instance method
count
Ruby on Rails 5.0.7.2
Since v4.0.13Signature
count(column_name = nil)Count all records using SQL.
class Person < ActiveRecord::Base
has_many :pets
end
person.pets.count # => 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>
# ]
Parameters
-
column_nameopt = nil
Source
# File activerecord/lib/active_record/associations/collection_proxy.rb, line 730
def count(column_name = nil)
@association.count(column_name)
end
Defined in activerecord/lib/active_record/associations/collection_proxy.rb line 730
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Defined in ActiveRecord::Associations::CollectionProxy