discourse-custom-wizard/extensions/custom_field/serializer.rb

module CustomWizardCustomFieldSerializer
  def attributes(*args)
    hash = super

    if cw_fields_enabled?
      @cw_klass = get_cw_class

      if cw_fields.any?
        cw_fields.each do |field|
          if @cw_klass == "topic_view"
            hash[field[:name].to_sym] = object.topic.custom_fields["#{field[:name]}"]
          else
            hash[field[:name].to_sym] = object.custom_fields["#{field[:name]}"]
          end
        end
      end
    end

    hash
  end

  private

  def cw_fields_enabled?
    SiteSetting.custom_wizard_enabled && CustomWizard::CustomField.enabled?
  end

  def cw_fields
    CustomWizard::CustomField.list_by(:serializers, @cw_klass)
  end

  def get_cw_class
    self.class.ancestors.map do |klass|
      klass.to_s.underscore.gsub("_serializer", "")
    end.select do |klass|
      CustomWizard::CustomField.serializers.include?(klass)
    end.first
  end
end