Small improvements on statistics page (#3820)

* Fixed messy pizza chart to top 10 and added pie chart top 10 borrel orders

* Removed unnecessary line

* Update website/members/views.py

---------

Co-authored-by: Dirk Doesburg <[email protected]>

website/members/services.py

@@ -123,8 +123,8 @@ def gen_stats_member_type() -> dict[str, list]:
 
 
 def gen_stats_year() -> dict[str, list]:
-    """Generate statistics on how many members (and other membership types) there were in each cohort."""
-    years = range(2015, datetime_to_lectureyear(date.today()))
+    """Generate statistics on how many members (and other membership types) there were in each year."""
+    years = range(2015, datetime_to_lectureyear(date.today()) + 1)
 
     data = {
         "labels": list(years),
@@ -137,9 +137,10 @@ def gen_stats_year() -> dict[str, list]:
     for index, (key, _) in enumerate(Membership.MEMBERSHIP_TYPES):
         for year in years:
             data["datasets"][index]["data"].append(
-                Membership.objects.filter(since__lte=date(year=year, month=9, day=1))
+                Membership.objects.filter(since__lte=date(year=year, month=10, day=1))
                 .filter(
-                    Q(until__isnull=True) | Q(until__gt=date(year=year, month=9, day=1))
+                    Q(until__isnull=True)
+                    | Q(until__gt=date(year=year, month=10, day=1))
                 )
                 .filter(type=key)
                 .count()

website/members/templates/members/statistics.html

@@ -20,7 +20,7 @@ <h2 class="mb-4">{% trans "Total amount of Thalia members" %}: {{ total_members
         <div class="col-6 ">
             <canvas id="total-year-chart"
                     data-data="{{ cohort_sizes }}"
-                    data-title="Membership Types (previous cohorts)"
+                    data-title="Membership Types per year"
                     data-chart-type="bar">
             </canvas>
         </div>
@@ -46,10 +46,16 @@ <h2 class="mb-4">{% trans "Total amount of Thalia members" %}: {{ total_members
         <div class="col-6">
             <canvas id="pizza-total-type-chart"
                     data-data="{{ total_pizza_orders }}"
-                    data-title="Pizza Orders"
+                    data-title="Top 10 Pizza Orders"
                     data-chart-type="pie">
             </canvas>
         </div>
+        <div class="col-6">
+            <canvas id="borrel-total-type-chart"
+                    data-data="{{ total_sales_orders }}"
+                    data-title="Top 10 Borrel Orders"
+                    data-chart-type="pie">
+        </div>
         <div class="col-6">
             <canvas id="active-members-chart"
                     data-data="{{ active_members }}"

website/members/views.py

@@ -19,6 +19,7 @@
 import activemembers.services as activemembers_services
 import events.services as event_services
 import pizzas.services
+import sales.services
 from members import emails, services
 from members.decorators import membership_required
 from members.models import EmailChange, Member, Membership, Profile
@@ -212,6 +213,9 @@ def get_context_data(self, **kwargs) -> dict:
                 "total_pizza_orders": json.dumps(
                     pizzas.services.gen_stats_pizza_orders()
                 ),
+                "total_sales_orders": json.dumps(
+                    sales.services.gen_stats_sales_orders()
+                ),
                 "active_members": json.dumps(services.gen_stats_active_members()),
             }
         )

website/pizzas/services.py

@@ -1,3 +1,4 @@
+from django.db.models import Count
 from django.utils import timezone
 
 from events.services import is_organiser
@@ -14,12 +15,13 @@ def gen_stats_pizza_orders() -> dict:
         ],
     }
 
-    for product in Product.objects.all():
-        orders = FoodOrder.objects.filter(product=product).count()
-
-        if orders > 0:
-            data["labels"].append(product.name)
-            data["datasets"][0]["data"].append(orders)
+    for product in (
+        Product.objects.annotate(count=Count("foodorder"))
+        .filter(count__gt=0)
+        .order_by("-count")[:10]
+    ):
+        data["labels"].append(product.name)
+        data["datasets"][0]["data"].append(product.count)
 
     return data
 

website/sales/services.py

@@ -1,6 +1,7 @@
+from django.db.models import Sum
 from django.utils import timezone
 
-from sales.models.order import Order
+from sales.models.order import Order, OrderItem
 
 
 def is_adult(member):
@@ -33,3 +34,25 @@ def execute_data_minimisation(dry_run=False):
     if not dry_run:
         queryset.update(payer=None)
     return queryset.all()
+
+
+def gen_stats_sales_orders() -> dict:
+    """Generate statistics about number of orders per product."""
+    data = {
+        "labels": [],
+        "datasets": [
+            {"data": []},
+        ],
+    }
+
+    for product, count in (
+        OrderItem.objects.values("product_name")
+        .annotate(count=Sum("amount"))
+        .filter(count__gt=0)
+        .order_by("-count")
+        .values_list("product_name", "count")[:10]
+    ):
+        data["labels"].append(product)
+        data["datasets"][0]["data"].append(count)
+
+    return data