purge sitetree cache on change

- matches our caching between dev/prod
- adds signal to purge sitetree caches on change

Note: we _should_ migrate to redis for caching, it wasn't around when we first added it

Author: ewdurbin

Makefile

@@ -16,6 +16,7 @@ help: ## Display this help text
 	mkdir -p .state && touch .state/db-migrated
 
 .state/db-initialized: .state/docker-build-web .state/db-migrated
+	docker compose run --rm web ./manage.py createcachetable
 	docker compose run --rm web ./manage.py loaddata fixtures/*.json
 	mkdir -p .state && touch .state/db-initialized
 

pydotorg/apps.py

@@ -0,0 +1,8 @@
+from django.apps import AppConfig
+
+
+class PyDotOrgConfig(AppConfig):
+    name = "pydotorg"
+
+    def ready(self):
+        import pydotorg.signals  # noqa: F401

pydotorg/settings/base.py

@@ -171,6 +171,7 @@
 ### Apps
 
 INSTALLED_APPS = [
+<<<<<<< HEAD
     "django.contrib.auth",
     "django.contrib.contenttypes",
     "django.contrib.sessions",
@@ -195,6 +196,7 @@
     "widget_tweaks",
     "django_countries",
     "sorl.thumbnail",
+    "pydotorg",
     "apps.banners",
     "apps.blogs",
     "apps.boxes",
@@ -215,6 +217,108 @@
     "apps.work_groups",
     "allauth",
     "allauth.account",
+||||||| parent of ac1d365e (purge sitetree cache on change)
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.sites',
+    'django.contrib.redirects',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'django.contrib.humanize',
+
+    'admin_interface',
+    'colorfield',
+    'django.contrib.admin',
+    'django.contrib.admindocs',
+
+    'django_celery_beat',
+    'django_translation_aliases',
+    'pipeline',
+    'sitetree',
+    'imagekit',
+    'haystack',
+    'honeypot',
+    'waffle',
+    'ordered_model',
+    'widget_tweaks',
+    'django_countries',
+    'sorl.thumbnail',
+
+    'banners',
+    'blogs',
+    'boxes',
+    'cms',
+    'codesamples',
+    'community',
+    'companies',
+    'downloads',
+    'events',
+    'jobs',
+    'mailing',
+    'minutes',
+    'nominations',
+    'pages',
+    'sponsors',
+    'successstories',
+    'users',
+    'work_groups',
+
+    'allauth',
+    'allauth.account',
+
+=======
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.sites',
+    'django.contrib.redirects',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'django.contrib.humanize',
+
+    'admin_interface',
+    'colorfield',
+    'django.contrib.admin',
+    'django.contrib.admindocs',
+
+    'django_celery_beat',
+    'django_translation_aliases',
+    'pipeline',
+    'sitetree',
+    'imagekit',
+    'haystack',
+    'honeypot',
+    'waffle',
+    'ordered_model',
+    'widget_tweaks',
+    'django_countries',
+    'sorl.thumbnail',
+
+    'pydotorg',
+    'banners',
+    'blogs',
+    'boxes',
+    'cms',
+    'codesamples',
+    'community',
+    'companies',
+    'downloads',
+    'events',
+    'jobs',
+    'mailing',
+    'minutes',
+    'nominations',
+    'pages',
+    'sponsors',
+    'successstories',
+    'users',
+    'work_groups',
+
+    'allauth',
+    'allauth.account',
+
+>>>>>>> ac1d365e (purge sitetree cache on change)
     # Tastypie needs the `users` app to be already loaded.
     "tastypie",
     "rest_framework",

pydotorg/settings/local.py

@@ -41,8 +41,8 @@
 
 CACHES = {
     "default": {
-        "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
-        "LOCATION": "pythondotorg-local-cache",
+        "BACKEND": "django.core.cache.backends.db.DatabaseCache",
+        "LOCATION": "django_cache_table",
     }
 }
 

pydotorg/signals.py

@@ -0,0 +1,14 @@
+from django.db.models.signals import m2m_changed, post_delete, post_save
+from django.dispatch import receiver
+
+from sitetree.models import Tree, TreeItem
+from sitetree.sitetreeapp import get_sitetree
+
+@receiver(post_save, sender=Tree)
+@receiver(post_save, sender=TreeItem)
+@receiver(post_delete, sender=TreeItem)
+@receiver(m2m_changed, sender=TreeItem.access_permissions)
+def purge_sitetree_cache(sender, instance, **kwargs):
+    cache_ = get_sitetree().cache
+    cache_.empty()
+    cache_.reset()