Support afterAttrs option similar to afterBuild and afterCreate

[chetanism]

Support afterAttrs option similar to afterBuild and afterCreate

[simonexmachina]

I think the reason the first example throws is that you're not returning the attrs in the initializer.

The second example is the right approach. The following works:

const STEP_FREQ = 1
factory.define('packet', Object, {
  time: factory.seq('Packet.time', i => Math.floor( Date.now() / 1000 ) + ( STEP_FREQ * i )),
}, {
  afterBuild: model => {
    model.time_to = model.time
    return model
  }
})
factory.build('packet').then(console.log) // => { time: 1507078473, time_to: 1507078473 }

[4Z4T4R]

I have plenty of test cases that dont require be to create or build or persist my models... in fact I don't have models at all. I just need to pump out sequential JSON objects with attribute duplicates. I tried the afterBuild approach but this doesn't get me what I need.

Why is this closed?
Is there a way to duplicate attributes so the values within a JSON object can be replicated?

[4Z4T4R]

For example ... I am trying to replicate the time field in the time_to field. For whatever irrelevant reason, the two have to have the same exact values.... I am trying to accomplish this by trying the buildOptions function which results in an unhandled promise rejection...

factory.define('packet', Object, buildOptions => {
  let attrs = {
    "curr_hour" : 0,
    "device_id" : "ULP00037",
    "last_hour" : () => { return 3600 / STEP_FREQ * STEP_INTERVAL; },
    "latitude" : factory.chance('latitude', { 'fixed': 13 }),
    "longitude" : factory.chance('longitude', { 'fixed': 13 }),
    "time": factory.seq( 'Packet.time',
      (i) =>
      {
        let g = new Date();
        return Math.floor( g.getTime()/1000 ) + ( STEP_FREQ * i );
      }
    ),
    "step_count": factory.seq( 'Packet.step_count',
      (i) =>
      {
        return i * STEP_INTERVAL;
      }
    ),
    "packet_id" : factory.seq( 'Packet.packet_id',
      ( i ) =>
      {
        return i;
      }
    ),
    "prev_hour" : () => { return 3600 / STEP_FREQ * STEP_INTERVAL; },
    "proximity" : 0
  };
  attrs['time_to'] = attrs['time'];
});

let packet = factory.attrs('packet', {}, {})

...and the afterBuild which results in a missing attribute inside the JSON...

factory.define('packet', Object, {
 	"curr_hour" : 0,
	"device_id" : "ULP00037",
	"last_hour" : () => { return 3600 / STEP_FREQ * STEP_INTERVAL; },
	"latitude" : factory.chance('latitude', { 'fixed': 13 }),
	"longitude" : factory.chance('longitude', { 'fixed': 13 }),
  "time": factory.seq( 'Packet.time',
    (i) =>
    {
      let g = new Date();
      return Math.floor( g.getTime()/1000 ) + ( STEP_FREQ * i );
    }
  ),
  "step_count": factory.seq( 'Packet.step_count',
    (i) =>
    {
      return i * STEP_INTERVAL;
    }
  ),
	"packet_id" : factory.seq( 'Packet.packet_id',
    ( i ) =>
    {
      return i;
    }
  ),
	"prev_hour" : () => { return 3600 / STEP_FREQ * STEP_INTERVAL; },
	"proximity" : 0
}, {
  afterBuild: model => {
    model.time_to = model.time;
    return model;
  }
});
let packet = factory.attrs('packet')

You cover so many use cases in your docs... and issues. But this one?