Fixtures are data files that can be used to seed your database, either during development or within tests. In general Mirage recommends using factories over fixtures, though there are times where fixtures are suitable.

To add data to a database table countries, for instance, first create the file mirage/fixtures/countries.js:

// mirage/fixtures/countries.js
export default [
  {id: 1, name: 'United States'},
  {id: 2, name: 'Canada'},
  {id: 3, name: 'Mexido'},

Fixture filenames are always plural, and export arrays of POJOs.

To load this fixture file into our database during development, we can use the loadFixtures API in our scenarios/default.js file:

// mirage/scenarios/default.js
export default function(server) {

We can also call server.loadFixtures() to have all defined fixture files loaded into the database.

Similarly, we can call loadFixtures from within a test to load this data into our database:

test('I can see the countries', function() {


  andThen(function() {
    equal( find('select.countries option').length, 100 );

See the server.loadFixtures docs for more information.