instance method
<<
Ruby on Rails 4.1.16
Since v4.0.13Signature
<<(*records)Adds one or more records to the collection by setting their foreign keys to the association’s primary key. Returns self, so several appends may be chained together.
class Person < ActiveRecord::Base
has_many :pets
end
person.pets.size # => 0
person.pets << Pet.new(name: 'Fancy-Fancy')
person.pets << [Pet.new(name: 'Spook'), Pet.new(name: 'Choo-Choo')]
person.pets.size # => 3
person.id # => 1
person.pets
# => [
# #<Pet id: 1, name: "Fancy-Fancy", person_id: 1>,
# #<Pet id: 2, name: "Spook", person_id: 1>,
# #<Pet id: 3, name: "Choo-Choo", person_id: 1>
# ]
Parameters
-
recordsrest
Source
# File activerecord/lib/active_record/associations/collection_proxy.rb, line 975
def <<(*records)
proxy_association.concat(records) && self
end
Defined in activerecord/lib/active_record/associations/collection_proxy.rb line 975
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Defined in ActiveRecord::Associations::CollectionProxy