python manage.py dumpdata app.ModelName --format=yaml  > fixtures/dev/fixture_name.yaml

- fields: {active: true, created_at: !!timestamp '2016-11-14 10:43:40.221602', age: 54,
    updated_at: !!timestamp '2016-11-14 10:43:40.221603', user_type: 1}
  model: app.ModelName
  pk: 1

- fields:
    created_at: 2016-11-14 10:43:40.220895
    age: 54
    user_type: 1
    updated_at: 2016-11-14 10:43:40.220900
  model: app.ModelName
  pk: 1