old-holivud2/app/controllers/api/api_controller.rb

class Api::ApiController < ActionController::Base
  skip_before_action :verify_authenticity_token
  include Knock::Authenticable
  include Pundit

  rescue_from Exception, :with => :return_error
  before_action :authenticate_user 
  before_action do
    Current.user = current_user if current_user.present?
  end

  def pundit_user
    UserContext.new(Current.user, Current.account)
  end

  # Catch exception and return JSON-formatted error
  def return_error(exception)
    raise exception if Rails.env.test? 

    Raven.capture_exception(exception)

    logger.error "==Handled======"
    logger.error exception.message
    logger.error exception.backtrace.join("\n")
    logger.error "==Handled=======" 
    case exception.class
    when ActiveRecord::RecordNotFound
      @status = 404
      @message = 'Record not found'
    when ActiveRecord::RecordInvalid
      @status = 422
      @message = 'Record invalid'
    when ArgumentError
      @status = 400
      @message = 'Argument Error'
    else
      @status = 500
      @message = 'Internal Error'
    end

    # for some reason render json_errors is not working
    # simulating JSON API support 
    render json: { 
      errors: [{
        status: @status.to_s,
        title: @message
      }]
    }
  end
end