title: How to auto populate nested associations of sails blueprint for url /model/<id>/association
body: <p>I have two models Users and Chat with many to many association.</p>
  
  <p>User.js</p>
  
  <pre><code>module.exports = {
  
    attributes: {
      name: {
           type       : 'string'
          ,required   : true
      },
  
      email:{
           type   : 'string'
          ,email  : true
          ,required: true
          ,unique : true
      },
      enpassword : {
          type: 'string'
      },
  
      online : {
          type: 'boolean',
          defaultsTo: false
      },
  
      socketid: {
          type: 'string'
      },
      chats : {
        collection: 'chat',
        via: 'users',
        dominant: true
      }
  
  };
  </code></pre>
  
  <p>Chat.js</p>
  
  <pre><code>module.exports = {
    attributes: {
      messages : {
        collection: 'message',
        via       : 'chat',
        dominant  : true
      },
      users : {
        collection: 'user',
        via       : 'chats'
      },
    }
  };
  </code></pre>
  
  <p>When I call sails blueprint /user/1/chats I am getting list of chats but users association of each chat is not populated.</p>
  
  <p>How can I achieve this from Sails queries ?</p>