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Merge pull request #17179 from eileencodes/clarify-delete-strategies-on-collection-proxy 

[ci skip] Clarify deletion strategies for collection proxies
This commit is contained in:
Zachary Scott 2014-10-04 17:02:25 -07:00
parent edc24da940 02d3a25361
commit b5a8fd7bb4
1 changed files with 14 additions and 17 deletions
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31
activerecord/lib/active_record/associations/collection_proxy.rb
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@ -355,14 +355,15 @@ module ActiveRecord
@association.replace(other_array)
end
# Deletes all the records from the collection. For +has_many+ associations,
# the deletion is done according to the strategy specified by the <tt>:dependent</tt>
# option.
# Deletes all the records from the collection according to the strategy
# specified by the +:dependent+ option. If no +:dependent+ option is given,
# then it will follow the default strategy.
#
# 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>. For, +has_many+ <tt>:through</tt>,
# the default strategy is +delete_all+.
# For +has_many :through+ associations, the default deletion strategy is
# +:delete_all+.
#
# For +has_many+ associations, the default deletion strategy is +:nullify+.
# This sets the foreign keys to +NULL+.
#
# class Person < ActiveRecord::Base
# has_many :pets # dependent: :nullify option by default
@ -393,9 +394,9 @@ module ActiveRecord
# # #<Pet id: 3, name: "Choo-Choo", person_id: nil>
# # ]
#
# If it is set to <tt>:destroy</tt> all the objects from the collection
# are removed by calling their +destroy+ method. See +destroy+ for more
# information.
# Both +has_many+ and +has_many :through+ dependencies default to the
# +:delete_all+ strategy if the +:dependent+ option is set to +:destroy+.
# Records are not instantiated and callbacks will not be fired.
#
# class Person < ActiveRecord::Base
# has_many :pets, dependent: :destroy
@ -410,11 +411,6 @@ module ActiveRecord
# # ]
#
# 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
@ -443,8 +439,9 @@ module ActiveRecord
end
# Deletes the records of the collection directly from the database
# ignoring the +:dependent+ option. It invokes +before_remove+,
# +after_remove+ , +before_destroy+ and +after_destroy+ callbacks.
# ignoring the +:dependent+ option. Records are instantiated and it
# invokes +before_remove+, +after_remove+ , +before_destroy+ and
# +after_destroy+ callbacks.
#
# class Person < ActiveRecord::Base
# has_many :pets