Rails：扩展alias_method_chain

Question

There is a Rails 4.2.6 application that has a core plugin extending ActiveRecord reload method via alias_method_chain .
I need to write another plugin extending the same base functionality and keeping what was added by the core plugin.
As far as I get it, I can call alias_method_chain only once but I wish to get something like this:

class Klass
  def foo
end

core_plugin:
  base.send :alias_method_chain, :foo, :bar

my_plugin:
  base.send :alias_method_chain, :foo, :baz

Where a call to Klass.foo results in calls to :baz , :bar and :foo

So what are my options assuming I cannot edit core_plugin?

Answer 1

You need something like this

class Klass

def foo
    puts "foo"
    end
def baz
    puts "printing baz..."
bar
    puts "...printing bar"
  end

  alias_method :bar, :foo
  alias_method :foo, :baz
end

Klass.new.foo

prints

printing baz... foo ...printing bar

Is this ur expectation? If not pls explain