def _users_handle_update(self, req, resp):
update_clause, u_values = util.entry_to_update(
req.entry, deferred=self._filter_defer)
filter_clause, f_values = util.equivalent_filter(
req.match, deferred=self._filter_defer)
values = u_values + f_values
if not filter_clause or not update_clause:
self._logger.info(
"Could not generate update SQL: "
"filter_clause: '%s', update_clause: '%s'", filter_clause,
update_clause)
resp.result_type = general_pb2.ResultType.ERROR
resp.error = "Bad input: could not generate SQL."
return
sql = "UPDATE users SET " + update_clause + " WHERE " + filter_clause
valstr = ', '.join(str(v) for v in values)
self._logger.debug('Running query "%s" with values (%s)', sql, valstr)
try:
count = self._db.execute_count(sql, *values)
except sqlite3.Error as e:
resp.result_type = general_pb2.ResultType.ERROR
resp.error = str(e)
return
if count != 1:
err = 'UPDATE affected {} rows, expected 1'.format(count)
resp.result_type = general_pb2.ResultType.ERROR
self._logger.warning(err)
resp.error = err
resp.result_type = general_pb2.ResultType.OK
def _follow_handle_find(self, req, resp):
default = [("state", database_pb2.Follow.ACTIVE)]
filter_clause, values = util.equivalent_filter(req.match, default)
try:
if not filter_clause:
# Since we set a default match, this should never happen.
err = 'Query {} not allowed for follows'.format(
'SELECT * FROM follows', )
self._logger.warning(err)
resp.result_type = general_pb2.ResultType.ERROR
resp.error = err
return
else:
query = 'SELECT * FROM follows WHERE ' + filter_clause
valstr = ', '.join(str(v) for v in values)
self._logger.debug('Running query "%s" with values (%s)',
query, valstr)
res = self._db.execute(query, *values)
except sqlite3.Error as e:
self._logger.warning('Got error reading DB: ' + str(e))
resp.result_type = general_pb2.ResultType.ERROR
resp.error = str(e)
return
resp.result_type = general_pb2.ResultType.OK
for tup in res:
if not self._db_tuple_to_entry(tup, resp.results.add()):
del resp.results[-1]
self._logger.debug('%d results of follower query.', len(resp.results))
def test_equivalent_filter_defaults(self):
entry = database_pb2.PostsEntry(title="Despacito")
clause, vals = util.equivalent_filter(entry,
defaults=[('body', 'cool')])
self.assertIn("title = ?", clause)
self.assertIn("AND", clause)
self.assertIn("body = ?", clause)
self.assertIn("Despacito", vals)
self.assertIn("cool", vals)
def test_equivalent_filter_deferred_default_unset(self):
entry = database_pb2.PostsEntry(title="Despacito", )
d = {'body': lambda entry, comp: ("body" + comp, True)}
de = [('body', False)]
clause, vals = util.equivalent_filter(entry, defaults=de, deferred=d)
self.assertIn("title = ?", clause)
self.assertIn("AND", clause)
self.assertIn("body = ?", clause)
self.assertIn("Despacito", vals)
self.assertIn(False, vals)
def _handle_delete(self, req, resp):
filter_clause, values = util.equivalent_filter(req.match)
try:
if not filter_clause:
self._db.execute('DELETE FROM posts')
else:
self._db.execute('DELETE FROM posts WHERE ' + filter_clause,
*values)
except sqlite3.Error as e:
resp.result_type = general_pb2.ResultType.ERROR
resp.error = str(e)
return
resp.result_type = general_pb2.ResultType.OK
def _follow_handle_delete(self, req, resp):
self._logger.info('Deleting follow from Follow database.')
try:
filter_clause, values = util.equivalent_filter(req.match)
query = 'DELETE FROM follows WHERE ' + filter_clause
# TODO(iandioch): Count affected rows.
self._db.execute(query, *values)
except sqlite3.Error as e:
self._logger.error(str(e))
resp.result_type = general_pb2.ResultType.ERROR
resp.error = str(e)
return
resp.result_type = general_pb2.ResultType.OK
def test_equivalent_filter_deferred(self):
entry = database_pb2.PostsEntry(
title="Despacito",
body="alexa",
)
d = {'body': lambda entry, comp: ("body" + comp, True)}
clause, vals = util.equivalent_filter(entry, deferred=d)
self.assertIn("title = ?", clause)
self.assertIn("AND", clause)
self.assertIn("body = ?", clause)
self.assertIn("Despacito", vals)
self.assertIn(True, vals)
self.assertNotIn("alexa", vals)
def _handle_find(self, req, resp):
filter_clause, values = util.equivalent_filter(req.match)
user_id = -1
if req.HasField("user_global_id"):
user_id = req.user_global_id.value
try:
if not filter_clause:
res = self._db.execute(self._select_base, user_id, user_id,
user_id)
else:
res = self._db.execute(
self._select_base + "WHERE " + filter_clause +
" ORDER BY p.global_id DESC",
*([user_id, user_id, user_id] + values))
except sqlite3.Error as e:
resp.result_type = general_pb2.ResultType.ERROR
resp.error = str(e)
return
resp.result_type = general_pb2.ResultType.OK
for tup in res:
if not self._db_tuple_to_entry(tup, resp.results.add()):
del resp.results[-1]
def _follow_handle_update(self, req, resp):
if not req.HasField("match") or not req.HasField("entry"):
resp.result_type = general_pb2.ResultType.ERROR
resp.error = "bad parameters: please set both match and entry"
return
if not req.match.follower or not req.match.followed:
resp.result_type = general_pb2.ResultType.ERROR
resp.error = "bad parameters: please set both follower and followed"
return
filter_clause, values = util.equivalent_filter(req.match)
if not filter_clause:
resp.result_type = general_pb2.ResultType.ERROR
resp.error = "could not create filter for UPDATE"
return
try:
# since we only update state we can hardcode that paramater
query = 'UPDATE follows SET state = ? WHERE ' + filter_clause
valstr = str(req.entry.state) + ", " + ', '.join(
str(v) for v in values)
count = self._db.execute_count(query, req.entry.state, *values)
except sqlite3.Error as e:
self._logger.warning('Got error writing to DB: ' + str(e))
resp.result_type = general_pb2.ResultType.ERROR
resp.error = str(e)
return
if count != 1:
err = 'UPDATE affected {} rows, expected 1'.format(count)
resp.result_type = general_pb2.ResultType.ERROR
self._logger.warning(err)
resp.error = err
resp.result_type = general_pb2.ResultType.OK
def test_equivalent_filter(self):
entry = database_pb2.PostsEntry(title="Despacito")
clause, vals = util.equivalent_filter(entry)
self.assertEqual(clause, "title = ?")
self.assertEqual(vals, ["Despacito"])
def _users_handle_find(self, req, resp):
filter_clause, values = util.equivalent_filter(
req.match, deferred=self._filter_defer)
self._user_find_op(resp, filter_clause, values, self._get_uid(req))
