text: var DataSource = require('loopback-datasource-juggler').DataSource;
  
  var config = require('rc')('loopback', {dev: {mongodb: {}}}).dev.mongodb;
  
  var ds = new DataSource(require('../'), config);
  
  var Post = ds.define('Post', {
    title: { type: String, length: 255, index: true },
    content: { type: String }
  });
  
  var post = new Post({id: '123', title: 'a', content: 'AAA'});
  console.log(post);