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-rw-r--r--activesupport/lib/active_support/callbacks.rb7
1 files changed, 6 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb
index 904d3f0eb0..1559fe641c 100644
--- a/activesupport/lib/active_support/callbacks.rb
+++ b/activesupport/lib/active_support/callbacks.rb
@@ -736,8 +736,13 @@ module ActiveSupport
#
# would call <tt>Audit#save</tt>.
#
- # NOTE: +method_name+ passed to `define_model_callbacks` must not end with
+ # ===== Notes
+ #
+ # +names+ passed to `define_callbacks` must not end with
# `!`, `?` or `=`.
+ #
+ # Calling `define_callbacks` multiple times with the same +names+ will
+ # overwrite previous callbacks registered with `set_callback`.
def define_callbacks(*names)
options = names.extract_options!