Merge pull request #1289 from ae-utbm/product_history

Product history

counter/admin.py

@@ -39,8 +39,9 @@ class ProductAdmin(SearchModelAdmin):
         "code",
         "product_type",
         "selling_price",
-        "profit",
         "archived",
+        "created_at",
+        "updated_at",
     )
     list_select_related = ("product_type",)
     search_fields = ("name", "code")

counter/migrations/0036_product_created_at_product_updated_at.py

@@ -0,0 +1,67 @@
+# Generated by Django 5.2.8 on 2026-02-10 15:40
+from operator import attrgetter
+
+import django.utils.timezone
+from django.db import migrations, models
+from django.db.migrations.state import StateApps
+from django.db.models import OuterRef, Subquery
+
+from counter.models import Selling
+
+
+def apply_product_history_dates(apps: StateApps, schema_editor):
+    """Approximate a posteriori the value of created_at and updated_at."""
+    Product = apps.get_model("counter", "Product")
+    sales_subquery = Selling.objects.filter(product=OuterRef("pk")).values("date")
+
+    # for products that have an associated sale, we set the creation date
+    # to the one of the first sale, and the update date to the one of the last sale
+    products = list(
+        Product.objects.exclude(sellings=None)
+        .annotate(
+            new_created_at=Subquery(sales_subquery.order_by("date")[:1]),
+            new_updated_at=Subquery(sales_subquery.order_by("-date")[:1]),
+        )
+        .only("id")
+    )
+    for product in products:
+        product.created_at = product.new_created_at
+        product.updated_at = product.new_updated_at
+
+    # For the remaining products (those without sale),
+    # they are given the creation and update date of the previous product having sales.
+    products_without_sale = list(Product.objects.filter(sellings=None).only("id"))
+    for product in products_without_sale:
+        previous_product = max(
+            (p for p in products if p.id < product.id), key=attrgetter("id")
+        )
+        product.created_at = previous_product.created_at
+        product.updated_at = previous_product.updated_at
+    products.extend(products_without_sale)
+
+    Product.objects.bulk_update(products, fields=["created_at", "updated_at"])
+
+
+class Migration(migrations.Migration):
+    dependencies = [("counter", "0035_remove_selling_is_validated_and_more")]
+
+    operations = [
+        migrations.AddField(
+            model_name="product",
+            name="created_at",
+            field=models.DateTimeField(
+                auto_now_add=True,
+                default=django.utils.timezone.now,
+                verbose_name="created at",
+            ),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name="product",
+            name="updated_at",
+            field=models.DateTimeField(auto_now=True, verbose_name="updated at"),
+        ),
+        migrations.RunPython(
+            apply_product_history_dates, reverse_code=migrations.RunPython.noop
+        ),
+    ]

counter/models.py

@@ -399,6 +399,8 @@ class Product(models.Model):
         Group, related_name="products", verbose_name=_("buying groups"), blank=True
     )
     archived = models.BooleanField(_("archived"), default=False)
+    created_at = models.DateTimeField(_("created at"), auto_now_add=True)
+    updated_at = models.DateTimeField(_("updated at"), auto_now=True)
 
     class Meta:
         verbose_name = _("product")

counter/templates/counter/product_form.jinja

@@ -3,6 +3,8 @@
 {% block content %}
   {% if object %}
     <h2>{% trans name=object %}Edit product {{ name }}{% endtrans %}</h2>
+    <p><i>{% trans %}Creation date{% endtrans %} : {{ object.created_at|date }}</i></p>
+    <p><i>{% trans %}Last update{% endtrans %} : {{ object.updated_at|date }}</i></p>
   {% else %}
     <h2>{% trans %}Product creation{% endtrans %}</h2>
   {% endif %}

locale/fr/LC_MESSAGES/django.po

@@ -1566,7 +1566,7 @@ msgstr "Visiteur"
 msgid "ban type"
 msgstr "type de ban"
 
-#: core/models.py
+#: core/models.py counter/models.py
 msgid "created at"
 msgstr "créé le"
 
@@ -3109,6 +3109,10 @@ msgstr "groupe d'achat"
 msgid "archived"
 msgstr "archivé"
 
+#: counter/models.py
+msgid "updated at"
+msgstr "mis à jour le"
+
 #: counter/models.py
 msgid "product"
 msgstr "produit"
@@ -3664,6 +3668,14 @@ msgstr ""
 msgid "Edit product %(name)s"
 msgstr "Édition du produit %(name)s"
 
+#: counter/templates/counter/product_form.jinja
+msgid "Creation date"
+msgstr "Date de création"
+
+#: counter/templates/counter/product_form.jinja
+msgid "Last update"
+msgstr "Dernière mise à jour"
+
 #: counter/templates/counter/product_form.jinja
 msgid "Product creation"
 msgstr "Création de produit"