异常处理

gistfile1.rb

class Api < Grape::API
  class << self
    def log_exception(exception)
      trace = exception.backtrace

      message = "\n#{exception.class} (#{exception.message}):\n"
      message << exception.annoted_source_code.to_s if exception.respond_to?(:annoted_source_code)
      message << "  " << trace.join("\n  ")

      Rails.logger.error(message)
    end
  end

  rescue_from ActiveRecord::RecordNotFound do |exception|
    Api.log_exception(exception)

    rack_response(MultiJson.dump({ message: '未找到', status: 404, success: false }), 404 )
  end

  rescue_from :all do |exception|
    Api.log_exception(exception)

    rack_response(MultiJson.dump({ message: "未知错误", status: 500, success: false  }), 200)

    raise exception
  end
end