diff options
Diffstat (limited to 'activesupport/lib/active_support/callbacks.rb')
| -rw-r--r-- | activesupport/lib/active_support/callbacks.rb | 75 |
1 files changed, 13 insertions, 62 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb index 6de49409e5..a9253c186d 100644 --- a/activesupport/lib/active_support/callbacks.rb +++ b/activesupport/lib/active_support/callbacks.rb @@ -23,8 +23,6 @@ module ActiveSupport # methods, procs or lambdas, or callback objects that respond to certain predetermined # methods. See +ClassMethods.set_callback+ for details. # - # ==== Example - # # class Record # include ActiveSupport::Callbacks # define_callbacks :save @@ -54,7 +52,6 @@ module ActiveSupport # saving... # - save # saved - # module Callbacks extend Concern @@ -73,10 +70,9 @@ module ActiveSupport # run_callbacks :save do # save # end - # - def run_callbacks(kind, key = nil, &block) - #TODO: deprecate key argument - self.class.__run_callbacks(kind, self, &block) + def run_callbacks(kind, &block) + runner_name = self.class.__define_callbacks(kind, self) + send(runner_name, &block) end private @@ -187,7 +183,7 @@ module ActiveSupport # Compile around filters with conditions into proxy methods # that contain the conditions. # - # For `around_save :filter_name, :if => :condition': + # For `set_callback :save, :around, :filter_name, :if => :condition': # # def _conditional_callback_save_17 # if condition @@ -198,7 +194,6 @@ module ActiveSupport # yield self # end # end - # def define_conditional_callback name = "_conditional_callback_#{@kind}_#{next_id}" @klass.class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1 @@ -252,7 +247,6 @@ module ActiveSupport # Objects:: # a method is created that calls the before_foo method # on the object. - # def _compile_filter(filter) method_name = "_callback_#{@kind}_#{next_id}" case filter @@ -307,7 +301,6 @@ module ActiveSupport @name = name @config = { :terminator => "false", - :rescuable => false, :scope => [ :kind ] }.merge(config) end @@ -317,32 +310,13 @@ module ActiveSupport method << "value = nil" method << "halted = false" - callbacks = yielding + callbacks = "value = !halted && (!block_given? || yield)" reverse_each do |callback| callbacks = callback.apply(callbacks) end method << callbacks - method << "raise rescued_error if rescued_error" if config[:rescuable] - method << "halted ? false : (block_given? ? value : true)" - method.flatten.compact.join("\n") - end - - # Returns part of method that evaluates the callback block - def yielding - method = [] - if config[:rescuable] - method << "rescued_error = nil" - method << "begin" - end - - method << "value = yield if block_given? && !halted" - - if config[:rescuable] - method << "rescue Exception => e" - method << "rescued_error = e" - method << "end" - end + method << "value" method.join("\n") end @@ -350,29 +324,19 @@ module ActiveSupport module ClassMethods - # This method runs callback chain for the given kind. - # If this called first time it creates a new callback method for the kind. + # This method defines callback chain method for the given kind + # if it was not yet defined. # This generated method plays caching role. - # - def __run_callbacks(kind, object, &blk) #:nodoc: - name = __callback_runner_name(kind) + def __define_callbacks(kind, object) #:nodoc: + chain = object.send("_#{kind}_callbacks") + name = "_run_callbacks_#{chain.object_id.abs}" unless object.respond_to?(name, true) - str = object.send("_#{kind}_callbacks").compile class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1 - def #{name}() #{str} end + def #{name}() #{chain.compile} end protected :#{name} RUBY_EVAL end - object.send(name, &blk) - end - - def __reset_runner(symbol) - name = __callback_runner_name(symbol) - undef_method(name) if method_defined?(name) - end - - def __callback_runner_name(kind) - "_run__#{self.name.hash.abs}__#{kind}__callbacks" + name end # This is used internally to append, prepend and skip callbacks to the @@ -386,7 +350,6 @@ module ActiveSupport ([self] + ActiveSupport::DescendantsTracker.descendants(self)).reverse.each do |target| chain = target.send("_#{name}_callbacks") yield target, chain.dup, type, filters, options - target.__reset_runner(name) end end @@ -425,7 +388,6 @@ module ActiveSupport # will be called only when it returns a false value. # * <tt>:prepend</tt> - If true, the callback will be prepended to the existing # chain rather than appended. - # def set_callback(name, *filter_list, &block) mapped = nil @@ -450,7 +412,6 @@ module ActiveSupport # class Writer < Person # skip_callback :validate, :before, :check_membership, :if => lambda { self.age > 18 } # end - # def skip_callback(name, *filter_list, &block) __update_callbacks(name, filter_list, block) do |target, chain, type, filters, options| filters.each do |filter| @@ -469,7 +430,6 @@ module ActiveSupport end # Remove all set callbacks for the given event. - # def reset_callbacks(symbol) callbacks = send("_#{symbol}_callbacks") @@ -477,12 +437,9 @@ module ActiveSupport chain = target.send("_#{symbol}_callbacks").dup callbacks.each { |c| chain.delete(c) } target.send("_#{symbol}_callbacks=", chain) - target.__reset_runner(symbol) end self.send("_#{symbol}_callbacks=", callbacks.dup.clear) - - __reset_runner(symbol) end # Define sets of events in the object lifecycle that support callbacks. @@ -508,11 +465,6 @@ module ActiveSupport # if callback chain was terminated or not. # Option makes sence only when <tt>:terminator</tt> option is specified. # - # * <tt>:rescuable</tt> - By default, after filters are not executed if - # the given block or a before filter raises an error. By setting this option - # to <tt>true</tt> exception raised by given block is stored and after - # executing all the after callbacks the stored exception is raised. - # # * <tt>:scope</tt> - Indicates which methods should be executed when an object # is used as a callback. # @@ -555,7 +507,6 @@ module ActiveSupport # define_callbacks :save, :scope => [:name] # # would call <tt>Audit#save</tt>. - # def define_callbacks(*callbacks) config = callbacks.last.is_a?(Hash) ? callbacks.pop : {} callbacks.each do |callback| |