unable to trigger flask restless postprocessor
<p>I'm using <code>Flask-Restless</code> 0.17.0 and having trouble getting a <a href="http://flask-restless.readthedocs.org/en/latest/customizing.html#request-preprocessors-and-postprocessors" rel="nofollow">preprocessor or postprocessor function</a> to fire. For reference, I have an SQLAlchemy model that look like: </p>

<pre><code>class Transaction(Base):
    id = Column(Integer, primary_key=True)
    name = Column(Unicode)
    description = Column(Unicode)
</code></pre>

<p>I'm able to register the API endpoint without any trouble, but I can not get this <code>hello_world</code> postprocessor to print "hello world" for the life of me: </p>

<pre><code>def hello_world(**kwargs):
    print 'hello world'

manager.create_api(
    fraud.data.Transaction
    methods=['GET', 'POST', 'DELETE'],
    postprocessors={'POST_RESOURCE': [hello_world]},
)
</code></pre>

<p>Am I missing something? Any pointers, hints, etc would be greatly appreciated!</p>