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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.
import unittest
from unittest import mock
from uuid import uuid4
from cassandra.cqlengine import columns
from cassandra.cqlengine.management import sync_table, drop_table
from cassandra.cqlengine.models import Model
from cassandra.cqlengine.query import BatchQuery, BatchType, LWTException, IfExistsWithCounterColumn
from tests.integration.cqlengine.base import BaseCassEngTestCase
from tests.integration import PROTOCOL_VERSION
class TestIfExistsModel(Model):
id = columns.UUID(primary_key=True, default=lambda: uuid4())
count = columns.Integer()
text = columns.Text(required=False)
class TestIfExistsModel2(Model):
id = columns.Integer(primary_key=True)
count = columns.Integer(primary_key=True, required=False)
text = columns.Text(required=False)
class TestIfExistsWithCounterModel(Model):
id = columns.UUID(primary_key=True, default=lambda: uuid4())
likes = columns.Counter()
class BaseIfExistsTest(BaseCassEngTestCase):
@classmethod
def setUpClass(cls):
super(BaseIfExistsTest, cls).setUpClass()
sync_table(TestIfExistsModel)
sync_table(TestIfExistsModel2)
@classmethod
def tearDownClass(cls):
super(BaseIfExistsTest, cls).tearDownClass()
drop_table(TestIfExistsModel)
drop_table(TestIfExistsModel2)
class BaseIfExistsWithCounterTest(BaseCassEngTestCase):
@classmethod
def setUpClass(cls):
super(BaseIfExistsWithCounterTest, cls).setUpClass()
sync_table(TestIfExistsWithCounterModel)
@classmethod
def tearDownClass(cls):
super(BaseIfExistsWithCounterTest, cls).tearDownClass()
drop_table(TestIfExistsWithCounterModel)
class IfExistsUpdateTests(BaseIfExistsTest):
@unittest.skipUnless(PROTOCOL_VERSION >= 2, "only runs against the cql3 protocol v2.0")
def test_update_if_exists(self):
"""
Tests that update with if_exists work as expected
@since 3.1
@jira_ticket PYTHON-432
@expected_result updates to be applied when primary key exists, otherwise LWT exception to be thrown
@test_category object_mapper
"""
id = uuid4()
m = TestIfExistsModel.create(id=id, count=8, text='123456789')
m.text = 'changed'
m.if_exists().update()
m = TestIfExistsModel.get(id=id)
self.assertEqual(m.text, 'changed')
# save()
m.text = 'changed_again'
m.if_exists().save()
m = TestIfExistsModel.get(id=id)
self.assertEqual(m.text, 'changed_again')
m = TestIfExistsModel(id=uuid4(), count=44) # do not exists
with self.assertRaises(LWTException) as assertion:
m.if_exists().update()
self.assertEqual(assertion.exception.existing, {
'[applied]': False,
})
# queryset update
with self.assertRaises(LWTException) as assertion:
TestIfExistsModel.objects(id=uuid4()).if_exists().update(count=8)
self.assertEqual(assertion.exception.existing, {
'[applied]': False,
})
@unittest.skipUnless(PROTOCOL_VERSION >= 2, "only runs against the cql3 protocol v2.0")
def test_batch_update_if_exists_success(self):
"""
Tests that batch update with if_exists work as expected
@since 3.1
@jira_ticket PYTHON-432
@expected_result
@test_category object_mapper
"""
id = uuid4()
m = TestIfExistsModel.create(id=id, count=8, text='123456789')
with BatchQuery() as b:
m.text = '111111111'
m.batch(b).if_exists().update()
with self.assertRaises(LWTException) as assertion:
with BatchQuery() as b:
m = TestIfExistsModel(id=uuid4(), count=42) # Doesn't exist
m.batch(b).if_exists().update()
self.assertEqual(assertion.exception.existing, {
'[applied]': False,
})
q = TestIfExistsModel.objects(id=id)
self.assertEqual(len(q), 1)
tm = q.first()
self.assertEqual(tm.count, 8)
self.assertEqual(tm.text, '111111111')
@unittest.skipUnless(PROTOCOL_VERSION >= 2, "only runs against the cql3 protocol v2.0")
def test_batch_mixed_update_if_exists_success(self):
"""
Tests that batch update with with one bad query will still fail with LWTException
@since 3.1
@jira_ticket PYTHON-432
@expected_result
@test_category object_mapper
"""
m = TestIfExistsModel2.create(id=1, count=8, text='123456789')
with self.assertRaises(LWTException) as assertion:
with BatchQuery() as b:
m.text = '111111112'
m.batch(b).if_exists().update() # Does exist
