Factory sequences, traits, lazy

[samselikoff]

The API for sequences is changing to be consistent with upcoming traits, dynamic attrs and associations.

// factories/post.js
import Mirage from 'ember-cli-mirage';

export default Factory.extend({
  title: 'ABC',
  date: new Date(),

  likes: Mirage.seq(i => i),

  approved: Mirage.trait({
    approved_at: new Date(),
  }),

  views: Mirage.lazy(() => {
    return Math.random() * 1000;
  }),

  link: Mirage.lazy('title', 'date', (title, date) => {
    return moment(date).format('MM/DD') + '/' + title;
  }),

});


// tests/acceptance/index-test.js
...
server.create('user');
server.create('user', 'approved');

[jamesarosen]

One pattern we use a lot is a belongs-to relationship that defaults to the first one in the DB:

foo_id: Mirage.lazy((db) => {
  return db.foos.firstOrCreate().id;
})

[mellatone]

Would this support something like

Factory.extend({
  first: function(){
    return faker.name();
  },
  last: function(){
    return faker.name();
  },
  full: function(){
    Return this.first + " " + this.last;
  }
})

(Take it as pseudo code.. I am on a mobile phone!)

[samselikoff]

@jamesarosen interesting... I think an afterCreate block would be a nice place for this?

@mellatone yes, actually this is possible as soon as this PR lands, which is backwards compatible so there's nothing blocking it.

[samselikoff]

[samselikoff]

#269 closes dynamic

[samselikoff]

closing as sequences/lazy are done. Follow #852 to track traits