afficher et calculer le prix de la commande

la_chariotte/order/migrations/0019_order_price.py

@@ -0,0 +1,17 @@
+# Generated by Django 4.2 on 2023-05-15 09:33
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("order", "0018_order_articles_nb"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="order",
+            name="price",
+            field=models.DecimalField(decimal_places=2, default=0, max_digits=10),
+        ),
+    ]

la_chariotte/order/models.py

@@ -79,6 +79,7 @@ class Order(models.Model):
     )
     author = models.ForeignKey(OrderAuthor, on_delete=models.CASCADE)
     articles_nb = models.PositiveIntegerField(default=0)
+    price = models.DecimalField(max_digits=10, decimal_places=2, default=0)
 
     def __str__(self):  # pragma: no cover
         return f"Commande de {self.author} pour la commande groupée {self.grouped_order.pk}"
@@ -110,5 +111,8 @@ class OrderedItem(models.Model):
     )
     item = models.ForeignKey(Item, on_delete=models.CASCADE, related_name="orders")
 
+    def get_price(self):
+        return self.nb * self.item.price
+
     def __str__(self):  # pragma: no cover
         return f"{self.nb} {self.item}, dans la commande {self.order.pk}"

la_chariotte/order/templates/order/order_detail.html

@@ -14,11 +14,10 @@
 		<p><strong>Votre commande</strong></p>
     <ul>
         {% for item in order.ordered_items.all %}
-        {% if item.nb > 0 %}
-        <li>{{ item.nb }} {{ item.item }}</li>
-        {% endif %}
+        <li>{{ item.nb }} {{ item.item }} : {{ item.get_price }} €</li>
 				{% endfor %}
 		</ul>
+    <p>Prix total de la commande : <strong>{{ order.price }} €</strong>
 
 		<p>Rendez-vous le <strong>{{ order.grouped_order.delivery_date }}</strong> à <strong>{{ order.grouped_order.place }}</strong> pour récupérer vos produits !</p>
 

la_chariotte/order/views.py

@@ -141,6 +141,7 @@ def order(request, grouped_order_id):
         OrderedItem.objects.create(nb=v, order=order, item=item)
         compute_ordered_nb(item)
     compute_order_articles_nb(order)
+    compute_order_price(order)
     if order.articles_nb == 0:
         # Redisplay the order form for this grouped order.
         return render(
@@ -178,6 +179,15 @@ def compute_order_articles_nb(order):
     order.save()
 
 
+def compute_order_price(order):
+    """Computes the total price of the order"""
+    price = 0
+    for ord_item in order.ordered_items.all():
+        price += ord_item.get_price()
+    order.price = price
+    order.save()
+
+
 class OrderDetailView(generic.DetailView):
     """Confirmation page after a user orders"""