method

replace

v4.2.1 - Show latest stable - 0 notes - Class: CollectionProxy

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What's this?

replace(other_array) public

Replaces this collection with other_array. This will perform a diff and delete/add only records that have changed.

class Person < ActiveRecord::Base
  has_many :pets
end

person.pets
# => [#<Pet id: 1, name: "Gorby", group: "cats", person_id: 1>]

other_pets = [Pet.new(name: 'Puff', group: 'celebrities']

person.pets.replace(other_pets)

person.pets
# => [#<Pet id: 2, name: "Puff", group: "celebrities", person_id: 1>]

If the supplied array has an incorrect association type, it raises an ActiveRecord::AssociationTypeMismatch error:

person.pets.replace(["doo", "ggie", "gaga"])
# => ActiveRecord::AssociationTypeMismatch: Pet expected, got String

Show source

# File activerecord/lib/active_record/associations/collection_proxy.rb, line 359
      def replace(other_array)
        @association.replace(other_array)
      end

replace

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