testing a transaction with natvie sql query and built in ORM methods

transactions in loopback

'use strict';
let uuid = require("uuid");

/**
 * 'use strict';
 let uuid = require("uuid");

 module.exports = function (Todos) {
  Todos.testTransaction = function () {
    Todos.beginTransaction(Todos.Transaction.READ_COMMITTED, function (err, tx) {
      let q1 = `insert into ifdev.todos values('${uuid.v1()}', '10001 note', false)`;
      // Todos.dataSource.connector.execute(q1, function (err, data) {
      Todos.create({
        id: `${uuid.v1()}`,
        text: "some dkfjdlskfjldsf",
        done: false
      }, {transaction: tx}, function (err, data) {
        console.log(`errris i `, err);
        console.log(`data is s`, data);
        tx.rollback(function (res) {
          console.log("rollback res is ", res);
        });
      });
    });
  };
};

 * @param Todos
 */
module.exports = function (Todos) {
  Todos.testTransaction = function () {
    Todos.beginTransaction(Todos.Transaction.READ_COMMITTED, function (err, tx) {
      let q1 = `insert into ifdev.todos values('${uuid.v1()}', '10001 note', false)`;
      /**
       * Sharing transactions between native sql and loopback models.
       * https://groups.google.com/forum/#!topic/loopbackjs/cFbkpZvs9bg
       */
      Todos.dataSource.connector.execute(q1, [], {transaction: tx}, function (err, data) {
        console.log(`errris i `, err);
        console.log(`data is s`, data);
        tx.rollback(function (res) {
          console.log("rollback res is ", res);
        });
      });
    });
  };
};