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Merge pull request #2219 from krombel/avoid_duplicate_filters

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only add new filter when not existent prevoisly
This commit is contained in:
Erik Johnston 2017-06-21 14:11:26 +01:00 committed by GitHub
commit 71995e1397
1 changed files with 11 additions and 1 deletions
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12
synapse/storage/filtering.py
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@ -19,6 +19,7 @@ from ._base import SQLBaseStore
from synapse.api.errors import SynapseError, Codes
from synapse.util.caches.descriptors import cachedInlineCallbacks
from canonicaljson import encode_canonical_json
import simplejson as json
@ -46,11 +47,20 @@ class FilteringStore(SQLBaseStore):
defer.returnValue(json.loads(str(def_json).decode("utf-8")))
def add_user_filter(self, user_localpart, user_filter):
def_json = json.dumps(user_filter).encode("utf-8")
def_json = encode_canonical_json(user_filter)
# Need an atomic transaction to SELECT the maximal ID so far then
# INSERT a new one
def _do_txn(txn):
sql = (
"SELECT filter_id FROM user_filters "
"WHERE user_id = ? AND filter_json = ?"
)
txn.execute(sql, (user_localpart, def_json))
filter_id_response = txn.fetchone()
if filter_id_response is not None:
return filter_id_response[0]
sql = (
"SELECT MAX(filter_id) FROM user_filters "
"WHERE user_id = ?"