How to access #current_user variable defined in ApplicationController inside of Serializer - ruby-on-rails

Question

I'm using Active Model Serializers.
I am trying to access #current_user which is defined inside ApplicationController like this:
class ApplicationController < ActionController::API
before_action :authenticate_request
private
def authenticate_request
auth_header = request.headers['Authorization']
regex = /^Bearer /
auth_header = auth_header.gsub(regex, '') if auth_header
begin
#current_user = AccessToken.get_user_from_token(auth_header)
rescue JWT::ExpiredSignature
return render json: {error: "Token expired"}, status: 401
end
render json: { error: 'Not Authorized' }, status: 401 unless #current_user
end
end
I can use #current_user anywhere I want except inside my ProjectSerializer, which looks like this:
class V1::ProjectSerializer < ActiveModel::Serializer
attributes(:id, :name, :key, :type, :category, :created_at)
attribute :is_favorited
belongs_to :user, key: :lead
def is_favorited
if object.favorited_by.where(user_id: #current_user.id).present?
return true
else
return false
end
end
end
ProjectSerializer is located in my app/ project tree structure:
app/
serializers/
v1/
project_serializer.rb
I get an error trying to access #current_user:
NoMethodError in V1::UsersController#get_current_user
undefined method `id' for nil:NilClass
This happens when I'm calling the function from UserController, which then goes to UserSerializer and then that serializer has has_many :projects field which calls ProjectSerializer.

Answer 1

You can access the variables using instance_options. I believe you can access #current_user in projects controller. For example :
def projects
#projects = Project.all
render_json: #projects, serializer: ProjectSerializer, current_user: #current_user
end
Inside the serializer you can access the current_user like wise:
def is_favorited
if object.favorited_by.where(user_id: #instance_options[:current_user].id).present?
return true
else
return false
end
end