ActiveModel::Serializer belongs_to attribute is not being displayed in json response

Question

I'm not quite sure why this isn't working but I have the following serializer:

class ExternalAccountSerializer < ActiveModel::Serializer
  attributes :id, :account_name, :type

  belongs_to :user, serializer: UserSerializer
end

The API is returning the following:

{
    "external_account":{
        "id":3,"account_name":"Company Inc.","type":"External service"
    }
}

The external account is being returned but the user is not. Any ideas why that is? How can I ensure this is displayed?

why is it like this, that `belongs_to` is not using serializer — Arjun Singh, Jul 18 '17 at 07:46

fabriciofreitag · Answer 1 · 2016-02-28T02:02:05.733

3

I believe you must include :user on your attributes:

 attributes :id, :account_name, :type, :user

and then:

def user
  UserSerializer.new(object.user, root: false)
end

edited Feb 28 '16 at 02:02

answered Feb 28 '16 at 01:43

fabriciofreitag

2,843
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26

Only problem is that it then doesn't use the custom serializer – Nick ONeill Feb 28 '16 at 01:58
can you test my edition? I'm doing a similar thing with POROs, not sure if it works in your case @NickONeill – fabriciofreitag Feb 28 '16 at 02:02

score 0 · Answer 2 · answered Apr 18 '18 at 20:10

0

Here is my solution: I had to include the user in the controller.

posts_controller.rb

  ...
  render json: post,
      include: 'user', # include user for custom serializer to work
   serializer: Api::V1::Post::PostSerializer,
       status: :created

answered Apr 18 '18 at 20:10

Pascal

1,158
17
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docs: https://github.com/rails-api/active_model_serializers/blob/v0.10.6/docs/general/adapters.md#include-option – Pascal Apr 18 '18 at 20:12

ActiveModel::Serializer belongs_to attribute is not being displayed in json response

2 Answers2