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https://mau.dev/maunium/synapse.git
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818 lines
30 KiB
Python
818 lines
30 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2017 Vector Creations Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import re
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from twisted.internet import defer
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from synapse.api.constants import EventTypes, JoinRules
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from synapse.storage.background_updates import BackgroundUpdateStore
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from synapse.storage.engines import PostgresEngine, Sqlite3Engine
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from synapse.storage.state import StateFilter
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from synapse.storage.state_deltas import StateDeltasStore
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from synapse.types import get_domain_from_id, get_localpart_from_id
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from synapse.util.caches.descriptors import cached
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logger = logging.getLogger(__name__)
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TEMP_TABLE = "_temp_populate_user_directory"
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class UserDirectoryStore(StateDeltasStore, BackgroundUpdateStore):
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# How many records do we calculate before sending it to
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# add_users_who_share_private_rooms?
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SHARE_PRIVATE_WORKING_SET = 500
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def __init__(self, db_conn, hs):
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super(UserDirectoryStore, self).__init__(db_conn, hs)
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self.server_name = hs.hostname
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self.register_background_update_handler(
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"populate_user_directory_createtables",
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self._populate_user_directory_createtables,
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)
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self.register_background_update_handler(
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"populate_user_directory_process_rooms",
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self._populate_user_directory_process_rooms,
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)
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self.register_background_update_handler(
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"populate_user_directory_process_users",
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self._populate_user_directory_process_users,
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)
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self.register_background_update_handler(
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"populate_user_directory_cleanup", self._populate_user_directory_cleanup
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)
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@defer.inlineCallbacks
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def _populate_user_directory_createtables(self, progress, batch_size):
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# Get all the rooms that we want to process.
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def _make_staging_area(txn):
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sql = (
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"CREATE TABLE IF NOT EXISTS "
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+ TEMP_TABLE
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+ "_rooms(room_id TEXT NOT NULL, events BIGINT NOT NULL)"
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)
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txn.execute(sql)
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sql = (
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"CREATE TABLE IF NOT EXISTS "
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+ TEMP_TABLE
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+ "_position(position TEXT NOT NULL)"
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)
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txn.execute(sql)
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# Get rooms we want to process from the database
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sql = """
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SELECT room_id, count(*) FROM current_state_events
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GROUP BY room_id
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"""
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txn.execute(sql)
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rooms = [{"room_id": x[0], "events": x[1]} for x in txn.fetchall()]
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self._simple_insert_many_txn(txn, TEMP_TABLE + "_rooms", rooms)
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del rooms
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# If search all users is on, get all the users we want to add.
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if self.hs.config.user_directory_search_all_users:
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sql = (
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"CREATE TABLE IF NOT EXISTS "
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+ TEMP_TABLE
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+ "_users(user_id TEXT NOT NULL)"
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)
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txn.execute(sql)
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txn.execute("SELECT name FROM users")
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users = [{"user_id": x[0]} for x in txn.fetchall()]
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self._simple_insert_many_txn(txn, TEMP_TABLE + "_users", users)
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new_pos = yield self.get_max_stream_id_in_current_state_deltas()
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yield self.runInteraction(
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"populate_user_directory_temp_build", _make_staging_area
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)
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yield self._simple_insert(TEMP_TABLE + "_position", {"position": new_pos})
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yield self._end_background_update("populate_user_directory_createtables")
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return 1
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@defer.inlineCallbacks
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def _populate_user_directory_cleanup(self, progress, batch_size):
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"""
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Update the user directory stream position, then clean up the old tables.
