ruby-on-rails - 使用httparty的用户名/密码错误处理

Question

我正在使用httparty创建本地gem，以连接到特定网站以获取身份验证 token 。输入正确的电子邮件和密码后，我可以使程序获取auth_token。但是，如果我输入了错误的电子邮件/密码，它将返回:NameError: uninitialized constant Gemname::InvalidStudentCodeError

require 'httparty'
class Gemname
  include HTTParty

  def initialize(email, password)
    response = self.class.post("https://www.website.io/api/v1/sessions", body: {"email": email, "password": password})
#####error-handler#####
    if StandardError
      puts "invalid email/pass"
    end
#######################
    @auth_token = response["auth_token"]
  end
end

似乎大多数错误都归类为standard error。

这个想法是从irb Gemname.new('email', 'wrong-password')运行，它将返回"Wrong email/password"。如何处理错误以显示正确的消息？

编辑:
我在初始化时尝试了以下代码:

if StandardError
  "error"
end

我也试过

在lib文件夹上创建，该文件夹名为gemname-> error.rb
error.rb:

class InvalidStudentCodeError < StandardError
  def initialize(msg="invalid email or password")
    super(msg)
  end
end

然后初始化:

raise InvalidStudentCodeError.new() if response.code == 401

Answer 1

下列升高方法解决了它:

 def initialize(email, password)
    response = self.class.post("https://www.website.io/api/v1/sessions", body: {"email": email, "password": password})
    raise "invalid email/pass, bud" if response.code != 200
    @auth_token = response["auth_token"]
  end