Add new admins, rework relation between orders and memberships, MembershipType can contain many Products, Memberships can be activated and revoked

src/accounting/admin.py

@@ -56,3 +56,18 @@ class PaymentAdmin(admin.ModelAdmin):
     def order_id(self, instance: models.Payment) -> int:
         """Return the ID of the order."""
         return instance.order.id
+
+
+@admin.register(models.Product)
+class ProductAdmin(admin.ModelAdmin):  # noqa: D101
+    list_display = ("name", "price", "vat")
+
+
+class TransactionInline(admin.TabularInline):  # noqa: D101
+    model = models.Transaction
+
+
+@admin.register(models.Account)
+class AccountAdmin(admin.ModelAdmin):  # noqa: D101
+    list_display = ("owner", "balance")
+    inlines = (TransactionInline,)

src/accounting/apps.py

@@ -7,3 +7,7 @@ class AccountingConfig(AppConfig):
     """Accounting app config."""
 
     name = "accounting"
+
+    def ready(self) -> None:
+        """Implicitly connect a signal handlers decorated with @receiver."""
+        from . import signals  # noqa: F401

src/accounting/migrations/0006_alter_account_owner_alter_order_user.py

@@ -8,7 +8,7 @@ class Migration(migrations.Migration):
 
     dependencies = [
         ('accounting', '0005_remove_order_price_remove_order_price_currency_and_more'),
-        ('membership', '0007_membershiptype_current_membershiptype_product'),
+        ('membership', '0006_waitinglistentry_alter_membership_options'),
     ]
 
     operations = [

src/accounting/models.py

@@ -95,6 +95,11 @@ class Order(CreatedModifiedAbstract):
         """Return the total VAT of the order."""
         return sum(order_product.vat for order_product in self.order_products)
 
+    @property
+    def total_with_vat(self) -> Money:
+        """Return the TOTAL amount WITH VAT."""
+        return self.total + self.total_vat
+
     @property
     def display_id(self) -> str:
         """Return an id for the order."""

src/accounting/signals.py

@@ -0,0 +1,21 @@
+"""Loaded with the AppConfig.ready() method."""
+
+from django.conf import settings
+from django.core.mail import send_mail
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+
+from . import models
+
+
+# method for updating
+@receiver(post_save, sender=models.Payment)
+def check_total_amount(sender: models.Payment, instance: models.Payment, **kwargs: dict) -> None:  # noqa: ARG001
+    """Check that we receive Payments with the correct amount."""
+    if instance.amount != instance.order.total_with_vat:
+        send_mail(
+            "Payment received: wrong amount",
+            f"Please check payment ID {instance.pk}",
+            settings.DEFAULT_FROM_EMAIL,
+            settings.ADMINS,
+        )

src/membership/migrations/0007_membership_activated_membership_activated_on_and_more.py

@@ -0,0 +1,55 @@
+# Generated by Django 5.1b1 on 2024-07-25 22:47
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('accounting', '0007_rename_user_order_member'),
+        ('membership', '0006_waitinglistentry_alter_membership_options'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='membership',
+            name='activated',
+            field=models.BooleanField(default=False, help_text='Membership was activated.', verbose_name='activated'),
+        ),
+        migrations.AddField(
+            model_name='membership',
+            name='activated_on',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='membership',
+            name='order',
+            field=models.ForeignKey(blank=True, help_text='The order filled in for paying this membership.', null=True, on_delete=django.db.models.deletion.PROTECT, to='accounting.order', verbose_name='order'),
+        ),
+        migrations.AddField(
+            model_name='membership',
+            name='revoked',
+            field=models.BooleanField(default=False, help_text='Membership has explicitly been revoked. Revoking a membership is not associated with regular expiration of the membership period.', verbose_name='revoked'),
+        ),
+        migrations.AddField(
+            model_name='membership',
+            name='revoked_on',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='membership',
+            name='revoked_reason',
+            field=models.TextField(blank=True),
+        ),
+        migrations.AddField(
+            model_name='membershiptype',
+            name='active',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.AddField(
+            model_name='membershiptype',
+            name='products',
+            field=models.ManyToManyField(to='accounting.product'),
+        ),
+    ]

src/membership/migrations/0007_membershiptype_current_membershiptype_product.py

@@ -1,26 +0,0 @@
-# Generated by Django 5.0.7 on 2024-07-21 14:12
-
-import django.db.models.deletion
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('accounting', '0004_paymenttype_product_payment_external_transaction_id_and_more'),
-        ('membership', '0006_waitinglistentry_alter_membership_options'),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name='membershiptype',
-            name='current',
-            field=models.BooleanField(default=False),
-        ),
-        migrations.AddField(
-            model_name='membershiptype',
-            name='product',
-            field=models.ForeignKey(default=1, on_delete=django.db.models.deletion.PROTECT, to='accounting.product'),
-            preserve_default=False,
-        ),
-    ]

src/membership/models.py

@@ -84,7 +84,7 @@ class Membership(CreatedModifiedAbstract):
 
         def _current(self) -> Self:
             """Filter memberships for the current period."""
-            return self.filter(period__period__contains=timezone.now())
+            return self.filter(activated=True, revoked=False, period__period__contains=timezone.now())
 
         def current(self) -> "Membership | None":
             """Get the current membership."""
@@ -116,6 +116,31 @@ class Membership(CreatedModifiedAbstract):
         on_delete=models.PROTECT,
     )
 
+    order = models.ForeignKey(
+        "accounting.Order",
+        null=True,
+        blank=True,
+        verbose_name=_("order"),
+        help_text=_("The order filled in for paying this membership."),
+        on_delete=models.PROTECT,
+    )
+
+    activated = models.BooleanField(
+        default=False, verbose_name=_("activated"), help_text=_("Membership was activated.")
+    )
+    activated_on = models.DateTimeField(null=True, blank=True)
+
+    revoked = models.BooleanField(
+        default=False,
+        verbose_name=_("revoked"),
+        help_text=_(
+            "Membership has explicitly been revoked. Revoking a membership is not associated with regular expiration "
+            "of the membership period."
+        ),
+    )
+    revoked_reason = models.TextField(blank=True)
+    revoked_on = models.DateTimeField(null=True, blank=True)
+
     class Meta:
         verbose_name = _("membership")
         verbose_name_plural = _("memberships")
@@ -133,9 +158,9 @@ class MembershipType(CreatedModifiedAbstract):
 
     name = models.CharField(verbose_name=_("name"), max_length=64)
 
-    product = models.ForeignKey("accounting.Product", on_delete=models.PROTECT)
+    products = models.ManyToManyField("accounting.Product")
 
-    current = models.BooleanField(default=False)
+    active = models.BooleanField(default=True)
 
     class Meta:
         verbose_name = _("membership type")