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"""
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position = yield self._simple_select_one_onecol(
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TEMP_TABLE + "_position", None, "position"
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)
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yield self.update_user_directory_stream_pos(position)
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def _delete_staging_area(txn):
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txn.execute("DROP TABLE IF EXISTS " + TEMP_TABLE + "_rooms")
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txn.execute("DROP TABLE IF EXISTS " + TEMP_TABLE + "_users")
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txn.execute("DROP TABLE IF EXISTS " + TEMP_TABLE + "_position")
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yield self.runInteraction(
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"populate_user_directory_cleanup", _delete_staging_area
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)
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yield self._end_background_update("populate_user_directory_cleanup")
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return 1
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@defer.inlineCallbacks
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def _populate_user_directory_process_rooms(self, progress, batch_size):
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"""
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Args:
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progress (dict)
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batch_size (int): Maximum number of state events to process
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per cycle.
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"""
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state = self.hs.get_state_handler()
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# If we don't have progress filed, delete everything.
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if not progress:
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yield self.delete_all_from_user_dir()
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def _get_next_batch(txn):
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# Only fetch 250 rooms, so we don't fetch too many at once, even
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# if those 250 rooms have less than batch_size state events.
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sql = """
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SELECT room_id, events FROM %s
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ORDER BY events DESC
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LIMIT 250
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""" % (
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TEMP_TABLE + "_rooms",
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)
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txn.execute(sql)
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rooms_to_work_on = txn.fetchall()
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if not rooms_to_work_on:
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return None
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# Get how many are left to process, so we can give status on how
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# far we are in processing
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txn.execute("SELECT COUNT(*) FROM " + TEMP_TABLE + "_rooms")
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progress["remaining"] = txn.fetchone()[0]
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return rooms_to_work_on
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rooms_to_work_on = yield self.runInteraction(
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"populate_user_directory_temp_read", _get_next_batch
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)
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# No more rooms -- complete the transaction.
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if not rooms_to_work_on:
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yield self._end_background_update("populate_user_directory_process_rooms")
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return 1
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logger.info(
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"Processing the next %d rooms of %d remaining"
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% (len(rooms_to_work_on), progress["remaining"])
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)
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processed_event_count = 0
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for room_id, event_count in rooms_to_work_on:
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is_in_room = yield self.is_host_joined(room_id, self.server_name)
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if is_in_room:
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is_public = yield self.is_room_world_readable_or_publicly_joinable(
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room_id
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)
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users_with_profile = yield state.get_current_users_in_room(room_id)
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user_ids = set(users_with_profile)
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# Update each user in the user directory.
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for user_id, profile in users_with_profile.items():
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yield self.update_profile_in_user_dir(
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user_id, profile.display_name, profile.avatar_url
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)
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to_insert = set()
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if is_public:
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for user_id in user_ids:
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if self.get_if_app_services_interested_in_user(user_id):
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continue
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to_insert.add(user_id)
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if to_insert:
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yield self.add_users_in_public_rooms(room_id, to_insert)
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to_insert.clear()
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else:
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for user_id in user_ids:
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if not self.hs.is_mine_id(user_id):
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continue
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if self.get_if_app_services_interested_in_user(user_id):
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continue
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for other_user_id in user_ids:
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if user_id == other_user_id:
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continue
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user_set = (user_id, other_user_id)
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to_insert.add(user_set)
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# If it gets too big, stop and write to the database
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# to prevent storing too much in RAM.
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if len(to_insert) >= self.SHARE_PRIVATE_WORKING_SET:
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yield self.add_users_who_share_private_room(
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room_id, to_insert
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)
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to_insert.clear()
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if to_insert:
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yield self.add_users_who_share_private_room(room_id, to_insert)
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to_insert.clear()
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# We've finished a room. Delete it from the table.
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yield self._simple_delete_one(TEMP_TABLE + "_rooms", {"room_id": room_id})
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# Update the remaining counter.
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progress["remaining"] -= 1
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yield self.runInteraction(
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"populate_user_directory",
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self._background_update_progress_txn,
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"populate_user_directory_process_rooms",
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progress,
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)
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processed_event_count += event_count
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if processed_event_count > batch_size:
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# Don't process any more rooms, we've hit our batch size.
