OKRS24-235 Added caching.

src/signal_documentation/settings.py

@@ -261,6 +261,8 @@
     }
 }
 
+CACHE_TIME = int(os.environ.get('CACHE_TIME', 60 * 60 * 24))  # 24 hours
+
 
 # Celery
 # https://docs.celeryq.dev/en/stable/index.html

src/signals/serializers.py

@@ -21,7 +21,7 @@ class SignalSerializer(ModelSerializer):
 
     links = LinkSerializer(many=True)
     pathogen = SlugRelatedField(many=True, read_only=True, slug_field='name')
-    signal_type = SlugRelatedField(many=True, read_only=True, slug_field='name')
+    signal_type = SlugRelatedField(read_only=True, slug_field='name')
     available_geography = SlugRelatedField(many=True, read_only=True, slug_field='name')
     category = SlugRelatedField(read_only=True, slug_field='name')
     source = SlugRelatedField(read_only=True, slug_field='name')

src/signals/urls.py

@@ -1,14 +1,16 @@
 from django.urls import path
 from django.urls.resolvers import URLPattern
+from django.views.decorators.cache import cache_page
 
 from signals.views import (
     SignalsDetailView,
     SignalsListApiView,
     SignalsListView,
 )
+from signal_documentation.settings import CACHE_TIME
 
 urlpatterns: list[URLPattern] = [
-    path('', SignalsListView.as_view(), name='signals'),
+    path('', cache_page(CACHE_TIME)(SignalsListView.as_view()), name='signals'),
     path('signals/<int:pk>/', SignalsDetailView.as_view(), name='signal'),
     path('signals/<pk>/', SignalsDetailView.as_view(), name='signal'),
 

src/signals/views.py

@@ -93,7 +93,17 @@ def get_context_data(self, **kwargs) -> Dict[str, Any]:
         context["url_params_str"] = url_params_str
         context["filter"] = SignalFilter(self.request.GET, queryset=self.get_queryset())
 
-        context["signals"] = self.get_queryset()
+        context["signals"] = self.get_queryset().prefetch_related(
+            "pathogen",
+            "available_geography",
+            "geographic_scope",
+            "source",
+        ).select_related(
+            "base",
+            "signal_type",
+            "category",
+            "license"
+        )
         return context