From 46e4a2d58503dd7c97056a4e543edcbc4e4ca353 Mon Sep 17 00:00:00 2001
From: Alban Gruin
Date: Thu, 26 Jan 2017 13:18:14 +0100
Subject: Ajout d'un extracteur de semaine pour les DateTimeField. Il marche
 pour PostgreSQL. Pour SQLite, on devra passer par une requête brute.

---
 models.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/models.py b/models.py
index 18e0246..62274d2 100644
--- a/models.py
+++ b/models.py
@@ -1,11 +1,17 @@
 from django.db import models
 from django.db.models import Q
+from django.db.models.functions import Extract
 from django.utils.text import slugify
 
 import hashlib
 import os
 
 
+@models.DateTimeField.register_lookup
+class ExtractWeek(Extract):
+    lookup_name = "week"
+
+
 class Timetable(models.Model):
     name = models.CharField(max_length=64, unique=True, verbose_name="nom")
     url = models.URLField(max_length=255, unique=True, verbose_name="URL")
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