自定义通用 Rails 错误消息

class Application::HttpError < ::Exception
  severity :error
  status  400 # 自定义错误代码

  def initialize(message = nil)
    super(message || "自定义通用 Rails 错误消息")
  end
end

raise Application::HttpError.new("自定义错误消息")

config.action_dispatch.show_exceptions = true

module ErrorHandling
  class<< self
    def all
      exceptions = [
        ActiveRecord::RecordNotFound,
        ActiveRecord::StaleObjectError,
        ActiveRecord::InvalidForeignKey,
        ActiveRecord::RecordNotDestroyed,
        ActiveRecord::ActiveRecordError,
        Application::HttpError,
        # ... add other exceptions as needed
      ]
      exceptions.flatten
    end

    def call(exception, env)
      exception = process_exception(exception, env) if respond_to?(:process_exception, true)
      handle_exception(exception, env)
    end
  end
end

<div><%= error_messages_path(@errors) %></div>

mount ErrorHandling::Application::HttpError => '/'