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体验新版 GitCode,发现更多精彩内容 >>
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479f3a95
编写于
8月 22, 2016
作者:
J
Jon Moss
提交者:
GitHub
8月 22, 2016
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Merge pull request #26231 from philipqnguyen/scoped-dependent-destroy
Doc on scoped has_many, dependent: :destroy
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activerecord/lib/active_record/associations.rb
activerecord/lib/active_record/associations.rb
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activerecord/lib/active_record/associations.rb
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@@ -1296,6 +1296,12 @@ module ClassMethods
# If using with the <tt>:through</tt> option, the association on the join model must be
# a #belongs_to, and the records which get deleted are the join records, rather than
# the associated records.
#
# If using <tt>dependent: :destroy</tt> on a scoped association, only the scoped objects are destroyed.
# For example, if a Post model defines
# <tt>has_many :comments, -> { where published: true }, dependent: :destroy</tt> and <tt>destroy</tt> is
# called on a post, only published comments are destroyed. This means that any unpublished comments in the
# database would still contain a foreign key pointing to the now deleted post.
# [:counter_cache]
# This option can be used to configure a custom named <tt>:counter_cache.</tt> You only need this option,
# when you customized the name of your <tt>:counter_cache</tt> on the #belongs_to association.
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