fsddsfdsfds.js

// task model
'use strict';

module.exports = (sequelize, DataTypes) => {
  const Task = sequelize.define('Task', {
    name: DataTypes.STRING
  });

  Task.associations = function (models) {
    Task.belongsTo(models.User, {
      as: 'owner'
    });
  };

  return Task;
};

// user model
'use strict';

module.exports = (sequelize, DataTypes) => {
  const User = sequelize.define('User', {
    first_name: DataTypes.STRING,
    last_name: DataTypes.STRING,
    email: DataTypes.STRING
  }, {
    underscored: true
  });

  User.associations = function (models) {
    User.hasMany(models.Task, {
      as: 'tasks'
    });
  };

  return User;
};

// users route
const models = require('./../models');
const express = require('express');
const router = express.Router();

router.get('', function (req, res) {
  models.User.findAll({
    include: [
      {
        model: models.Task,
        as: 'tasks'
      }
    ]
  }).then(function (users) {
    res.send(users);
  });
});

module.exports = router;