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return processed_event_count
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return processed_event_count
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@defer.inlineCallbacks
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def _populate_user_directory_process_users(self, progress, batch_size):
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"""
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If search_all_users is enabled, add all of the users to the user directory.
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"""
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if not self.hs.config.user_directory_search_all_users:
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yield self._end_background_update("populate_user_directory_process_users")
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return 1
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def _get_next_batch(txn):
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sql = "SELECT user_id FROM %s LIMIT %s" % (
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TEMP_TABLE + "_users",
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str(batch_size),
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)
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txn.execute(sql)
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users_to_work_on = txn.fetchall()
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if not users_to_work_on:
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return None
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users_to_work_on = [x[0] for x in users_to_work_on]
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# Get how many are left to process, so we can give status on how
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# far we are in processing
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sql = "SELECT COUNT(*) FROM " + TEMP_TABLE + "_users"
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txn.execute(sql)
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progress["remaining"] = txn.fetchone()[0]
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return users_to_work_on
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users_to_work_on = yield self.runInteraction(
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"populate_user_directory_temp_read", _get_next_batch
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)
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# No more users -- complete the transaction.
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if not users_to_work_on:
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yield self._end_background_update("populate_user_directory_process_users")
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return 1
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logger.info(
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"Processing the next %d users of %d remaining"
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% (len(users_to_work_on), progress["remaining"])
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)
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for user_id in users_to_work_on:
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profile = yield self.get_profileinfo(get_localpart_from_id(user_id))
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yield self.update_profile_in_user_dir(
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user_id, profile.display_name, profile.avatar_url
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)
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# We've finished processing a user. Delete it from the table.
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yield self._simple_delete_one(TEMP_TABLE + "_users", {"user_id": user_id})
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# Update the remaining counter.
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progress["remaining"] -= 1
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yield self.runInteraction(
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"populate_user_directory",
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self._background_update_progress_txn,
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"populate_user_directory_process_users",
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progress,
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)
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return len(users_to_work_on)
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@defer.inlineCallbacks
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def is_room_world_readable_or_publicly_joinable(self, room_id):
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"""Check if the room is either world_readable or publically joinable
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"""
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# Create a state filter that only queries join and history state event
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types_to_filter = (
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(EventTypes.JoinRules, ""),
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(EventTypes.RoomHistoryVisibility, ""),
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)
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current_state_ids = yield self.get_filtered_current_state_ids(
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room_id, StateFilter.from_types(types_to_filter)
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)
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join_rules_id = current_state_ids.get((EventTypes.JoinRules, ""))
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if join_rules_id:
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join_rule_ev = yield self.get_event(join_rules_id, allow_none=True)
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if join_rule_ev:
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if join_rule_ev.content.get("join_rule") == JoinRules.PUBLIC:
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return True
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hist_vis_id = current_state_ids.get((EventTypes.RoomHistoryVisibility, ""))
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if hist_vis_id:
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hist_vis_ev = yield self.get_event(hist_vis_id, allow_none=True)
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if hist_vis_ev:
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if hist_vis_ev.content.get("history_visibility") == "world_readable":
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return True
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return False
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def update_profile_in_user_dir(self, user_id, display_name, avatar_url):
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"""
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Update or add a user's profile in the user directory.
