new file mode 100644
--- /dev/null
+++ b/examples/tutorial/geddit/model.py
@@ -0,0 +1,31 @@
+from datetime import datetime
+
+
+class Link(object):
+
+    def __init__(self, username, url, title):
+        self.username = username
+        self.url = url
+        self.title = title
+        self.time = datetime.utcnow()
+        self.id = hex(hash(tuple([username, url, title, self.time])))[2:]
+        self.comments = []
+
+    def __repr__(self):
+        return '<%s %r>' % (type(self).__name__, self.title)
+
+    def add_comment(self, username, content):
+        comment = Comment(username, content)
+        self.comments.append(comment)
+        return comment
+
+
+class Comment(object):
+
+    def __init__(self, username, content):
+        self.username = username
+        self.content = content
+        self.time = datetime.utcnow()
+
+    def __repr__(self):
+        return '<%s by %r>' % (type(self).__name__, self.username)