4 - Aggregate & Annotate

src/analytics/templates/analytics/sales.html

@@ -12,7 +12,7 @@ <h1>Sales Data</h1>
 
 <div class='row'>
     <div class='col'>
-        <p>Recent Total: ${{ recent_orders_total }}</p>
+        <p>Recent Total: ${{ recent_orders_total.total__sum }}</p>
         <ol>
         {% for order in recent_orders %}
             <li>{{ order.order_id }}

src/analytics/views.py

@@ -1,4 +1,5 @@
 from django.contrib.auth.mixins import LoginRequiredMixin
+from django.db.models import Count, Sum, Avg
 from django.http import HttpResponse
 from django.views.generic import TemplateView
 from django.shortcuts import render
@@ -22,11 +23,18 @@ def get_context_data(self, *args, **kwargs):
         qs = Order.objects.all()
         context['orders'] = qs
         context['recent_orders'] = qs.recent().not_refunded()[:5]
-        recent_orders_total = 0
-        for i in context['recent_orders']:
-            recent_orders_total += i.total
-        context['recent_orders_total'] = recent_orders_total
-
+        context['recent_orders_total'] = context['recent_orders'].aggregate(
+                                        Sum("total"), 
+                                        Avg("total"), 
+                                        # Avg("cart__products__price"), 
+                                        # Count("cart__products")
+                                    )
+        # context['recent_cart_data'] = context['recent_orders'].aggregate(
+        #                                 Avg("cart__products__price"), 
+        #                                 Count("cart__products")
+        #                             )
+        # qs = Order.objects.all().aggregate(Sum("total"), Avg("total"), Avg("cart__products__price"), Count("cart__products"))
+        # ann = qs.annotate(product_avg=Avg('cart__products__price'), product_total = Sum('cart__products__price'), product__count = Count('cart__products'))
         context['shipped_orders'] = qs.recent().not_refunded().by_status(status='shipped')[:5]
         context['paid_orders'] = qs.recent().not_refunded().by_status(status='paid')[:5]
         return context