Skip ArrayField in exact conds

Closes #489

Author: Suor

cacheops/conf.py

@@ -21,7 +21,7 @@ class Defaults:
     CACHEOPS_SENTINEL = {}
     # NOTE: we don't use this fields in invalidator conditions since their values could be very long
     #       and one should not filter by their equality anyway.
-    CACHEOPS_SKIP_FIELDS = "FileField", "TextField", "BinaryField", "JSONField"
+    CACHEOPS_SKIP_FIELDS = "FileField", "TextField", "BinaryField", "JSONField", "ArrayField"
     CACHEOPS_LONG_DISJUNCTION = 8
     CACHEOPS_SERIALIZER = 'pickle'
 

tests/tests.py

@@ -730,11 +730,10 @@ def test_480(self):
             conditions.append(reduce(operator.or_, queries))
         list(queryset.filter(reduce(operator.and_, conditions)).cache())
 
+    @unittest.skipIf(connection.vendor != 'postgresql', "Only for PostgreSQL")
     def test_489(self):
-        _ = TaggedPost.objects.create(meta={}, tags=[1, 2, 3])
-        tags = TaggedPost.objects.cache().exclude(tags=[])
+        TaggedPost.objects.cache().filter(tags=[]).count()
 
-        self.assertEqual(tags.count(), 1)
 
 class RelatedTests(BaseTestCase):
     fixtures = ['basic']