Flask-Restless unable to construct query
<p>I recently using Flask-Restless to create API.</p>

<p>When I tried to query the API, I got "unable to construct query" error message on the web browser (firefox). Here is the query:</p>

<pre><code>http://localhost:5000/api/product?q={ "filters" : [ { "name": "name", "op": "eq", "value": "mercy" } ] }
</code></pre>

<p>and here is the Product class:</p>

<pre><code>class Product(db.Model):
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(80))
    details = db.Column(MutableDict.as_mutable(HSTORE))

    def __init__(self, name, details):
        self.name = name
        self.details = details

    def __repr__(self):
        return self.name
</code></pre>

<p>this error only occur when I used query. accessing only <code>http://localhost:5000/api/product</code> worked fine.</p>

<p>What is the problem?</p>

<p>I've tried to ommit the HSTORE field, but still error. So, I assume HSTORE is not the suspect.</p>
