Commercial ORM - part 2

/* To connect tables in Sequelize your model definitions simply need to specify 
their relationships using the `hasMany` or `belongsTo` functions. For example, we
simply add the following lines to the Restaurant class */

Restaurant.hasMany(Menu, {as: 'menus', foreignKey: 'restaurant_id'})
Menu.belongsTo(Restaurant, {foreignKey: 'restaurant_id'})

/* Sequelize will do all the hard work of creating the new foreign key columns! 
It will also create accessor methods such as `getMenus` and `addMenu` - 
it uses the `as` value to determine the accessor name */

TODO

const {sequelize} = require('./sequelize_index');
const {Restaurant} = require('./Restaurant');
const {Menu} = require('./Menu');

describe('Relationships', () => {
    beforeAll(async () => {
        await sequelize.sync({ force: true });
    })
    
    test('restaurants have menus', async () => {
        // note that Sequelize is build using promises, so we use async await
        const restaurant = await Restaurant.create({name: 'Ronalds', image: 'http://some.image.url'})
        const menu = await Menu.create({title: 'set 1'});
        await restaurant.addMenu(menu);
        const menus = await restaurant.getMenus();
        expect(menus[0].title).toBe('set 1');
    })

})

TODO