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Versions: 20
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Contents
# encoding: utf-8
module Dynamoid #:nodoc:
# The has and belongs to many association.
module Associations
class HasAndBelongsToMany
include ManyAssociation
private
# Find the target association, always another :has_and_belongs_to_many association. Uses either options[:inverse_of] or the source class name
# and default parsing to return the most likely name for the target association.
#
# @since 0.2.0
def target_association
key_name = options[:inverse_of] || source.class.to_s.pluralize.underscore.to_sym
guess = target_class.associations[key_name]
return nil if guess.nil? || guess[:type] != :has_and_belongs_to_many
key_name
end
# Associate a source object to this association.
#
# @since 0.2.0
def associate_target(object)
ids = object.send(target_attribute) || Set.new
object.update_attribute(target_attribute, ids.merge(Array(source.id)))
end
# Disassociate a source object from this association.
#
# @since 0.2.0
def disassociate_target(object)
ids = object.send(target_attribute) || Set.new
object.update_attribute(target_attribute, ids - Array(source.id))
end
end
end
end
Version data entries
20 entries across 20 versions & 4 rubygems