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You can now add an :inverse_of option to has_one, has_many and belongs_to associations. This is best described with an example: class Man < ActiveRecord::Base has_one :face, :inverse_of => :man end class Face < ActiveRecord::Base belongs_to :man, :inverse_of => :face end m = Man.first f = m.face Without :inverse_of m and f.man would be different instances of the same object (f.man being pulled from the database again). With these new :inverse_of options m and f.man are the same in memory instance. Currently :inverse_of supports has_one and has_many (but not the :through variants) associations. It also supplies inverse support for belongs_to associations where the inverse is a has_one and it's not a polymorphic. Signed-off-by: Murray Steele <muz@h-lame.com> Signed-off-by: Michael Koziarski <michael@koziarski.com> Signed-off-by: José Valim <jose.valim@gmail.com> Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net> Conflicts: activerecord/lib/active_record/associations/belongs_to_association.rb activerecord/lib/active_record/associations/has_one_association.rb
4 lines
80 B
Ruby
4 lines
80 B
Ruby
class Zine < ActiveRecord::Base
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has_many :interests, :inverse_of => :zine
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end
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