def test_run_query_wo_namespace_empty_result(self):
from gcloud.datastore.connection import datastore_pb
from gcloud.datastore.query import Query
DATASET_ID = 'DATASET'
KIND = 'Nonesuch'
CURSOR = b'\x00'
q_pb = Query(KIND, DATASET_ID).to_protobuf()
rsp_pb = datastore_pb.RunQueryResponse()
rsp_pb.batch.end_cursor = CURSOR
no_more = datastore_pb.QueryResultBatch.NO_MORE_RESULTS
rsp_pb.batch.more_results = no_more
rsp_pb.batch.entity_result_type = datastore_pb.EntityResult.FULL
conn = self._makeOne()
URI = '/'.join([
conn.API_BASE_URL,
'datastore',
conn.API_VERSION,
'datasets',
DATASET_ID,
'runQuery',
])
http = conn._http = Http({'status': '200'}, rsp_pb.SerializeToString())
pbs, end, more, skipped = conn.run_query(DATASET_ID, q_pb)
self.assertEqual(pbs, [])
self.assertEqual(end, CURSOR)
self.assertTrue(more)
self.assertEqual(skipped, 0)
cw = http._called_with
self._verifyProtobufCall(cw, URI, conn)
rq_class = datastore_pb.RunQueryRequest
request = rq_class()
request.ParseFromString(cw['body'])
self.assertEqual(request.partition_id.namespace, '')
self.assertEqual(request.query, q_pb)
def test_run_query_w_namespace_nonempty_result(self):
from gcloud.datastore.connection import datastore_pb
from gcloud.datastore.query import Query
DATASET_ID = 'DATASET'
KIND = 'Kind'
entity = datastore_pb.Entity()
q_pb = Query(KIND, DATASET_ID).to_protobuf()
rsp_pb = datastore_pb.RunQueryResponse()
rsp_pb.batch.entity_result.add(entity=entity)
rsp_pb.batch.entity_result_type = 1 # FULL
rsp_pb.batch.more_results = 3 # NO_MORE_RESULTS
conn = self._makeOne()
URI = '/'.join([
conn.API_BASE_URL,
'datastore',
conn.API_VERSION,
'datasets',
DATASET_ID,
'runQuery',
])
http = conn._http = Http({'status': '200'}, rsp_pb.SerializeToString())
pbs = conn.run_query(DATASET_ID, q_pb, 'NS')[0]
self.assertEqual(len(pbs), 1)
cw = http._called_with
self._verifyProtobufCall(cw, URI, conn)
rq_class = datastore_pb.RunQueryRequest
request = rq_class()
request.ParseFromString(cw['body'])
self.assertEqual(request.partition_id.namespace, 'NS')
self.assertEqual(request.query, q_pb)
def test_run_query_wo_namespace_empty_result(self):
from gcloud.datastore.connection import datastore_pb
from gcloud.datastore.query import Query
DATASET_ID = 'DATASET'
KIND = 'Nonesuch'
q_pb = Query(KIND, DATASET_ID).to_protobuf()
rsp_pb = datastore_pb.RunQueryResponse()
conn = self._makeOne()
URI = '/'.join([
conn.API_BASE_URL,
'datastore',
conn.API_VERSION,
'datasets',
DATASET_ID,
'runQuery',
])
http = conn._http = Http({'status': '200'}, rsp_pb.SerializeToString())
pbs, end, more, skipped = conn.run_query(DATASET_ID, q_pb)
self.assertEqual(pbs, [])
self.assertEqual(end, '')
self.assertTrue(more)
self.assertEqual(skipped, 0)
cw = http._called_with
self.assertEqual(cw['uri'], URI)
self.assertEqual(cw['method'], 'POST')
self.assertEqual(cw['headers']['Content-Type'],
'application/x-protobuf')
self.assertEqual(cw['headers']['User-Agent'], conn.USER_AGENT)
rq_class = datastore_pb.RunQueryRequest
request = rq_class()
request.ParseFromString(cw['body'])
self.assertEqual(request.partition_id.namespace, '')
self.assertEqual(request.query, q_pb)
def query(self, **kwargs):
"""Proxy to :class:`gcloud.datastore.query.Query`.
Passes our ``dataset_id``.
"""
if 'dataset_id' in kwargs:
raise TypeError('Cannot pass dataset_id')
kwargs['dataset_id'] = self.dataset_id
return Query(**kwargs)
def query(self, *args, **kwargs):
"""Create a query bound to this dataset.
