ActiveModelSerializer only showing id for association

Question

I'm trying to using an ActiveModelSerializer in my API. Everything seems to work except for the BusinessCategory relationship. It just shows the id for that. I want it to show all the attributes. I'm not sure it's even using the serializer because when I remove the relationship it still shows up.

PerksSerializer

class PerksSerializer < ActiveModel::Serializer
  attributes :id, :status, :scope, :business_name, :business_description, :business_address_street,
    :business_address_state, :business_address_city, :business_address_postal_code,
    :business_website, :latitude, :longitude, :headline, :description, :start_date, :end_date,
    :redemption_instructions, :cashier_instructions, :redemption_button_text, :claim_type,
    :business_manager_approved_by, :created_at

  belongs_to :primary_business_category

  belongs_to :secondary_business_category
end

PerksController

  def index
    data = property.available_perks
    render json: data
  end

BusinessCategorySerializer

class BusinessCategorySerializer < ActiveModel::Serializer
  attributes :name, :description
end

Answer 1

You can do the same code like:

class PerksSerializer < ActiveModel::Serializer
  attributes :id, :status, :scope, :business_name, :business_description, :business_address_street,
    :business_address_state, :business_address_city, :business_address_postal_code,
    :business_website, :latitude, :longitude, :headline, :description, :start_date, :end_date,
    :redemption_instructions, :cashier_instructions, :redemption_button_text, :claim_type,
    :business_manager_approved_by, :created_at, :primary_business_category,:secondary_business_category


   def primary_business_category
     BusinessCategorySerializer.new(object.primary_business_category)
   end

   def secondary_business_category
     BusinessCategorySerializer.new(object.secondary_business_category)
   end
end

or

belongs_to :primary_business_category, serializer: BusinessCategorySerializer

belongs_to :secondary_business_category, serializer: BusinessCategorySerializer

Check if your PerksSerializer is called, if not:

 def index
   data = property.available_perks
   render json: data, each_serializer: PerksSerializer
 end