Sequelize.js' association are not rendered on the page

Question

I have two models.

var self = {
    User: sequelize.define('user', {
        id: {type: Sequelize.INTEGER,primaryKey: true,autoIncrement: true},
        name: {type: Sequelize.STRING,allowNull: false}
    }),

    Role: sequelize.define('role', {
        id: {type: Sequelize.INTEGER,primaryKey: true,autoIncrement: true},      
        name: {type: Sequelize.STRING,allowNull: false} 
   })
}

I have also specify association between them.

self.User.belongsTo(self.Role);

Part of controller user.js:

list: function(req, res){
   models.User.findAll({offset: offset, limit: limit}).success(function (users) {
            if (req.params.format == 'html') {
                res.render('admin/user/list.html', {
                    title: 'Users',
                    layout: layout,
                    users: users
                });
            }   else if (req.params.format == 'json') {
                res.json(users);
            }
   }

In view list.html:

<% users.forEach(function(user){ %>
    <tr>
        <td><%= user.id %></td>
        <td><a href="/admin/user/<%= user.id %>/show.html"><%= user.name %></a></td>
        <td><%= user.getRole().name %></td>
    </tr>
<% } %>

If we call /list.html We obtained undefined role on page for each user.

And if we call /list.json we obtain:

[{"id":1,"name":"user1", "role_id":1},
[{"id":2,"name":"user2", "role_id":1},
[{"id":3,"name":"user3", "role_id":2},
...

How do I get the role for each user in list.html and in json response? Or maybe there is some better way?

Thanks.

Answer 1

The reason for not getting the associated role is the fact, that getting the role of that user is handled asynchronously. This means 1.) that you need to use user.getRole().success(function(role){}) and 2.) that you need to read the role in the controller because EJS isn't capable of handling asynchronicity. Hope that helps :)

Answer 2

You need to call

models.User.findAll({offset: offset, limit: limit, include: [models.Role]})

see http://sequelizejs.com/documentation#models-eager-loading for more details