:param args: positional arguments, passed through to the Query
:param kw: keyword arguments, passed through to the Query
:rtype: :class:`gcloud.datastore.query.Query`
:returns: a new Query instance, bound to this dataset.
"""
kwargs['dataset'] = self
return Query(*args, **kwargs)
def query(self, **kwargs):
"""Proxy to :class:`gcloud.datastore.query.Query`.
Passes our ``dataset_id``.
"""
if 'client' in kwargs:
raise TypeError('Cannot pass client')
if 'dataset_id' in kwargs:
raise TypeError('Cannot pass dataset_id')
kwargs['dataset_id'] = self.dataset_id
if 'namespace' not in kwargs:
kwargs['namespace'] = self.namespace
return Query(self, **kwargs)
def query(self, **kwargs):
"""Proxy to :class:`gcloud.datastore.query.Query`.
Passes our ``project``.
"""
if 'client' in kwargs:
raise TypeError('Cannot pass client')
if 'project' in kwargs:
raise TypeError('Cannot pass project')
kwargs['project'] = self.project
if 'namespace' not in kwargs:
kwargs['namespace'] = self.namespace
return Query(self, **kwargs)
def list_reports(employee_id=None, status=None):
query = Query(kind='Expense Report')
if employee_id is not None:
key = Key('Employee', employee_id)
query.ancestor = key
if status is not None:
query.add_filter('status', '=', status)
for report in query.fetch():
yield _report_info(report)
def test_run_query_w_eventual_and_transaction(self):
from gcloud.datastore.connection import datastore_pb
from gcloud.datastore.query import Query
DATASET_ID = 'DATASET'
KIND = 'Nonesuch'
CURSOR = b'\x00'
TRANSACTION = 'TRANSACTION'
q_pb = Query(KIND, DATASET_ID).to_protobuf()
rsp_pb = datastore_pb.RunQueryResponse()
rsp_pb.batch.end_cursor = CURSOR
no_more = datastore_pb.QueryResultBatch.NO_MORE_RESULTS
rsp_pb.batch.more_results = no_more
rsp_pb.batch.entity_result_type = datastore_pb.EntityResult.FULL
conn = self._makeOne()
conn.transaction(Transaction(TRANSACTION))
self.assertRaises(
ValueError, conn.run_query, DATASET_ID, q_pb, eventual=True)
def query(self, **kwargs):
"""Proxy to :class:`gcloud.datastore.query.Query`.
Passes our ``project``.
Using query to search a datastore::
>>> from gcloud import datastore
>>> client = datastore.Client()
>>> query = client.query(kind='MyKind')
>>> query.add_filter('property', '=', 'val')
Using the query iterator's
:meth:`next_page() <gcloud.datastore.query.Iterator.next_page>` method:
>>> query_iter = query.fetch()
>>> entities, more_results, cursor = query_iter.next_page()
>>> entities
[<list of Entity unmarshalled from protobuf>]
>>> more_results
<boolean of more results>
>>> cursor
<string containing cursor where fetch stopped>
Under the hood this is doing:
>>> connection.run_query('project', query.to_protobuf())
[<list of Entity Protobufs>], cursor, more_results, skipped_results
:type kwargs: dict
:param kwargs: Parameters for initializing and instance of
:class:`gcloud.datastore.query.Query`.
:rtype: :class:`gcloud.datastore.query.Query`
:returns: An instance of :class:`gcloud.datastore.query.Query`
"""
if 'client' in kwargs:
raise TypeError('Cannot pass client')
if 'project' in kwargs:
raise TypeError('Cannot pass project')
kwargs['project'] = self.project
if 'namespace' not in kwargs:
kwargs['namespace'] = self.namespace
return Query(self, **kwargs)
def query(self, *args, **kwargs): from gcloud.datastore.query import Query kwargs['dataset'] = self return Query(*args, **kwargs)
def _fetch_report_items(report):
query = Query(kind='Expense Item')
query.ancestor = report.key
for item in query.fetch():
yield item
def _fetch_reports(employee):
query = Query(kind='Expense Report')
query.ancestor = employee.key
for item in query.fetch():
yield item
def list_employees():
query = Query(kind='Employee')
for employee in query.fetch():
yield _employee_info(employee)
