Make ProductType an OrderedModel

counter/migrations/0028_alter_producttype_comment_and_more.py

@@ -0,0 +1,62 @@
+# Generated by Django 4.2.17 on 2024-12-15 17:53
+
+from django.db import migrations, models
+from django.db.migrations.state import StateApps
+
+
+def move_priority_to_order(apps: StateApps, schema_editor):
+    """Migrate the previous homemade `priority` to `OrderedModel.order`.
+
+    `priority` was a system were click managers set themselves the priority
+    of a ProductType.
+    The higher the priority, the higher it was to be displayed in the eboutic.
+    Multiple product types could share the same priority, in which
+    case they were ordered by alphabetic order.
+
+    The new field is unique per object, and works in the other way :
+    the nearer from 0, the higher it should appear.
+    """
+    ProductType = apps.get_model("counter", "ProductType")
+    product_types = list(ProductType.objects.order_by("-priority", "name"))
+    for order, product_type in enumerate(product_types):
+        product_type.order = order
+    ProductType.objects.bulk_update(product_types, ["order"])
+
+
+class Migration(migrations.Migration):
+    dependencies = [("counter", "0027_alter_refilling_payment_method")]
+
+    operations = [
+        migrations.AlterField(
+            model_name="producttype",
+            name="comment",
+            field=models.TextField(
+                default="",
+                help_text="A text that will be shown on the eboutic.",
+                verbose_name="comment",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="producttype",
+            name="description",
+            field=models.TextField(default="", verbose_name="description"),
+        ),
+        migrations.AlterModelOptions(
+            name="producttype",
+            options={"ordering": ["order"], "verbose_name": "product type"},
+        ),
+        migrations.AddField(
+            model_name="producttype",
+            name="order",
+            field=models.PositiveIntegerField(
+                db_index=True, default=0, editable=False, verbose_name="order"
+            ),
+            preserve_default=False,
+        ),
+        migrations.RunPython(
+            move_priority_to_order,
+            reverse_code=migrations.RunPython.noop,
+            elidable=True,
+        ),
+        migrations.RemoveField(model_name="producttype", name="priority"),
+    ]