diff options
Diffstat (limited to 'activerecord/lib/active_record/associations/collection_proxy.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations/collection_proxy.rb | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb index b419b9a749..650d68a64a 100644 --- a/activerecord/lib/active_record/associations/collection_proxy.rb +++ b/activerecord/lib/active_record/associations/collection_proxy.rb @@ -218,6 +218,71 @@ module ActiveRecord # # person.pets.replace(["doo", "ggie", "gaga"]) # # => ActiveRecord::AssociationTypeMismatch: Pet expected, got String + + + ## + # :method: delete_all + # Deletes all the records from the collection. For +has_many+ it will do the + # deletion according to the strategy specified by the <tt>:dependent</tt> + # option. Returns an array with the deleted records. + # + # If no <tt>:dependent</tt> option is given, then it will follow the + # default strategy. The default strategy is <tt>:nullify</tt>. This + # sets the foreign keys to <tt>NULL</tt>. + # + # class Person < ActiveRecord::Base + # has_many :pets # dependent: :nullify option by default + # end + # + # person.pets.size # => 3 + # 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.delete_all + # # => [ + # # #<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.size # => 0 + # person.pets # => [] + # + # Pet.find(1, 2, 3) + # # => [ + # # #<Pet id: 1, name: "Fancy-Fancy", person_id: nil>, + # # #<Pet id: 2, name: "Spook", person_id: nil>, + # # #<Pet id: 3, name: "Choo-Choo", person_id: nil> + # # ] + # + # If it is set to <tt>:destroy</tt> all the objects from the collection + # are destroyed by calling their +destroy+ method. + # + # class Person < ActiveRecord::Base + # has_many :pets, dependent: :destroy + # end + # + # person.pets.size # => 3 + # 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.delete_all + # # => [ + # # #<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> + # # ] + # + # Pet.find(1, 2, 3) + # # => ActiveRecord::RecordNotFound ## # :method: destroy_all |