Modified models.py, adding get_absolute_url function in ForumPost model.

widget_OhMyBash/forum/models.py

 from django.db import models
+from django.urls import reverse
 
 
 class ForumPost(models.Model):
@@ -19,6 +20,12 @@ class ForumPost(models.Model):
             self.body
         )
 
+    def get_absolute_url(self):
+        return reverse(
+            'forum:forumpost-details',
+            kwargs={'pk': self.pk}
+        )
+
 
 class Reply(models.Model):
     body = models.TextField()