title: Flask-Restless API Endpoints only work sometimes
body: <p>I am building a Webservices API using Flask-Restless, Flask-SQLAlchemy and SQLite3. I have a class called Place, which also is a table containing different places around my city. From what I understand I should be able to post new data at endpoints like so:</p>
  
  <pre><code>http://localhost:5000/webservices/api/place
  </code></pre>
  
  <p>I also should be able to see a json response of everything in that table when I navigate to that url in a browser. This only works part of the time... some times I am able to see the json response, and other times I get a 404 url not found error. I keep refreshing the page and eventually the json response comes back. I still am not able to post the api endpoint without getting a 404 (or a 500 occasionally?).... am I doing something wrong?</p>
  
  <p>I am posting like this:</p>
  
  <pre><code>&gt;&gt;&gt; import json  
  &gt;&gt;&gt; import requests  .
  &gt;&gt;&gt; newplace = {'name': u'Carls Jr.', 'address': '123 Main Street'}
  &gt;&gt;&gt; r = requests.post('http://localhost:5000/webservices/api/place', data=json.dumps(newplace),
  ...                   headers={'content-type': 'application/json'})
  &gt;&gt;&gt; r.status_code, r.headers['content-type']
  (404, 'text/html')
  </code></pre>
  
  <p>Here's my code:</p>
  
  <pre><code>import flask
  import flask.ext.sqlalchemy
  import flask.ext.restless
  
  # Create the Flask application and the Flask-SQLAlchemy object.
  app = flask.Flask(__name__)
  app.config['DEBUG'] = True
  app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////tmp/test.db'
  db = flask.ext.sqlalchemy.SQLAlchemy(app)
  
  #place 
  class Place(db.Model):
      id = db.Column(db.Integer, primary_key=True)
      name = db.Column(db.Unicode, unique=True)
      address = db.Column(db.Unicode)
  
  
  # Create the database tables.
  db.create_all()
  
  # Create the Flask-Restless API manager.
  manager = flask.ext.restless.APIManager(app, flask_sqlalchemy_db=db)
  
  manager.create_api(Place, methods=['GET', 'POST', 'DELETE'])
  
  # start the flask loop
  if __name__ == '__main__':
      app.run()
  </code></pre>