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"""
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def _update_profile_in_user_dir_txn(txn):
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new_entry = self._simple_upsert_txn(
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txn,
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table="user_directory",
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keyvalues={"user_id": user_id},
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values={"display_name": display_name, "avatar_url": avatar_url},
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lock=False, # We're only inserter
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)
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if isinstance(self.database_engine, PostgresEngine):
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# We weight the localpart most highly, then display name and finally
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# server name
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if self.database_engine.can_native_upsert:
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sql = """
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INSERT INTO user_directory_search(user_id, vector)
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VALUES (?,
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setweight(to_tsvector('english', ?), 'A')
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|| setweight(to_tsvector('english', ?), 'D')
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|| setweight(to_tsvector('english', COALESCE(?, '')), 'B')
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) ON CONFLICT (user_id) DO UPDATE SET vector=EXCLUDED.vector
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"""
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txn.execute(
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sql,
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(
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user_id,
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get_localpart_from_id(user_id),
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get_domain_from_id(user_id),
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display_name,
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),
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)
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else:
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# TODO: Remove this code after we've bumped the minimum version
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# of postgres to always support upserts, so we can get rid of
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# `new_entry` usage
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if new_entry is True:
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sql = """
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INSERT INTO user_directory_search(user_id, vector)
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VALUES (?,
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setweight(to_tsvector('english', ?), 'A')
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|| setweight(to_tsvector('english', ?), 'D')
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|| setweight(to_tsvector('english', COALESCE(?, '')), 'B')
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)
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"""
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txn.execute(
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sql,
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(
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user_id,
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get_localpart_from_id(user_id),
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get_domain_from_id(user_id),
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display_name,
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),
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)
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elif new_entry is False:
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sql = """
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UPDATE user_directory_search
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SET vector = setweight(to_tsvector('english', ?), 'A')
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|| setweight(to_tsvector('english', ?), 'D')
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|| setweight(to_tsvector('english', COALESCE(?, '')), 'B')
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WHERE user_id = ?
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"""
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txn.execute(
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sql,
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(
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get_localpart_from_id(user_id),
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get_domain_from_id(user_id),
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display_name,
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user_id,
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),
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)
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else:
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raise RuntimeError(
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"upsert returned None when 'can_native_upsert' is False"
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)
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elif isinstance(self.database_engine, Sqlite3Engine):
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value = "%s %s" % (user_id, display_name) if display_name else user_id
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self._simple_upsert_txn(
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txn,
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table="user_directory_search",
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keyvalues={"user_id": user_id},
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values={"value": value},
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lock=False, # We're only inserter
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)
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else:
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# This should be unreachable.
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raise Exception("Unrecognized database engine")
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txn.call_after(self.get_user_in_directory.invalidate, (user_id,))
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return self.runInteraction(
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"update_profile_in_user_dir", _update_profile_in_user_dir_txn
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)
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def remove_from_user_dir(self, user_id):
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def _remove_from_user_dir_txn(txn):
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self._simple_delete_txn(
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txn, table="user_directory", keyvalues={"user_id": user_id}
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)
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self._simple_delete_txn(
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txn, table="user_directory_search", keyvalues={"user_id": user_id}
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)
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self._simple_delete_txn(
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txn, table="users_in_public_rooms", keyvalues={"user_id": user_id}
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)
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self._simple_delete_txn(
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txn,
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table="users_who_share_private_rooms",
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keyvalues={"user_id": user_id},
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)
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self._simple_delete_txn(
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txn,
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table="users_who_share_private_rooms",
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keyvalues={"other_user_id": user_id},
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)
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txn.call_after(self.get_user_in_directory.invalidate, (user_id,))
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return self.runInteraction("remove_from_user_dir", _remove_from_user_dir_txn)
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@defer.inlineCallbacks
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def get_users_in_dir_due_to_room(self, room_id):
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"""Get all user_ids that are in the room directory because they're
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in the given room_id
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"""
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user_ids_share_pub = yield self._simple_select_onecol(
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table="users_in_public_rooms",
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keyvalues={"room_id": room_id},
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retcol="user_id",
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desc="get_users_in_dir_due_to_room",
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)
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user_ids_share_priv = yield self._simple_select_onecol(
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table="users_who_share_private_rooms",
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keyvalues={"room_id": room_id},
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retcol="other_user_id",
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desc="get_users_in_dir_due_to_room",
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)
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user_ids = set(user_ids_share_pub)
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user_ids.update(user_ids_share_priv)
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return user_ids
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def add_users_who_share_private_room(self, room_id, user_id_tuples):
|
|
"""Insert entries into the users_who_share_private_rooms table. The first
|
|
user should be a local user.
