ruby - 在类内的每个方法中添加 rescue

Question

class A
  def a_method
    #..
  end
end

class B < A
  def method_1
    # ...
    a_method
  end

   def method_2
    # ...
    a_method
  end

  # ...

  def method_n
    # ...
    a_method
  end
end

a_method 偶尔会抛出 AException。

我想从那个异常中解救出来，比如:

class B < A
  def method_1
    # ...
    a_method
  rescue AException => e
    p e.message
  end

  # ...
end

我想在 B 类中的每个方法(method_1、method_2、...、method_n)中以相同的方式进行救援。我坚持想出一个漂亮而干净的解决方案，不需要复制救援代码块。你能帮我吗？

Answer 1

如何使用 block :

class B < A
  def method_1
    # some code here which do not raised an exception
    with_rescue do
      # method which raised exception
      a_method
    end
  end

  def method_2
    with_rescue do
      # ...
      a_method
    end
  end

  private 

  def with_rescue
    yield
  rescue => e
    ...
  end
end