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author | Joshua Peek <josh@joshpeek.com> | 2011-04-12 21:56:00 -0500 |
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committer | Joshua Peek <josh@joshpeek.com> | 2011-04-12 21:56:00 -0500 |
commit | ed24595647374885cebc1d43badc174c0991e93a (patch) | |
tree | 020a8c856c264ed34deb872e54cf447e2fd872a3 /activerecord/lib/active_record/callbacks.rb | |
parent | d7b521db1297c1b95a441b3928fc31ab3abd5ed5 (diff) | |
parent | f0e198bfa1e3f9689e0cde1d194a44027fc90b3c (diff) | |
download | rails-ed24595647374885cebc1d43badc174c0991e93a.tar.gz rails-ed24595647374885cebc1d43badc174c0991e93a.tar.bz2 rails-ed24595647374885cebc1d43badc174c0991e93a.zip |
Merge branch 'master' into sprockets
Diffstat (limited to 'activerecord/lib/active_record/callbacks.rb')
-rw-r--r-- | activerecord/lib/active_record/callbacks.rb | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/callbacks.rb b/activerecord/lib/active_record/callbacks.rb index 86d58df99b..a175bf003c 100644 --- a/activerecord/lib/active_record/callbacks.rb +++ b/activerecord/lib/active_record/callbacks.rb @@ -214,6 +214,24 @@ module ActiveRecord # needs to be aware of it because an ordinary +save+ will raise such exception # instead of quietly returning +false+. # + # == Debugging callbacks + # + # The callback chain is accessible via the <tt>_*_callbacks</tt> method on an object. ActiveModel Callbacks support + # <tt>:before</tt>, <tt>:after</tt> and <tt>:around</tt> as values for the <tt>kind</tt> property. The <tt>kind</tt> property + # defines what part of the chain the callback runs in. + # + # To find all callbacks in the before_save callback chain: + # + # Topic._save_callbacks.select { |cb| cb.kind.eql?(:before) } + # + # Returns an array of callback objects that form the before_save chain. + # + # To further check if the before_save chain contains a proc defined as <tt>rest_when_dead</tt> use the <tt>filter</tt> property of the callback object: + # + # Topic._save_callbacks.select { |cb| cb.kind.eql?(:before) }.collect(&:filter).include?(:rest_when_dead) + # + # Returns true or false depending on whether the proc is contained in the before_save callback chain on a Topic model. + # module Callbacks extend ActiveSupport::Concern |