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-rw-r--r--activerecord/lib/active_record/associations/collection_proxy.rb13
1 files changed, 13 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb
index 40f59f2c77..0131fa3a5b 100644
--- a/activerecord/lib/active_record/associations/collection_proxy.rb
+++ b/activerecord/lib/active_record/associations/collection_proxy.rb
@@ -177,6 +177,19 @@ module ActiveRecord
# pet.group == 'cats'
# end
# # => true
+
+ ##
+ # :method: include?
+ # Returns true if the given object is present in the collection.
+ #
+ # class Person < ActiveRecord::Base
+ # has_many :pets
+ # end
+ #
+ # person.pets # => [#<Pet id: 20, name: "Snoop">]
+ #
+ # person.pets.include?(Pet.find(20)) # => true
+ # person.pets.include?(Pet.find(21)) # => false
delegate :select, :find, :first, :last,
:build, :create, :create!,
:concat, :replace, :delete_all, :destroy_all, :delete, :destroy, :uniq,