21 Apr 2013, 10:38
Generic-user-small

Louis Rhys (22 posts)

I assume the method paginate for in @orders = Order.paginate page: params[:page], order: ‘created_at desc’, per_page: 10@ is from the will_paginate gem that we added in this iteration. But what I don’t understand, Order is an ActiveRecord::Base sublcass, how can an external gem add a new method definition to it?

Similar to this erb, @<p><%= will_paginate @orders %></p>@ Does it mean that @will_paginate@ method is added to the controller clase?

23 Apr 2013, 19:44
Samr_small_pragsmall

Sam Ruby (584 posts)

Unlike C#, in Ruby, classes are not immutable. You can add, modify, and remove methods on the fly.

Jump ahead to “Rails Plugins” chapter, or simply google for “Ruby Open Classes”.

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