|
|
|
|
Args:
|
|
room_id (str)
|
|
user_id_tuples([(str, str)]): iterable of 2-tuple of user IDs.
|
|
"""
|
|
|
|
def _add_users_who_share_room_txn(txn):
|
|
self._simple_upsert_many_txn(
|
|
txn,
|
|
table="users_who_share_private_rooms",
|
|
key_names=["user_id", "other_user_id", "room_id"],
|
|
key_values=[
|
|
(user_id, other_user_id, room_id)
|
|
for user_id, other_user_id in user_id_tuples
|
|
],
|
|
value_names=(),
|
|
value_values=None,
|
|
)
|
|
|
|
return self.runInteraction(
|
|
"add_users_who_share_room", _add_users_who_share_room_txn
|
|
)
|
|
|
|
def add_users_in_public_rooms(self, room_id, user_ids):
|
|
"""Insert entries into the users_who_share_private_rooms table. The first
|
|
user should be a local user.
|
|
|
|
Args:
|
|
room_id (str)
|
|
user_ids (list[str])
|
|
"""
|
|
|
|
def _add_users_in_public_rooms_txn(txn):
|
|
|
|
self._simple_upsert_many_txn(
|
|
txn,
|
|
table="users_in_public_rooms",
|
|
key_names=["user_id", "room_id"],
|
|
key_values=[(user_id, room_id) for user_id in user_ids],
|
|
value_names=(),
|
|
value_values=None,
|
|
)
|
|
|
|
return self.runInteraction(
|
|
"add_users_in_public_rooms", _add_users_in_public_rooms_txn
|
|
)
|
|
|
|
def remove_user_who_share_room(self, user_id, room_id):
|
|
"""
|
|
Deletes entries in the users_who_share_*_rooms table. The first
|
|
user should be a local user.
|
|
|
|
Args:
|
|
user_id (str)
|
|
room_id (str)
|
|
"""
|
|
|
|
def _remove_user_who_share_room_txn(txn):
|
|
self._simple_delete_txn(
|
|
txn,
|
|
table="users_who_share_private_rooms",
|
|
keyvalues={"user_id": user_id, "room_id": room_id},
|
|
)
|
|
self._simple_delete_txn(
|
|
txn,
|
|
table="users_who_share_private_rooms",
|
|
keyvalues={"other_user_id": user_id, "room_id": room_id},
|
|
)
|
|
self._simple_delete_txn(
|
|
txn,
|
|
table="users_in_public_rooms",
|
|
keyvalues={"user_id": user_id, "room_id": room_id},
|
|
)
|
|
|
|
return self.runInteraction(
|
|
"remove_user_who_share_room", _remove_user_who_share_room_txn
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_user_dir_rooms_user_is_in(self, user_id):
|
|
"""
|
|
Returns the rooms that a user is in.
|
|
|
|
Args:
|
|
user_id(str): Must be a local user
|
|
|
|
Returns:
|
|
list: user_id
|
|
"""
|
|
rows = yield self._simple_select_onecol(
|
|
table="users_who_share_private_rooms",
|
|
keyvalues={"user_id": user_id},
|
|
retcol="room_id",
|
|
desc="get_rooms_user_is_in",
|
|
)
|
|
|
|
pub_rows = yield self._simple_select_onecol(
|
|
table="users_in_public_rooms",
|
|
keyvalues={"user_id": user_id},
|
|
retcol="room_id",
|
|
desc="get_rooms_user_is_in",
|
|
)
|
|
|
|
users = set(pub_rows)
|
|
users.update(rows)
|
|
return list(users)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_rooms_in_common_for_users(self, user_id, other_user_id):
|
|
"""Given two user_ids find out the list of rooms they share.
|
|
"""
|
|
sql = """
|
|
SELECT room_id FROM (
|
|
SELECT c.room_id FROM current_state_events AS c
|
|
INNER JOIN room_memberships AS m USING (event_id)
|
|
WHERE type = 'm.room.member'
|
|
AND m.membership = 'join'
|
|
AND state_key = ?
|
|
) AS f1 INNER JOIN (
|
|
SELECT c.room_id FROM current_state_events AS c
|
|
INNER JOIN room_memberships AS m USING (event_id)
|
|
WHERE type = 'm.room.member'
|
|
AND m.membership = 'join'
|
|
AND state_key = ?
|
|
) f2 USING (room_id)
|
|
"""
|
|
|
|
rows = yield self._execute(
|
|
"get_rooms_in_common_for_users", None, sql, user_id, other_user_id
|
|
)
|
|
|
|
return [room_id for room_id, in rows]
|
|
|
|
def delete_all_from_user_dir(self):
|
|
"""Delete the entire user directory
|
|
"""
|
|
|
|
def _delete_all_from_user_dir_txn(txn):
|
|
txn.execute("DELETE FROM user_directory")
|
|
txn.execute("DELETE FROM user_directory_search")
|
|
txn.execute("DELETE FROM users_in_public_rooms")
|
|
txn.execute("DELETE FROM users_who_share_private_rooms")
|
|
txn.call_after(self.get_user_in_directory.invalidate_all)
|
|
|
|
return self.runInteraction(
|
|
"delete_all_from_user_dir", _delete_all_from_user_dir_txn
|
|
)
|
|
|
|
@cached()
|
|
def get_user_in_directory(self, user_id):
|
|
return self._simple_select_one(
|
|
table="user_directory",
|
|
keyvalues={"user_id": user_id},
|
|
retcols=("display_name", "avatar_url"),
|
|
allow_none=True,
|
|
desc="get_user_in_directory",
|
|
)
|
|
|
|
def get_user_directory_stream_pos(self):
|
|
return self._simple_select_one_onecol(
|
|
table="user_directory_stream_pos",
|
|
keyvalues={},
|
|
retcol="stream_id",
|
|
desc="get_user_directory_stream_pos",
|
|
)
|
|
|
|
def update_user_directory_stream_pos(self, stream_id):
|
|
return self._simple_update_one(
|
|
table="user_directory_stream_pos",
|
|
keyvalues={},
|
|
updatevalues={"stream_id": stream_id},
|
|
desc="update_user_directory_stream_pos",
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def search_user_dir(self, user_id, search_term, limit):
|
|
"""Searches for users in directory
|
|
|
|
Returns:
|
|
dict of the form::
|
|
|
|
{
|
|
"limited": <bool>, # whether there were more results or not
|
|
"results": [ # Ordered by best match first
|
|
{
|
|
"user_id": <user_id>,
|
|
"display_name": <display_name>,
|
|
"avatar_url": <avatar_url>
|
|
}
|
|
]
|
|
}
|
|
"""
|
|
|
|
if self.hs.config.user_directory_search_all_users:
|
|
join_args = (user_id,)
|
|
where_clause = "user_id != ?"
|
|
else:
|
|
join_args = (user_id,)
|
|
where_clause = """
|
|
(
|
|
EXISTS (select 1 from users_in_public_rooms WHERE user_id = t.user_id)
|
|
OR EXISTS (
|
|
SELECT 1 FROM users_who_share_private_rooms
|
|
WHERE user_id = ? AND other_user_id = t.user_id
|
|
)
|
|
)
|
|
"""
|
|
|
|
if isinstance(self.database_engine, PostgresEngine):
|
|
full_query, exact_query, prefix_query = _parse_query_postgres(search_term)
|
|
|
|
# We order by rank and then if they have profile info
|
|
# The ranking algorithm is hand tweaked for "best" results. Broadly
|
|
# the idea is we give a higher weight to exact matches.
|
|
# The array of numbers are the weights for the various part of the
|
|
# search: (domain, _, display name, localpart)
|
|
sql = """
|
|
SELECT d.user_id AS user_id, display_name, avatar_url
|
|
FROM user_directory_search as t
|
|
INNER JOIN user_directory AS d USING (user_id)
|
|
WHERE
|
|
%s
|
|
AND vector @@ to_tsquery('english', ?)
