抽象异常检查

发布于 2024-10-05 13:29:01 字数 293 浏览 2 评论 0原文

我有一系列使用相同异常处理的方法。

如何将异常检查抽象为单独的函数？

请参阅下面的示例，非常感谢您的帮助！

def a
  code
  begin
    rescue 1...
    rescue 2...
    rescue 3...
    rescue 4...
  end
end

def b
  code
  begin
    rescue 1...
    rescue 2...
    rescue 3...
    rescue 4...
  end
end

原文

I have a range of methods that use the same exception handling.

How can I abstract out the exception checking into a separate function?

See example below, thanks a lot for your help folks!

def a
  code
  begin
    rescue 1...
    rescue 2...
    rescue 3...
    rescue 4...
  end
end

def b
  code
  begin
    rescue 1...
    rescue 2...
    rescue 3...
    rescue 4...
  end
end

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黑寡妇 2024-10-12 13:29:01

最简单的解决方案是将代码作为块传递给方法，并在 begin/rescue 表达式中屈服于它：

def run_code_and_handle_exceptions
  begin
    yield
  rescue 1...
  rescue 2...
  rescue 3...
  rescue 4...
  end
end

# Elsewhere...
def a
  run_code_and_handle_exceptions do
    code
  end
end
# etc...

您可能希望想出比 run_code_and_handle_exceptions 更简洁的方法名称！

The simplest solution would be to pass your code to a method as a block and yield to it within a begin/rescue expression:

def run_code_and_handle_exceptions
  begin
    yield
  rescue 1...
  rescue 2...
  rescue 3...
  rescue 4...
  end
end

# Elsewhere...
def a
  run_code_and_handle_exceptions do
    code
  end
end
# etc...

You may want to come up with a more succinct method name than run_code_and_handle_exceptions!

回复收藏 0 原文

少女情怀诗 2024-10-12 13:29:01

在控制器中，我使用了rescue_from功能。非常干燥：

class HelloWorldController < ApplicationController
  rescue_from ActiveRecord::RecordNotFound, :with => :handle_unfound_record

  def handle_unfound_record
    # Exception handling...
  end

In controllers I've used rescue_from -functionality. It's quite DRY:

class HelloWorldController < ApplicationController
  rescue_from ActiveRecord::RecordNotFound, :with => :handle_unfound_record

  def handle_unfound_record
    # Exception handling...
  end

回复收藏 0 原文

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