无法在Ruby on Rails中用猴子补丁覆盖类方法

Question

So I am trying to override the class method reflect_on_association in ActiveRecord::Reflection . Here's the link to the original file: https://github.com/rails/rails/blob/master/activerecord/lib/active_record/reflection.rb

The method was defined on line 106.

These are my attempts so far:

1.

ActiveRecord::Reflection::ClassMethods.module_eval do
  # A test method
  def say_hello
    puts 'hello'
  end

  # I want to override the original method with this one
  def reflect_on_association(association)
    puts 'overridden!'
    # < Implementation goes here >
  end
end

2.

module ActiveRecord::Reflection::ClassMethods
  # A test method
  def say_hello
    puts 'hello'
  end

  # I want to override the original method with this one
  def reflect_on_association(association)
    puts 'overridden!'
    # < Implementation goes here >
  end
end

The say_hello methods works for both cases (for example when I call Person.say_hello ), but still no luck with reflect_on_association .

Anyone has any idea on how I can do this? Thank you very much!

Answer 1

working in may case!

make sure you are passing parameter with reflect_on_association.

1.9.3-p551 :514 > Person.reflect_on_association(state)
overridden!
=> nil