|
|
ORDER BY
|
|
(CASE WHEN d.user_id IS NOT NULL THEN 4.0 ELSE 1.0 END)
|
|
* (CASE WHEN display_name IS NOT NULL THEN 1.2 ELSE 1.0 END)
|
|
* (CASE WHEN avatar_url IS NOT NULL THEN 1.2 ELSE 1.0 END)
|
|
* (
|
|
3 * ts_rank_cd(
|
|
'{0.1, 0.1, 0.9, 1.0}',
|
|
vector,
|
|
to_tsquery('english', ?),
|
|
8
|
|
)
|
|
+ ts_rank_cd(
|
|
'{0.1, 0.1, 0.9, 1.0}',
|
|
vector,
|
|
to_tsquery('english', ?),
|
|
8
|
|
)
|
|
)
|
|
DESC,
|
|
display_name IS NULL,
|
|
avatar_url IS NULL
|
|
LIMIT ?
|
|
""" % (
|
|
where_clause,
|
|
)
|
|
args = join_args + (full_query, exact_query, prefix_query, limit + 1)
|
|
elif isinstance(self.database_engine, Sqlite3Engine):
|
|
search_query = _parse_query_sqlite(search_term)
|
|
|
|
sql = """
|
|
SELECT d.user_id AS user_id, display_name, avatar_url
|
|
FROM user_directory_search as t
|
|
INNER JOIN user_directory AS d USING (user_id)
|
|
WHERE
|
|
%s
|
|
AND value MATCH ?
|
|
ORDER BY
|
|
rank(matchinfo(user_directory_search)) DESC,
|
|
display_name IS NULL,
|
|
avatar_url IS NULL
|
|
LIMIT ?
|
|
""" % (
|
|
where_clause,
|
|
)
|
|
args = join_args + (search_query, limit + 1)
|
|
else:
|
|
# This should be unreachable.
|
|
raise Exception("Unrecognized database engine")
|
|
|
|
results = yield self._execute(
|
|
"search_user_dir", self.cursor_to_dict, sql, *args
|
|
)
|
|
|
|
limited = len(results) > limit
|
|
|
|
return {"limited": limited, "results": results}
|
|
|
|
|
|
def _parse_query_sqlite(search_term):
|
|
"""Takes a plain unicode string from the user and converts it into a form
|
|
that can be passed to database.
|
|
We use this so that we can add prefix matching, which isn't something
|
|
that is supported by default.
|
|
|
|
We specifically add both a prefix and non prefix matching term so that
|
|
exact matches get ranked higher.
|
|
"""
|
|
|
|
# Pull out the individual words, discarding any non-word characters.
|
|
results = re.findall(r"([\w\-]+)", search_term, re.UNICODE)
|
|
return " & ".join("(%s* OR %s)" % (result, result) for result in results)
|
|
|
|
|
|
def _parse_query_postgres(search_term):
|
|
"""Takes a plain unicode string from the user and converts it into a form
|
|
that can be passed to database.
|
|
We use this so that we can add prefix matching, which isn't something
|
|
that is supported by default.
|
|
"""
|
|
|
|
# Pull out the individual words, discarding any non-word characters.
|
|
results = re.findall(r"([\w\-]+)", search_term, re.UNICODE)
|
|
|
|
both = " & ".join("(%s:* | %s)" % (result, result) for result in results)
|
|
exact = " & ".join("%s" % (result,) for result in results)
|
|
prefix = " & ".join("%s:*" % (result,) for result in results)
|
|
|
|
return both, exact, prefix
|