number of each instrument on the event view

calendrier/templates/calendrier/view_event.html

@@ -67,4 +67,22 @@
     <p><a href="{% url 'calendrier:reponse' event.id %}">Répondre à l'événement</a></p>
   </div>
 {% endif %}
+
+{% if instrument_count %}
+  <table>
+    <tr>
+      <th>Instrument</th>
+      <th>Oui</th>
+      <th>Peut-être</th>
+    </tr>
+    {% for instrument, sure, maybe in instrument_count %}
+      <tr>
+        <td>{{ instrument }}</td>
+        <td>{{ sure }}</td>
+        <td>{{ maybe }}</td>
+      </tr>
+    {% endfor %}
+  </table>
+{% endif %}
+
 {% endblock %}

calendrier/views.py

@@ -1,7 +1,9 @@
+from collections import defaultdict
 from datetime import date, datetime
 
 from django.shortcuts import render, redirect, get_object_or_404
 from django.contrib.sites.shortcuts import get_current_site
+from django.db.models import Count
 from django.utils.safestring import mark_safe
 from django.views.generic import UpdateView, DeleteView
 from django.urls import reverse, reverse_lazy
@@ -71,14 +73,29 @@ def calendar(request, pYear, pMonth):
 
 def view_event(request, id):
     event = get_object_or_404(Event, id=id)
+    participants = event.participants_set.all()
 
     # Restricted event, only erneso users can see it
     if not request.user.is_authenticated and not event.calendrier:
         return redirect(reverse('calendrier:home'))
 
-    participants = event.participants_set.all()
+    # Count the number of occurences of each instrument
+    instrument_count = defaultdict(lambda: (0, 0))
+    for participant in participants:
+        instrument = participant.participant.instru
+        sure, maybe = instrument_count[instrument]
+        if participant.reponse == "oui":
+            instrument_count[instrument] = (sure + 1, maybe)
+        elif participant.reponse == "pe":
+            instrument_count[instrument] = (sure, maybe + 1)
+    instrument_count = [
+        (instrument, sure, maybe)
+        for instrument, (sure, maybe) in instrument_count.items()
+    ]
+
     context = {
         "event": event,
+        "instrument_count": instrument_count,
         "participants": participants,
         "nboui": len(participants.filter(reponse="oui")),
         "nbpe": len(participants.filter(reponse="pe")),