method
find
v7.1.3.4 -
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Class: CollectionProxy
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find(*args)
public
Finds an object in the collection responding to the id. Uses the same rules as ActiveRecord::FinderMethods.find. Returns ActiveRecord::RecordNotFound error if the object cannot be found.
class Person < ActiveRecord::Base has_many :pets end 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> # ] person.pets.find(1) # => #<Pet id: 1, name: "Fancy-Fancy", person_id: 1> person.pets.find(4) # => ActiveRecord::RecordNotFound: Couldn't find Pet with 'id'=4 person.pets.find(2) { |pet| pet.name.downcase! } # => #<Pet id: 2, name: "fancy-fancy", person_id: 1> person.pets.find(2, 3) # => [ # #<Pet id: 2, name: "Spook", person_id: 1>, # #<Pet id: 3, name: "Choo-Choo", person_id: 1> # ]