validation_error_serializer.rb

class ValidationErrorSerializer
  def initialize record, field, details, message
    @record = record
    @field = field
    @details = details
    @message = message
  end

  def serialize
    {
      resource: resource,
      field: field,
      code: code,
      message: message
    }
  end

  private
  attr_reader :record, :message

  def resource
    I18n.t underscored_resource_name,
      scope: [:errors, :resources],
      default: underscored_resource_name
  end

  def field
    I18n.t @field,
      scope: [:errors, :fields, underscored_resource_name],
      default: @field.to_s
  end

  def code
    I18n.t @details[:error],
      scope: [:errors, :code],
      default: @details[:error].to_s
  end

  def underscored_resource_name
    record.class.to_s.gsub("::", "").underscore
  end
end