discourse-custom-wizard/serializers/custom_wizard/submission_serializer.rb

# frozen_string_literal: true
class CustomWizard::SubmissionSerializer < ApplicationSerializer
  attributes :id,
             :user,
             :fields,
             :submitted_at

  has_one :user, serializer: ::BasicUserSerializer, embed: :objects

  def include_user?
    object.user.present?
  end

  def fields
    @fields ||= begin
      result = {}

      object.wizard.template['steps'].each do |step|
        step['fields'].each do |field|
          if value = object.fields[field['id']]
            result[field['id']] = {
              value: value,
              type: field['type'],
              label: field['label']
            }
          end
        end
      end

      result
    end
  end
end