include week in archive view

app/item/models.py

@@ -7,6 +7,7 @@ import lxml.html
 from django.conf import settings
 from django.contrib.auth import get_user_model
 from django.db import models
+from django.db.models.functions import ExtractWeek, ExtractYear
 from django.urls import reverse
 from django.utils.timesince import timesince
 
@@ -64,7 +65,6 @@ class Item(models.Model):
         cal = now.date().isocalendar()
         monday = now.date() - timedelta(days=now.date().isocalendar().weekday - 1)
         monday = timezone.datetime(monday.year, monday.month, monday.day, tzinfo=now.tzinfo)
-        print(monday)
         first_post = qs.filter(published__gt=monday).first()
         if first_post and first_post.published < now:
             week = qs.filter(published__gt=monday)
@@ -76,7 +76,11 @@ class Item(models.Model):
         else:
             last_monday = monday - timedelta(days=7)
             week = qs.filter(published__gt=last_monday)
-        archive = qs.exclude(id__in=week)
+        archive = (qs
+            .exclude(id__in=week)
+            .annotate(year=ExtractYear('published'))
+            .annotate(week=ExtractWeek('published'))
+        )
         return week, archive
 
     def get_absolute_url(self):

app/templates/archive.html

@@ -1,6 +1,9 @@
 {% extends "base.html" %}
 {% block content %}
     {% for item in items %}
+        {% ifchanged item.week %}
+        <h2>{{ item.year }} week {{ item.week }}</h2>
+        {% endifchanged %}
         {% include "listitem.html" with item=item %}
     {% endfor %}
 {% endblock %}