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dupable.rb
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module Concerns | |
module Dupable | |
def duplicate | |
# copy self with attributes only, includes belongs_to associations | |
duplicate = self.dup | |
# copy all has_many associations... | |
# reject through target associations, we only want to duplicate the association models | |
self.class.reflect_on_all_associations(:has_many).select { |a| a.through_reflection.nil? }.each do |assoc| | |
duplicate.send(:"#{assoc.name}=", self.send(assoc.name.to_sym).map { |item| | |
item = item.respond_to?(:duplicate) ? item.duplicate : item.dup | |
# delete foreign_key | |
item.send(:"#{assoc.foreign_key}=", nil) | |
# populate inverse assoc if present | |
if assoc.inverse_of.present? | |
item.send(:"#{assoc.inverse_of.name}=", duplicate) | |
end | |
item | |
}) | |
end | |
# copy all has_many through target by copying collection_ids... only needed to populate throught association targets and pass some children presence validations | |
# rails is too dumb to inspect association models and deduce through association targets | |
# | |
self.class.reflect_on_all_associations(:has_many).select { |a| a.through_reflection.present? }.each do |assoc| | |
duplicate.send(:"#{assoc.name.to_s.singularize}_ids=", self.send(:"#{assoc.name.to_s.singularize.to_sym}_ids")) | |
end | |
# copy all has_one associations | |
self.class.reflect_on_all_associations(:has_one).each do |assoc| | |
item = self.send(assoc.name.to_sym) | |
duplicate.send(:"#{assoc.name}=", item.respond_to?(:duplicate) ? item.duplicate : item.dup) if !item.nil? | |
end | |
duplicate | |
end | |
end | |
end |
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