Quick questions on extensions/overrides

Rails
1

Say I want to extend/override a method on something like
ActionController.

Where should I put this “monkeypatch”? Currently I am putting it in
config/initializers but Im thinking there is a better place.

Thanks

2

Quoting BallaBall [email protected]:

Say I want to extend/override a method on something like
ActionController.

Where should I put this “monkeypatch”? Currently I am putting it in
config/initializers but Im thinking there is a better place.

app/controllers/application_controller.rb

It inherits from ActionController::Base and all other controllers
inherit from
it.

HTH,
Jeffrey

3

Thanks Jeffrey but I am aware of this. Like you said it inherits from
ActionController::Base but where should this file be kept?

For example if I reopen the class like:

module ActionController
class Base
def override_some_method
end
end
end

Where should the above code live? Like I said in my first post is that
I would create a file name action_controller_overrides.rb and place
that in config/initializers but I am unsure if that is the best place
to put it.

4

Short write up at:
http://www.therailsway.com/2009/4/6/controller-inheritance

Quoting Jeffrey L. Taylor [email protected]:

5

I meant this in a more general way. Where should I put overrides. The
example I listed for ApplicationController was just an example.

As another example say I want to override something in Memcache.

class Memcache

Overrides go here

end

Where would that go. Should it go in something like app/lib/, config/
initializers, config/overrides ?

6

You should never re-open a class like this, always use class_eval and
instance_eval:

Memcache.class_eval do

def your_instance_method_here
end

def self.your_class_method_here
end

end

Using class_eval instead of “re-defining” a class as you did will
require the class to be loaded BEFORE your code is run, which is
usually what you’re looking for.

Maurício Linhares
http://codeshooter.wordpress.com/ | http://twitter.com/mauriciojr

7

Why not put it in app/controllers/application_controller.rb? Are you
trying
to override the method for all Rails applications? Unless I do not
understand
what you are trying to do, I see no reason to not put it in
application_controller.rb. This is exactly what this class is for -
methods
common to all controllers.

Jeffrey

Quoting BallaBall [email protected]: