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

1 files changed, 24 insertions, 0 deletions

diff --git a/openstack_dashboard/management/commands/cleanup_angular_template_cache.py b/openstack_dashboard/management/commands/cleanup_angular_template_cache.py
new file mode 100644
index 000000000..8b7b9dbbd
--- /dev/null
+++ b/openstack_dashboard/management/commands/cleanup_angular_template_cache.py
@@ -0,0 +1,24 @@
+# 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.management.base import BaseCommand
+
+from horizon import cache
+
+
+class Command(BaseCommand):
+    help = 'Clears template cache for angularized views.'
+
+    def handle(self, *args, **options):
+        for theme in settings.AVAILABLE_THEMES:
+            cache.cleanup_angular_template_cache(theme[0])