diff options
| -rw-r--r-- | activerecord/lib/active_record/associations/collection_proxy.rb | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb index 9ee69157b3..6c8fcec0c4 100644 --- a/activerecord/lib/active_record/associations/collection_proxy.rb +++ b/activerecord/lib/active_record/associations/collection_proxy.rb @@ -168,6 +168,37 @@ module ActiveRecord # another_person_without.pets.last(3) # => [] ## + # :method: build + # + # :call-seq: + # build(attributes = {}, options = {}, &block) + # + # Returns a new object of the collection type that has been instantiated + # with +attributes+ and linked to this object, but have not yet been saved. + # You can pass an array of attributes hashes, this will return an array + # with the new objects. + # + # class Person + # has_many :pets + # end + # + # person.pets.build + # # => #<Pet id: nil, name: nil, person_id: 1> + # + # person.pets.build(name: 'Fancy-Fancy') + # # => #<Pet id: nil, name: "Fancy-Fancy", person_id: 1> + # + # person.pets.build([{name: 'Spook'}, {name: 'Choo-Choo'}, {name: 'Brain'}]) + # # => [ + # # #<Pet id: nil, name: "Spook", person_id: 1>, + # # #<Pet id: nil, name: "Choo-Choo", person_id: 1>, + # # #<Pet id: nil, name: "Brain", person_id: 1> + # # ] + # + # person.pets.size # => 5 # size of the collection + # person.pets.count # => 0 # count from database + + ## # :method: concat # Add one or more records to the collection by setting their foreign keys # to the association's primary key. Since << flattens its argument list and |