Resolve "RSS feed for upcoming events"

Closes #11 (closed)

aleksis/apps/paweljong/models.py

 from datetime import datetime
 
 from django.db import models
+from django.urls import reverse
+from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _
 
 from ckeditor.fields import RichTextField
@@ -67,6 +69,9 @@ class Event(ExtensibleModel):
             return self.date_registration >= now
         return self.date_event > now
 
+    def get_absolute_url(self):
+        return reverse("event_by_name", kwargs={"slug": self.linked_group.short_name})
+
     @property
     def booked_percentage(self):
         return self.linked_group.members.count() / self.max_participants * 100
@@ -79,6 +84,10 @@ class Event(ExtensibleModel):
     def owners_persons(self):
         return self.linked_group.owners.all()
 
+    @classmethod
+    def upcoming_published_events(cls):
+        return Event.objects.filter(published=True, date_event__gte=now())
+
 
 class Voucher(ExtensibleModel):
     class Meta: