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from django.core.exceptions import ImproperlyConfigured
from django.test import override_settings
from cacheops import cache, CacheMiss
from .models import Category, Post, Extra
from .utils import BaseTestCase
class PrefixTests(BaseTestCase):
databases = ('default', 'slave')
fixtures = ['basic']
def test_context(self):
prefix = ['']
with override_settings(CACHEOPS_PREFIX=lambda _: prefix[0]):
with self.assertNumQueries(2):
Category.objects.cache().count()
prefix[0] = 'x'
Category.objects.cache().count()
@override_settings(CACHEOPS_PREFIX=lambda q: q.db)
def test_db(self):
with self.assertNumQueries(1):
list(Category.objects.cache())
with self.assertNumQueries(1, using='slave'):
list(Category.objects.cache().using('slave'))
list(Category.objects.cache().using('slave'))
@override_settings(CACHEOPS_PREFIX=lambda q: q.table)
def test_table(self):
self.assertTrue(Category.objects.all()._cache_key().startswith('tests_category'))
with self.assertRaises(ImproperlyConfigured):
list(Post.objects.filter(category__title='Django').cache())
@override_settings(CACHEOPS_PREFIX=lambda q: q.table)
def test_self_join_tables(self):
list(Extra.objects.filter(to_tag__pk=1).cache())
@override_settings(CACHEOPS_PREFIX=lambda q: q.table)
def test_union_tables(self):
qs = Post.objects.filter(pk=1).union(Post.objects.filter(pk=2)).cache()
list(qs)
class SimpleCacheTests(BaseTestCase):
def test_prefix(self):
with override_settings(CACHEOPS_PREFIX=lambda _: 'a'):
cache.set("key", "value")
self.assertEqual(cache.get("key"), "value")
with self.assertRaises(CacheMiss):
cache.get("key")
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