function* (){
    let ctx            = this;
    let message        = 'This is an example';
    let commentCreated = yield ctx._waterline.collections.comments.create({message: message});
    // You can yield to the CRUD waterline functions because they are written as promises.
    console.log(commentCreated);
  }

  function* () {
    let waterline      = yield Waterline.init(injection);
    let message        = 'This is an example';
    let commentCreated = yield waterline.collections.comments.create({message: message});
  }

  let connections = {
    couch: {
      adapter: "couch",
      host: '127.0.0.1',
      port: '5984',
      username: '',
      password: ''
    },
    mongo: {
      adapter: "mongo",
      host: 'localhost',
      port: '27017',
      user: '',
      password: '',
      database: 'waterline'
    },
    cassandra: {
      adapter: "cassandra",
      host: '',
      password: '',
      contactPoints: ['127.0.0.1'],
      keyspace: 'dev'
    }
  };

  let adapters = {
    couch:     require('sails-couchdb-orm'),
    mongo:     require('sails-mongo'),
    cassandra: require('sails-cassandra')
  };

  let models = {
      "comments": {
        "model": true,
        "adp": "couch",
        "connection": "couch",
        "properties": {
          "archived": {
              "type": "boolean",
              "defaultValue": false
          },
          "message": {
              "type": "string"
          }
        }
      },
      "history": {
        "model" : true,
        "adp": "mongo",
        "connection": "mongo",
        "properties": {
          "year": {
            "type": "string"
          }
        }
      },
      "tweet": {
        "adp": "cassandra",
        "connection": "cassandra",
        "index": ['tweet_body'],
        "properties": {
          "tweet_body": {
            "type": "string"
          }
        }
      },
      "error": {
        "model": false,
        "properties": {
          "erro": {
            "type": "string"
          }
        }
      }
    };

  let injection               = {};
  injection.methods           = false;
  injection.models            = models;
  injection.adapters          = adapters;
  injection.connections       = connections;

  app.use(waterline(injection));