Flask signal example

gistfile1.txt

from flask import Flask
from flaskext.sqlalchemy import SQLAlchemy, models_comitted

app = Flask(__name__)
db = SQLAlchemy(app)

class Post(db.Model):
     id = db.Column('post_id', db.Integer, primary_key=True)
     title = db.Column(db.String(200))
     text = db.Column(db.String)

     def __init__(self, title, text):
         self.title = title
         self.text = text

def update_post_search_entry(post, operation):
     if operation == 'insert':
         searchindex.insert(post)
     elif operation == 'update':
         searchindex.update(post)
     elif operation == 'delete':
         searchindex.delete(post)

def on_models_committed(sender, changes):
     for model, change in changes:
         if isinstance(model, Post):
             update_post_search_entry(model, change)

models_committed.connect(on_models_committed, sender=app)