feat: add basic subscriptions

src/fellchensammlung/models.py

@@ -552,3 +552,9 @@ class BaseNotification(models.Model):
 
 class CommentNotification(BaseNotification):
     comment = models.ForeignKey(Comment, on_delete=models.CASCADE, verbose_name=_('Antwort'))
+
+
+class Subscriptions(models.Model):
+    user = models.ForeignKey(User, on_delete=models.CASCADE, verbose_name=_('Nutzer*in'))
+    adoption_notice = models.ForeignKey(AdoptionNotice, on_delete=models.CASCADE, verbose_name=_('AdoptionNotice'))
+    created_at = models.DateTimeField(auto_now_add=True)

src/fellchensammlung/views.py

@@ -12,7 +12,7 @@ from notfellchen import settings
 
 from fellchensammlung import logger
 from .models import AdoptionNotice, Text, Animal, Rule, Image, Report, ModerationAction, \
-    User, Location, AdoptionNoticeStatus
+    User, Location, AdoptionNoticeStatus, Subscriptions
 from .forms import AdoptionNoticeForm, AdoptionNoticeFormWithDateWidget, ImageForm, ReportAdoptionNoticeForm, \
     CommentForm, ReportCommentForm, AnimalForm, \
     AdoptionNoticeSearchForm, AnimalFormWithDateWidget
@@ -61,6 +61,10 @@ def adoption_notice_detail(request, adoption_notice_id):
                 comment_instance.adoption_notice_id = adoption_notice_id
                 comment_instance.user = request.user.member
                 comment_instance.save()
+
+                # Auto-subscribe user to adoption notice
+                subscription = Subscriptions(adoption_notice=adoption_notice, user=request.user)
+                subscription.save()
         else:
             raise PermissionDenied
     else: