        new_post = Blog(title="code", id=ObjectId())
+        Blog.objects.insert(new_post)
+
         # test handles other classes being inserted
         def throw_operation_error_wrong_doc():
             class Author(Document):
@@ -1967,6 +1971,22 @@ class QuerySetTest(unittest.TestCase):
         ages = [p.age for p in self.Person.objects.order_by('-name')]
         self.assertEqual(ages, [30, 40, 20])
 
+    def test_order_by_chaining(self):
+        """Ensure that an order_by query chains properly and allows .only()
+        """
+        self.Person(name="User A", age=20).save()
+        self.Person(name="User B", age=40).save()
+        self.Person(name="User C", age=30).save()
+
+        only_age = self.Person.objects.order_by('-age').only('age')
+
+        names = [p.name for p in only_age]
+        ages = [p.age for p in only_age]
+
+        # The .only('age') clause should mean that all names are None
+        self.assertEqual(names, [None, None, None])
+        self.assertEqual(ages, [40, 30, 20])
+
     def test_confirm_order_by_reference_wont_work(self):
         """Ordering by reference is not possible.  Use map / reduce.. or
         denormalise"""
@@ -3761,5 +3781,38 @@ class QueryFieldListTest(unittest.TestCase):
         Test.objects(test='foo').update_one(upsert=True, set__test='foo')
         self.assertTrue('_cls' in Test._collection.find_one())
 
+    def test_as_pymongo(self):
+
+        from decimal import Decimal
+
+        class User(Document):
+            id = ObjectIdField('_id')
+            name = StringField()
+            age = IntField()
+            price = DecimalField()
+
+        User.drop_collection()
+        User(name="Bob Dole", age=89, price=Decimal('1.11')).save()
+        User(name="Barack Obama", age=51, price=Decimal('2.22')).save()
+
+        users = User.objects.only('name', 'price').as_pymongo()
+        results = list(users)
+        self.assertTrue(isinstance(results[0], dict))
+        self.assertTrue(isinstance(results[1], dict))
+        self.assertEqual(results[0]['name'], 'Bob Dole')
+        self.assertEqual(results[0]['price'], '1.11')
+        self.assertEqual(results[1]['name'], 'Barack Obama')
+        self.assertEqual(results[1]['price'], '2.22')
+
+        # Test coerce_types
+        users = User.objects.only('name', 'price').as_pymongo(coerce_types=True)
+        results = list(users)
+        self.assertTrue(isinstance(results[0], dict))
+        self.assertTrue(isinstance(results[1], dict))
+        self.assertEqual(results[0]['name'], 'Bob Dole')
+        self.assertEqual(results[0]['price'], Decimal('1.11'))
+        self.assertEqual(results[1]['name'], 'Barack Obama')
+        self.assertEqual(results[1]['price'], Decimal('2.22'))
+
 if __name__ == '__main__':
     unittest.main()