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Made prefetch_related SQL inspection tests less brittle. 

After refs #16614, integers might appear outside the WHERE clause.
This commit is contained in:
François Freitag 2016-11-19 19:14:37 -08:00 committed by Tim Graham
parent e5e3747357
commit ee1c1c696b
1 changed files with 10 additions and 3 deletions
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13
tests/prefetch_related/tests.py
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@ -44,6 +44,13 @@ class PrefetchRelatedTests(TestCase):
cls.reader1.books_read.add(cls.book1, cls.book4)
cls.reader2.books_read.add(cls.book2, cls.book4)
def assertWhereContains(self, sql, needle):
where_idx = sql.index('WHERE')
self.assertEqual(
sql.count(str(needle), where_idx), 1,
msg="WHERE clause doesn't contain %s, actual SQL: %s" % (needle, sql[where_idx:])
)
def test_m2m_forward(self):
with self.assertNumQueries(2):
lists = [list(b.authors.all()) for b in Book.objects.prefetch_related('authors')]
@ -238,21 +245,21 @@ class PrefetchRelatedTests(TestCase):
list(Book.objects.prefetch_related('authors__addresses'))
sql = queries[-1]['sql']
self.assertEqual(sql.count(self.author1.name), 1)
self.assertWhereContains(sql, self.author1.name)
def test_m2m_then_m2m_object_ids(self):
with CaptureQueriesContext(connection) as queries:
list(Book.objects.prefetch_related('authors__favorite_authors'))
sql = queries[-1]['sql']
self.assertEqual(sql.count(self.author1.name), 1)
self.assertWhereContains(sql, self.author1.name)
def test_m2m_then_reverse_one_to_one_object_ids(self):
with CaptureQueriesContext(connection) as queries:
list(Book.objects.prefetch_related('authors__authorwithage'))
sql = queries[-1]['sql']
self.assertEqual(sql.count(str(self.author1.id)), 1, sql)
self.assertWhereContains(sql, self.author1.id)
class CustomPrefetchTests(TestCase):