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-rw-r--r--activesupport/lib/active_support/callbacks.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb
index 487fe79f41..d0644a0f7e 100644
--- a/activesupport/lib/active_support/callbacks.rb
+++ b/activesupport/lib/active_support/callbacks.rb
@@ -23,6 +23,9 @@ module ActiveSupport
# +ClassMethods.set_callback+), and run the installed callbacks at the
# appropriate times (via +run_callbacks+).
#
+ # By default callbacks are halted by throwing +:abort+.
+ # See +ClassMethods.define_callbacks+ for details.
+ #
# Three kinds of callbacks are supported: before callbacks, run before a
# certain event; after callbacks, run after the event; and around callbacks,
# blocks that surround the event, triggering it when they yield. Callback code