Fix subscribes

apps/notification/migrations/0011_auto_20200124_1351.py

@@ -0,0 +1,39 @@
+# Generated by Django 2.2.7 on 2020-01-24 13:51
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('notification', '0010_auto_20191231_0135'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='subscribe',
+            name='old_subscriber_id',
+            field=models.PositiveIntegerField(null=True, verbose_name='Old subscriber id'),
+        ),
+        migrations.AddField(
+            model_name='subscribe',
+            name='old_subscription_type_id',
+            field=models.PositiveIntegerField(null=True, verbose_name='Old subscription type id'),
+        ),
+        migrations.AlterField(
+            model_name='subscribe',
+            name='subscribe_date',
+            field=models.DateTimeField(blank=True, default=None, null=True, verbose_name='Last subscribe date'),
+        ),
+        migrations.AlterField(
+            model_name='subscribe',
+            name='subscriber',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='notification.Subscriber'),
+        ),
+        migrations.AlterField(
+            model_name='subscribe',
+            name='subscription_type',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='notification.SubscriptionType'),
+        ),
+    ]

apps/notification/models.py

@@ -2,6 +2,7 @@
 
 from django.conf import settings
 from django.db import models
+from django.db.models import F
 from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy as _
 
@@ -10,6 +11,7 @@ from location.models import Country
 from notification.tasks import send_unsubscribe_email
 from utils.methods import generate_string_code
 from utils.models import ProjectBaseMixin, TJSONField, TranslatedFieldsMixin
+from notification.tasks import send_unsubscribe_email
 
 
 class SubscriptionType(ProjectBaseMixin, TranslatedFieldsMixin):
@@ -133,7 +135,12 @@ class Subscriber(ProjectBaseMixin):
 
     def unsubscribe(self, query: dict):
         """Unsubscribe user."""
-        self.subscribe_set.update(unsubscribe_date=now())
+
+        self.subscribe_set.update(
+            unsunbscribe_date=now(),
+            old_subscriber_id=F('subscriber_id'),
+            old_subscription_type_id=F('subscription_type_id')
+        ).update(subscriber_id=None, subscription_type_id=None)
 
         if settings.USE_CELERY:
             send_unsubscribe_email.delay(self.email)
@@ -166,15 +173,20 @@ class SubscribeQuerySet(models.QuerySet):
         """Fetches active subscriptions."""
         return self.exclude(unsubscribe_date__isnull=not switcher)
 
+    def subscription_history(self, subscriber_id: int):
+        return self.filter(old_subscriber_id=subscriber_id)
+
 
 class Subscribe(ProjectBaseMixin):
     """Subscribe model."""
-
-    subscribe_date = models.DateTimeField(_('Last subscribe date'), blank=True, null=True, default=now)
+    subscribe_date = models.DateTimeField(_('Last subscribe date'), default=now(), blank=True, null=True)
     unsubscribe_date = models.DateTimeField(_('Last unsubscribe date'), blank=True, null=True, default=None)
 
-    subscriber = models.ForeignKey(Subscriber, on_delete=models.CASCADE)
-    subscription_type = models.ForeignKey(SubscriptionType, on_delete=models.CASCADE)
+    subscriber = models.ForeignKey(Subscriber, on_delete=models.CASCADE, null=True)
+    subscription_type = models.ForeignKey(SubscriptionType, on_delete=models.CASCADE, null=True)
+
+    old_subscriber_id = models.PositiveIntegerField(_("Old subscriber id"), null=True)
+    old_subscription_type_id = models.PositiveIntegerField(_("Old subscription type id"), null=True)
 
     objects = SubscribeQuerySet.as_manager()
 
@@ -183,3 +195,12 @@ class Subscribe(ProjectBaseMixin):
 
         verbose_name = _('Subscribe')
         verbose_name_plural = _('Subscribes')
+
+    def save(self, *args, **kwargs):
+        if self.subscriber is not None:
+            self.old_subscriber_id = self.subscriber.pk
+
+        if self.subscription_type is not None:
+            self.old_subscription_type_id = self.subscription_type.pk
+
+        return super().save(*args, **kwargs)

apps/notification/serializers/common.py

@@ -166,3 +166,14 @@ class SubscribeSerializer(serializers.ModelSerializer):
             'subscription_types',
             'link_to_unsubscribe',
         )
+
+
+class UnsubscribeSerializer(serializers.ModelSerializer):
+    email = serializers.EmailField(read_only=True, required=False, source='send_to')
+    subscription_types = SubscriptionTypeSerializer(source='active_subscriptions', read_only=True, many=True)
+
+    class Meta:
+        """Meta class."""
+
+        model = models.Subscriber
+        fields = SubscribeSerializer.Meta.fields

apps/notification/tasks.py

@@ -3,7 +3,6 @@ from datetime import datetime
 from celery import shared_task
 from django.conf import settings
 from django.core.mail import send_mail
-from django.utils.translation import gettext_lazy as _
 from django.template.loader import get_template, render_to_string
 
 from main.models import SiteSettings

apps/notification/views/common.py

@@ -70,7 +70,7 @@ class UnsubscribeView(generics.UpdateAPIView):
     queryset = models.Subscriber.objects.all()
     serializer_class = serializers.SubscribeSerializer
 
-    def patch(self, request, *args, **kw):
+    def put(self, request, *args, **kw):
         obj = self.get_object()
         obj.unsubscribe(request.query_params)
         serializer = self.get_serializer(instance=obj)