enhancement: Cache DB calls for card template

Signed-off-by: Rommel Terrence Juanillo <terrence@newlogic.com>

.envs/.local/.django

@@ -4,3 +4,4 @@ USE_DOCKER=yes
 IPYTHONDIR=/app/.ipython
 CELERY_BROKER_URL=redis://redis:6379/0
 CELERY_RESULT_BACKEND=redis://redis:6379/0
+REDIS_URL=redis://redis:6379/1

card_generator/api/v1/cards/views.py

@@ -1,6 +1,7 @@
 import logging
 
 from django.conf import settings
+from django.core.cache import cache
 from drf_spectacular.utils import OpenApiExample, extend_schema, extend_schema_view
 from rest_framework.authentication import TokenAuthentication
 from rest_framework.decorators import action
@@ -34,6 +35,14 @@ class CardViewSet(ModelViewSet):
     authentication_classes = (TokenAuthentication,)
     http_method_names = ("get", "post", "put", "delete")
 
+    def get_object(self):
+        card_data = cache.get("card_data")
+        if not card_data:
+            card_data = super().get_object()
+            cache.set("card_data", card_data, 600)
+
+        return card_data
+
     @action(
         methods=["post"],
         detail=True,

config/settings/base.py

@@ -1,6 +1,7 @@
 """
 Base settings to build other settings files upon.
 """
+
 from pathlib import Path
 
 import environ
@@ -10,8 +11,7 @@
 APPS_DIR = ROOT_DIR / "card_generator"
 env = environ.Env()
 
-READ_DOT_ENV_FILE = env.bool("DJANGO_READ_DOT_ENV_FILE", default=False)
-if READ_DOT_ENV_FILE:
+if READ_DOT_ENV_FILE := env.bool("DJANGO_READ_DOT_ENV_FILE", default=False):
     # OS environment variables take precedence over variables from .env
     env.read_env(str(ROOT_DIR / ".env"))
 
@@ -190,6 +190,28 @@
     }
 ]
 
+# CACHES
+# ------------------------------------------------------------------------------
+CACHE_TTL = env.int("CACHE_TTL", default=600)
+DEFAULT_TIMEOUT = (
+    CACHE_TTL  # Backwards compatibility, django_redis use this instead of CACHE_TTL
+)
+REDIS_URL = env.str("REDIS_URL", default=None)
+if REDIS_URL:
+    CACHES = {
+        "default": {
+            "BACKEND": "django_redis.cache.RedisCache",
+            "LOCATION": REDIS_URL,
+            "OPTIONS": {
+                "CLIENT_CLASS": "django_redis.client.DefaultClient",
+                # Mimicing memcache behavior.
+                # https://github.com/jazzband/django-redis#memcached-exceptions-behavior
+                "IGNORE_EXCEPTIONS": True,
+            },
+        }
+    }
+
+
 # https://docs.djangoproject.com/en/dev/ref/settings/#form-renderer
 FORM_RENDERER = "django.forms.renderers.TemplatesSetting"
 

config/settings/production.py

@@ -1,3 +1,4 @@
+# sourcery skip: use-named-expression
 import logging
 
 import sentry_sdk
@@ -21,23 +22,6 @@
 DATABASES["default"]["ATOMIC_REQUESTS"] = True  # noqa F405
 DATABASES["default"]["CONN_MAX_AGE"] = env.int("CONN_MAX_AGE", default=60)  # noqa F405
 
-# CACHES
-# ------------------------------------------------------------------------------
-REDIS_URL = env.str("REDIS_URL", default=None)
-if REDIS_URL:
-    CACHES = {
-        "default": {
-            "BACKEND": "django_redis.cache.RedisCache",
-            "LOCATION": REDIS_URL,
-            "OPTIONS": {
-                "CLIENT_CLASS": "django_redis.client.DefaultClient",
-                # Mimicing memcache behavior.
-                # https://github.com/jazzband/django-redis#memcached-exceptions-behavior
-                "IGNORE_EXCEPTIONS": True,
-            },
-        }
-    }
-
 # SECURITY
 # ------------------------------------------------------------------------------
 # https://docs.djangoproject.com/en/dev/ref/settings/#secure-proxy-ssl-header