including Modules in controller - ruby-on-rails

Question

I have done a module in lib directory in ruby on rails application
its like
module Select
def self.included(base)
base.extend ClassMethods
end
module ClassMethods
def select_for(object_name, options={})
#does some operation
self.send(:include, Selector::InstanceMethods)
end
end
I called this in a controller like
include Selector
select_for :organization, :submenu => :general
but I want to call this in a function
i.e
def select
#Call the module here
end

Answer 1

Let's clarify: You have a method defined in a module, and you want that method to be used in an instance method.
class MyController < ApplicationController
include Select
# You used to call this in the class scope, we're going to move it to
# An instance scope.
#
# select_for :organization, :submenu => :general
def show # Or any action
# Now we're using this inside an instance method.
#
select_for :organization, :submenu => :general
end
end
I'm going to change your module slightly. This uses include instead of extend. extend is for adding class methods, and include it for adding instance methods:
module Select
def self.included(base)
base.class_eval do
include InstanceMethods
end
end
module InstanceMethods
def select_for(object_name, options={})
# Does some operation
self.send(:include, Selector::InstanceMethods)
end
end
end
That will give you an instance method. If you want both instance and class methods, you just add the ClassMethods module, and use extend instead of include:
module Select
def self.included(base)
base.class_eval do
include InstanceMethods
extend ClassMethods
end
end
module InstanceMethods
def select_for(object_name, options={})
# Does some operation
self.send(:include, Selector::InstanceMethods)
end
end
module ClassMethods
def a_class_method
end
end
end
Does that clear things up? In your example you defined a module as Select but included Selector in your controller...I just used Select in my code.