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Short description Makes it possible to define has_many :through associations that go through other has_many :through associations, allowing them to span any number of tables.
Description This plugin makes it possible to define has_many :through relationships that go through other has_many :through relationships, possibly through an arbitrarily deep hierarchy. This allows associations across any number of tables to be constructed, without having to resort to find_by_sql (which isn't a suitable solution if you need to do eager loading through :include as well). It is hoped that this feature will in time be applied to the Rails core, after which this plugin will become unnecessary. See: http://dev.rubyonrails.org/ticket/6461 Example ------- class Pub < ActiveRecord::Base belongs_to :city end class City < ActiveRecord::Base belongs_to :country has_many :pubs end class Country < ActiveRecord::Base belongs_to :planet has_many :cities has_many :pubs, :through => cities end class Planet < ActiveRecord::Base belongs_to :star_system has_many :countries has_many :cities, :through => :countries # Now we go through a has_many :through association - # something that wasn't previously possible has_many :pubs, :through => :cities end class StarSystem < ActiveRecord::Base has_many :planets has_many :countries, :through => :planets # We can also use a has_many :through association for the source # association; in this case, Country#pubs has_many :pubs, :through => countries end
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License Ruby's Rails' (MIT) GPL LGPL BSD Apache Artistic PublicDomain BSD-type Free-Trial Free-but-Restricted OpenSource Proprietary Shareware Source-available-proprietary Commercial
Category Assets Controllers Internationalization Misc. Enhancements Model Rails Engines Searching and Queries Security Statistics and Logs Testing View Extensions
