updated models.py with reverse

widget_OhMyBash/announcements/models.py

 from django.db import models
+from django.urls import reverse
 
 
 class Announcement(models.Model):
@@ -18,6 +19,12 @@ class Announcement(models.Model):
             self.pub_datetime,
             self.body,
         )
+    
+    def get_absolute_url(self):
+        return reverse(
+            'announcements:announcement-details',
+            kwargs={'pk': self.pk},
+        )
 
 
 class Reaction(models.Model):