Price model

counter/migrations/0038_price.py

@@ -0,0 +1,108 @@
+# Generated by Django 5.2.11 on 2026-02-18 13:30
+
+import django.db.models.deletion
+from django.db import migrations, models
+from django.db.migrations.state import StateApps
+
+import counter.fields
+
+
+def migrate_prices(apps: StateApps, schema_editor):
+    Product = apps.get_model("counter", "Product")
+    Price = apps.get_model("counter", "Price")
+    prices = [
+        Price(
+            amount=p.selling_price,
+            product=p,
+            created_at=p.created_at,
+            updated_at=p.updated_at,
+        )
+        for p in Product.objects.all()
+    ]
+    Price.objects.bulk_create(prices)
+    groups = [
+        Price.groups.through(price=price, group=group)
+        for price in Price.objects.select_related("product").prefetch_related(
+            "product__buying_groups"
+        )
+        for group in price.product.buying_groups.all()
+    ]
+    Price.groups.through.objects.bulk_create(groups)
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("core", "0048_alter_user_options"),
+        ("counter", "0037_productformula"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="Price",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                (
+                    "amount",
+                    counter.fields.CurrencyField(
+                        decimal_places=2, max_digits=12, verbose_name="amount"
+                    ),
+                ),
+                (
+                    "is_always_shown",
+                    models.BooleanField(
+                        default=False,
+                        help_text=(
+                            "If this option is enabled, "
+                            "people will see this price and be able to pay it, "
+                            "even if another cheaper price exists. "
+                            "Else it will visible only if it is the cheapest available price."
+                        ),
+                        verbose_name="always show",
+                    ),
+                ),
+                (
+                    "label",
+                    models.CharField(
+                        default="",
+                        help_text="A short label for easier differentiation if a user can see multiple prices.",
+                        max_length=32,
+                        verbose_name="label",
+                        blank=True,
+                    ),
+                ),
+                (
+                    "created_at",
+                    models.DateTimeField(auto_now_add=True, verbose_name="created at"),
+                ),
+                (
+                    "updated_at",
+                    models.DateTimeField(auto_now=True, verbose_name="updated at"),
+                ),
+                (
+                    "groups",
+                    models.ManyToManyField(
+                        related_name="prices", to="core.group", verbose_name="groups"
+                    ),
+                ),
+                (
+                    "product",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="prices",
+                        to="counter.product",
+                        verbose_name="product",
+                    ),
+                ),
+            ],
+            options={"verbose_name": "price"},
+        ),
+        migrations.RunPython(migrate_prices, reverse_code=migrations.RunPython.noop),
+    ]