diff options
Diffstat (limited to 'activerecord/lib/active_record/associations/collection_proxy.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations/collection_proxy.rb | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb index b9aed05135..9350064028 100644 --- a/activerecord/lib/active_record/associations/collection_proxy.rb +++ b/activerecord/lib/active_record/associations/collection_proxy.rb @@ -715,12 +715,13 @@ module ActiveRecord end alias uniq distinct - # Count all records using SQL. + # Count all records. # # class Person < ActiveRecord::Base # has_many :pets # end # + # # This will perform the count using SQL. # person.pets.count # => 3 # person.pets # # => [ @@ -728,8 +729,13 @@ module ActiveRecord # # #<Pet id: 2, name: "Spook", person_id: 1>, # # #<Pet id: 3, name: "Choo-Choo", person_id: 1> # # ] - def count(column_name = nil) - @association.count(column_name) + # + # Passing a block will select all of a person's pets in SQL and then + # perform the count using Ruby. + # + # person.pets.count { |pet| pet.name.include?('-') } # => 2 + def count(column_name = nil, &block) + @association.count(column_name, &block) end # Returns the size of the collection. If the collection hasn't been loaded, |