First read about WillPaginate::Finder::ClassMethods, then see WillPaginate::ViewHelpers. The magical array you‘re handling in-between is WillPaginate::Collection.
Happy paginating!
shortcut for enable_actionpack; enable_activerecord
# File lib/will_paginate.rb, line 13
13: def enable
14: enable_actionpack
15: enable_activerecord
16: end
mixes in WillPaginate::ViewHelpers in ActionView::Base
# File lib/will_paginate.rb, line 19
19: def enable_actionpack
20: return if ActionView::Base.instance_methods.include? 'will_paginate'
21: require 'will_paginate/view_helpers'
22: ActionView::Base.class_eval { include ViewHelpers }
23:
24: if defined?(ActionController::Base) and ActionController::Base.respond_to? :rescue_responses
25: ActionController::Base.rescue_responses['WillPaginate::InvalidPage'] = :not_found
26: end
27: end
mixes in WillPaginate::Finder in ActiveRecord::Base and classes that deal with associations
# File lib/will_paginate.rb, line 31
31: def enable_activerecord
32: return if ActiveRecord::Base.respond_to? :paginate
33: require 'will_paginate/finder'
34: ActiveRecord::Base.class_eval { include Finder }
35:
36: # support pagination on associations
37: a = ActiveRecord::Associations
38: returning([ a::AssociationCollection ]) { |classes|
39: # detect http://dev.rubyonrails.org/changeset/9230
40: unless a::HasManyThroughAssociation.superclass == a::HasManyAssociation
41: classes << a::HasManyThroughAssociation
42: end
43: }.each do |klass|
44: klass.class_eval do
45: include Finder::ClassMethods
46: alias_method_chain :method_missing, :paginate
47: end
48: end
49: end
Enable named_scope, a feature of Rails 2.1, even if you have older Rails (tested on Rails 2.0.2 and 1.2.6).
You can pass false for patch parameter to skip monkeypatching associations. Use this if you feel that named_scope broke has_many, has_many :through or has_and_belongs_to_many associations in your app. By passing false, you can still use named_scope in your models, but not through associations.
# File lib/will_paginate.rb, line 59
59: def enable_named_scope(patch = true)
60: return if defined? ActiveRecord::NamedScope
61: require 'will_paginate/named_scope'
62: require 'will_paginate/named_scope_patch' if patch
63:
64: ActiveRecord::Base.class_eval do
65: include WillPaginate::NamedScope
66: end
67: end