diff options
Diffstat (limited to 'activesupport/lib/active_support/callbacks.rb')
| -rw-r--r-- | activesupport/lib/active_support/callbacks.rb | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb index c266b432c0..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 @@ -657,9 +660,17 @@ 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) |