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-rw-r--r--activesupport/lib/active_support/callbacks.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb
index c266b432c0..487fe79f41 100644
--- a/activesupport/lib/active_support/callbacks.rb
+++ b/activesupport/lib/active_support/callbacks.rb
@@ -657,9 +657,17 @@ module ActiveSupport
# * <tt>:if</tt> - A symbol or an array of symbols, each naming an instance
# method or a proc; the callback will be called only when they all return
# a true value.
+ #
+ # If a proc is given, its body is evaluated in the context of the
+ # current object. It can also optionally accept the current object as
+ # an argument.
# * <tt>:unless</tt> - A symbol or an array of symbols, each naming an
# instance method or a proc; the callback will be called only when they
# all return a false value.
+ #
+ # If a proc is given, its body is evaluated in the context of the
+ # current object. It can also optionally accept the current object as
+ # an argument.
# * <tt>:prepend</tt> - If +true+, the callback will be prepended to the
# existing chain rather than appended.
def set_callback(name, *filter_list, &block)