moved everything to a new module called backend

backend/models/post_model.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+"""
+Example post model and related models
+"""
+
+from backend import db
+
+
+class Post(db.Model):
+    """
+    A post example class
+    """
+    id = db.Column(db.Integer, primary_key=True)
+    body = db.Column(db.String(140))
+    timestamp = db.Column(db.DateTime)
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
+
+    def __repr__(self):
+        return '<Post %r>' % self.body