horizon/horizon/cache.py
Ivan Kolodyazhny 0d290b9184 Fix django-compress caching issues
django-compress doesn't work well with cache. If horizon is
deployed in a containarized environment with pre-built static
in images, django-compress tries to load old templates from cache.

This patch introduces following changes:

* update_angular_template_hash uses the correct Django cache backend now
* fixed cache cleanup for memcached backend
* added clean_angular_template_cache management command to clean cache
  manually without executing heavy 'compress' command.

Closes-Bug: #1874657
Change-Id: If1fd61fa2e4b36e22797b0f54ac067a2a937f369
2020-06-15 17:33:16 +03:00

34 lines
1.3 KiB
Python

# 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.
from django.conf import settings
from django.core.cache import caches
from django.core.cache.utils import make_template_fragment_key
def cleanup_angular_template_cache(theme):
# The compressor has modified the angular template cache preloads
# which are cached in the 'COMPRESS_CACHE_BACKEND' Django cache.
django_cache = caches[settings.COMPRESS_CACHE_BACKEND]
# generate the same key as used in _scripts.html when caching the
# preloads
key = make_template_fragment_key(
"angular",
['template_cache_preloads', theme]
)
# if template preloads have been cached, clear them
if django_cache.get(key):
# Set to None because memcached doesn't remove records immediately
django_cache.set(key, None)