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Diffstat (limited to 'tests')
| -rw-r--r-- | tests/modeltests/expressions/models.py | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tests/modeltests/expressions/models.py b/tests/modeltests/expressions/models.py index 27daabad71..b515682a9c 100644 --- a/tests/modeltests/expressions/models.py +++ b/tests/modeltests/expressions/models.py @@ -56,6 +56,16 @@ __test__ = {'API_TESTS': """ >>> company_query [{'num_chairs': 2302, 'name': u'Example Inc.', 'num_employees': 2300}, {'num_chairs': 5, 'name': u'Foobar Ltd.', 'num_employees': 3}, {'num_chairs': 34, 'name': u'Test GmbH', 'num_employees': 32}] +# Law of order of operations is followed +>>> _ =company_query.update(num_chairs=F('num_employees') + 2 * F('num_employees')) +>>> company_query +[{'num_chairs': 6900, 'name': u'Example Inc.', 'num_employees': 2300}, {'num_chairs': 9, 'name': u'Foobar Ltd.', 'num_employees': 3}, {'num_chairs': 96, 'name': u'Test GmbH', 'num_employees': 32}] + +# Law of order of operations can be overridden by parentheses +>>> _ =company_query.update(num_chairs=((F('num_employees') + 2) * F('num_employees'))) +>>> company_query +[{'num_chairs': 5294600, 'name': u'Example Inc.', 'num_employees': 2300}, {'num_chairs': 15, 'name': u'Foobar Ltd.', 'num_employees': 3}, {'num_chairs': 1088, 'name': u'Test GmbH', 'num_employees': 32}] + # The relation of a foreign key can become copied over to an other foreign key. >>> Company.objects.update(point_of_contact=F('ceo')) 3 |