Module: WillPaginate::NamedScope

Defined in:
lib/will_paginate/finders/active_record/named_scope.rb

Overview

This is a feature backported from Rails 2.1 because of its usefullness not only with will_paginate, but in other aspects when managing complex conditions that you want to be reusable.

Defined Under Namespace

Modules: ClassMethods Classes: Scope

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object

All subclasses of ActiveRecord::Base have two named_scopes:

  • all, which is similar to a find(:all) query, and

  • scoped, which allows for the creation of anonymous scopes, on the fly: Shirt.scoped(:conditions => {:color => 'red'}).scoped(:include => :washing_instructions)

These anonymous scopes tend to be useful when procedurally generating complex queries, where passing intermediate values (scopes) around as first-class objects is convenient.


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# File 'lib/will_paginate/finders/active_record/named_scope.rb', line 11

def self.included(base)
  base.class_eval do
    extend ClassMethods
    named_scope :scoped, lambda { |scope| scope }
  end
end