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Class: CollectionProxy
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<<(*records)
public
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> # ]