replace(other_array)
Instance Public methods
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
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