Add get_absolute_url() method for todo items

todo/models.py

@@ -1,6 +1,7 @@
 from django.db import models
 from django.contrib.auth.models import User, Group
 from django.template.defaultfilters import slugify
+from django.core.urlresolvers import reverse
 
 import datetime
 
@@ -56,6 +57,10 @@ class Item(models.Model):
     def __unicode__(self):
         return self.title
 
+    def get_absolute_url(self):
+        return reverse('todo-task_detail',
+            kwargs={'task_id': self.id,})
+
     # Auto-set the item creation / completed date
     def save(self):
         # If Item is being marked complete, set the completed_date