n = TestIfExistsModel2(id=1, count=10, text="Failure") # Doesn't exist
n.batch(b).if_exists().update()
self.assertEqual(assertion.exception.existing.get('[applied]'), False)
@unittest.skipUnless(PROTOCOL_VERSION >= 2, "only runs against the cql3 protocol v2.0")
def test_delete_if_exists(self):
"""
Tests that delete with if_exists work, and throw proper LWT exception when they are are not applied
@since 3.1
@jira_ticket PYTHON-432
@expected_result Deletes will be preformed if they exist, otherwise throw LWT exception
@test_category object_mapper
"""
id = uuid4()
m = TestIfExistsModel.create(id=id, count=8, text='123456789')
m.if_exists().delete()
q = TestIfExistsModel.objects(id=id)
self.assertEqual(len(q), 0)
m = TestIfExistsModel(id=uuid4(), count=44) # do not exists
with self.assertRaises(LWTException) as assertion:
m.if_exists().delete()
self.assertEqual(assertion.exception.existing, {
'[applied]': False,
})
# queryset delete
with self.assertRaises(LWTException) as assertion:
TestIfExistsModel.objects(id=uuid4()).if_exists().delete()
self.assertEqual(assertion.exception.existing, {
'[applied]': False,
})
@unittest.skipUnless(PROTOCOL_VERSION >= 2, "only runs against the cql3 protocol v2.0")
def test_batch_delete_if_exists_success(self):
"""
Tests that batch deletes with if_exists work, and throw proper LWTException when they are are not applied
@since 3.1
@jira_ticket PYTHON-432
@expected_result Deletes will be preformed if they exist, otherwise throw LWTException
@test_category object_mapper
"""
id = uuid4()
m = TestIfExistsModel.create(id=id, count=8, text='123456789')
with BatchQuery() as b:
m.batch(b).if_exists().delete()
q = TestIfExistsModel.objects(id=id)
self.assertEqual(len(q), 0)
with self.assertRaises(LWTException) as assertion:
with BatchQuery() as b:
m = TestIfExistsModel(id=uuid4(), count=42) # Doesn't exist
m.batch(b).if_exists().delete()
self.assertEqual(assertion.exception.existing, {
'[applied]': False,
})
@unittest.skipUnless(PROTOCOL_VERSION >= 2, "only runs against the cql3 protocol v2.0")
def test_batch_delete_mixed(self):
"""
Tests that batch deletes with multiple queries and throw proper LWTException when they are are not all applicable
@since 3.1
@jira_ticket PYTHON-432
@expected_result If one delete clause doesn't exist all should fail.
@test_category object_mapper
"""
m = TestIfExistsModel2.create(id=3, count=8, text='123456789')
with self.assertRaises(LWTException) as assertion:
with BatchQuery() as b:
m.batch(b).if_exists().delete() # Does exist
n = TestIfExistsModel2(id=3, count=42, text='1111111') # Doesn't exist
n.batch(b).if_exists().delete()
self.assertEqual(assertion.exception.existing.get('[applied]'), False)
q = TestIfExistsModel2.objects(id=3, count=8)
self.assertEqual(len(q), 1)
class IfExistsQueryTest(BaseIfExistsTest):
def test_if_exists_included_on_queryset_update(self):
with mock.patch.object(self.session, 'execute') as m:
TestIfExistsModel.objects(id=uuid4()).if_exists().update(count=42)
query = m.call_args[0][0].query_string
self.assertIn("IF EXISTS", query)
def test_if_exists_included_on_update(self):
""" tests that if_exists on models update works as expected """
with mock.patch.object(self.session, 'execute') as m:
TestIfExistsModel(id=uuid4()).if_exists().update(count=8)
query = m.call_args[0][0].query_string
self.assertIn("IF EXISTS", query)
def test_if_exists_included_on_delete(self):
""" tests that if_exists on models delete works as expected """
with mock.patch.object(self.session, 'execute') as m:
TestIfExistsModel(id=uuid4()).if_exists().delete()
query = m.call_args[0][0].query_string
self.assertIn("IF EXISTS", query)
class IfExistWithCounterTest(BaseIfExistsWithCounterTest):
def test_instance_raise_exception(self):
"""
Tests if exists is used with a counter column model that exception are thrown
@since 3.1
@jira_ticket PYTHON-432
@expected_result Deletes will be preformed if they exist, otherwise throw LWTException
@test_category object_mapper
"""
id = uuid4()
with self.assertRaises(IfExistsWithCounterColumn):
TestIfExistsWithCounterModel.if_exists()
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