Amélioration de la requête des tags

src/agenda_culturel/models.py

@@ -1,4 +1,4 @@
-from django.db import models
+from django.db import models, connection
 from django_better_admin_arrayfield.models.fields import ArrayField
 from django.utils.translation import gettext_lazy as _
 from django.utils.safestring import mark_safe
@@ -627,15 +627,13 @@ class Event(models.Model):
         permissions = [("set_duplicated_event", "Can set an event as duplicated")]
 
     def get_all_tags():
-        try:
-            tags = list(Event.objects.values_list("tags", flat=True))
-        except:
-            tags = []
-        uniq_tags = set()
-        for t in tags:
-            if t is not None:
-                uniq_tags = uniq_tags | set(t)
-        return list(uniq_tags)
+        cursor = connection.cursor()
+        raw_query = """
+        select unnest(subquery_alias.tags) as distinct_tags, count(*) as tags_group_by_count
+            from (select tags from agenda_culturel_event) as subquery_alias group by distinct_tags;
+        """
+        cursor.execute(raw_query)
+        return [{"tag": row[0], "count": row[1]} for row in cursor]
 
     def is_draft(self):
         return self.status == Event.STATUS.DRAFT

src/agenda_culturel/views.py

@@ -178,7 +178,7 @@ class EventFilter(django_filters.FilterSet):
 
     exclude_tags = django_filters.MultipleChoiceFilter(
         label="Exclure les étiquettes",
-        choices=[(t, t) for t in Event.get_all_tags()],
+        choices=[(t["tag"], t["tag"]) for t in Event.get_all_tags()],
         lookup_expr="icontains",
         field_name="tags",
         exclude=True,
@@ -187,7 +187,7 @@ class EventFilter(django_filters.FilterSet):
 
     tags = django_filters.MultipleChoiceFilter(
         label="Inclure les étiquettes",
-        choices=[(t, t) for t in Event.get_all_tags()],
+        choices=[(t["tag"], t["tag"]) for t in Event.get_all_tags()],
         lookup_expr="icontains",
         conjoined=True,
         field_name="tags",
@@ -2192,7 +2192,7 @@ def view_tag(request, t):
 
 
 def tag_list(request):
-    tags = Event.get_all_tags()
+    tags = [t["tag"] for t in Event.get_all_tags()]
     objects = Tag.objects.order_by("name").all()
     context = {"other_tags": sorted(tags, key=lambda x: remove_accents(x).lower()),
         "tags": objects}