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# Copyright DataStax, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from cassandra.cqlengine import columns
from cassandra.cqlengine.management import drop_keyspace, sync_table, create_keyspace_simple
from cassandra.cqlengine.models import Model
from cassandra.cqlengine.query import ContextQuery
from tests.integration.cqlengine.base import BaseCassEngTestCase
class TestModel(Model):
__keyspace__ = 'ks1'
partition = columns.Integer(primary_key=True)
cluster = columns.Integer(primary_key=True)
count = columns.Integer()
text = columns.Text()
class ContextQueryTests(BaseCassEngTestCase):
KEYSPACES = ('ks1', 'ks2', 'ks3', 'ks4')
@classmethod
def setUpClass(cls):
super(ContextQueryTests, cls).setUpClass()
for ks in cls.KEYSPACES:
create_keyspace_simple(ks, 1)
sync_table(TestModel, keyspaces=cls.KEYSPACES)
@classmethod
def tearDownClass(cls):
super(ContextQueryTests, cls).tearDownClass()
for ks in cls.KEYSPACES:
drop_keyspace(ks)
def setUp(self):
super(ContextQueryTests, self).setUp()
for ks in self.KEYSPACES:
with ContextQuery(TestModel, keyspace=ks) as tm:
for obj in tm.all():
obj.delete()
def test_context_manager(self):
"""
Validates that when a context query is constructed that the
keyspace of the returned model is toggled appropriately
@since 3.6
@jira_ticket PYTHON-598
@expected_result default keyspace should be used
@test_category query
"""
# model keyspace write/read
for ks in self.KEYSPACES:
with ContextQuery(TestModel, keyspace=ks) as tm:
self.assertEqual(tm.__keyspace__, ks)
self.assertEqual(TestModel._get_keyspace(), 'ks1')
def test_default_keyspace(self):
"""
Tests the use of context queries with the default model keyspsace
@since 3.6
@jira_ticket PYTHON-598
@expected_result default keyspace should be used
@test_category query
"""
# model keyspace write/read
for i in range(5):
TestModel.objects.create(partition=i, cluster=i)
with ContextQuery(TestModel) as tm:
self.assertEqual(5, len(tm.objects.all()))
with ContextQuery(TestModel, keyspace='ks1') as tm:
self.assertEqual(5, len(tm.objects.all()))
for ks in self.KEYSPACES[1:]:
with ContextQuery(TestModel, keyspace=ks) as tm:
self.assertEqual(0, len(tm.objects.all()))
def test_context_keyspace(self):
"""
Tests the use of context queries with non default keyspaces
@since 3.6
@jira_ticket PYTHON-598
@expected_result queries should be routed to appropriate keyspaces
@test_category query
"""
for i in range(5):
with ContextQuery(TestModel, keyspace='ks4') as tm:
tm.objects.create(partition=i, cluster=i)
with ContextQuery(TestModel, keyspace='ks4') as tm:
self.assertEqual(5, len(tm.objects.all()))
self.assertEqual(0, len(TestModel.objects.all()))
for ks in self.KEYSPACES[:2]:
with ContextQuery(TestModel, keyspace=ks) as tm:
self.assertEqual(0, len(tm.objects.all()))
# simple data update
with ContextQuery(TestModel, keyspace='ks4') as tm:
obj = tm.objects.get(partition=1)
obj.update(count=42)
self.assertEqual(42, tm.objects.get(partition=1).count)
def test_context_multiple_models(self):
"""
Tests the use of multiple models with the context manager
@since 3.7
@jira_ticket PYTHON-613
@expected_result all models are properly updated with the context
@test_category query
"""
with ContextQuery(TestModel, TestModel, keyspace='ks4') as (tm1, tm2):
self.assertNotEqual(tm1, tm2)
self.assertEqual(tm1.__keyspace__, 'ks4')
self.assertEqual(tm2.__keyspace__, 'ks4')
def test_context_invalid_parameters(self):
"""
Tests that invalid parameters are raised by the context manager
@since 3.7
@jira_ticket PYTHON-613
@expected_result a ValueError is raised when passing invalid parameters
@test_category query
"""
with self.assertRaises(ValueError):
with ContextQuery(keyspace='ks2'):
pass
with self.assertRaises(ValueError):
with ContextQuery(42) as tm:
pass
with self.assertRaises(ValueError):
with ContextQuery(TestModel, 42):
pass
with self.assertRaises(ValueError):
with ContextQuery(TestModel, unknown_param=42):
pass
with self.assertRaises(ValueError):
with ContextQuery(TestModel, keyspace='ks2', unknown_param=42):
pass
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