title: Flask-restless support mysql json column type
body: <p>Does flask-restless support querying across json column types? If so, how are the queries formatted?</p>
  
  <p>I have a database with 3 columns that are of json type.</p>
  
  <p>Example json value in addresses column is:</p>
  
  <p><code>{'country': 'US'}</code></p>
  
  <p>How should the query be formatted? The examples below do not work.</p>
  
  <p><code>{"filters":[{"name":"addresses.country","op":"equal","val":"US"} 
   {"filters":[{"name":"addresses","op":"equal","val":"country:US"}
  </code></p>