diff options
Diffstat (limited to 'activesupport/lib/active_support/callbacks.rb')
| -rw-r--r-- | activesupport/lib/active_support/callbacks.rb | 118 |
1 files changed, 62 insertions, 56 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb index 8f8def5922..32ebea8571 100644 --- a/activesupport/lib/active_support/callbacks.rb +++ b/activesupport/lib/active_support/callbacks.rb @@ -1,6 +1,6 @@ require 'active_support/descendants_tracker' require 'active_support/core_ext/array/wrap' -require 'active_support/core_ext/class/inheritable_attributes' +require 'active_support/core_ext/class/attribute' require 'active_support/core_ext/kernel/reporting' require 'active_support/core_ext/kernel/singleton_class' @@ -178,49 +178,48 @@ module ActiveSupport # options[0] is the compiled form of supplied conditions # options[1] is the "end" for the conditional # - if @kind == :before || @kind == :around - if @kind == :before - # if condition # before_save :filter_name, :if => :condition - # filter_name - # end - filter = <<-RUBY_EVAL - unless halted - result = #{@filter} - halted = (#{chain.config[:terminator]}) - end - RUBY_EVAL - - [@compiled_options[0], filter, @compiled_options[1]].compact.join("\n") - else - # Compile around filters with conditions into proxy methods - # that contain the conditions. - # - # For `around_save :filter_name, :if => :condition': - # - # def _conditional_callback_save_17 - # if condition - # filter_name do - # yield self - # end - # else - # yield self - # end - # end - # - name = "_conditional_callback_#{@kind}_#{next_id}" - @klass.class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1 - def #{name}(halted) - #{@compiled_options[0] || "if true"} && !halted - #{@filter} do - yield self - end - else + case @kind + when :before + # if condition # before_save :filter_name, :if => :condition + # filter_name + # end + filter = <<-RUBY_EVAL + unless halted + result = #{@filter} + halted = (#{chain.config[:terminator]}) + end + RUBY_EVAL + + [@compiled_options[0], filter, @compiled_options[1]].compact.join("\n") + when :around + # Compile around filters with conditions into proxy methods + # that contain the conditions. + # + # For `around_save :filter_name, :if => :condition': + # + # def _conditional_callback_save_17 + # if condition + # filter_name do + # yield self + # end + # else + # yield self + # end + # end + # + name = "_conditional_callback_#{@kind}_#{next_id}" + @klass.class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1 + def #{name}(halted) + #{@compiled_options[0] || "if true"} && !halted + #{@filter} do yield self end + else + yield self end - RUBY_EVAL - "#{name}(halted) do" - end + end + RUBY_EVAL + "#{name}(halted) do" end end @@ -229,15 +228,14 @@ module ActiveSupport def end(key=nil, object=nil) return if key && !object.send("_one_time_conditions_valid_#{@callback_id}?") - if @kind == :around || @kind == :after + case @kind + when :after # if condition # after_save :filter_name, :if => :condition # filter_name # end - if @kind == :after - [@compiled_options[0], @filter, @compiled_options[1]].compact.join("\n") - else - "end" - end + [@compiled_options[0], @filter, @compiled_options[1]].compact.join("\n") + when :around + "end" end end @@ -388,7 +386,7 @@ module ActiveSupport # key. See #define_callbacks for more information. # def __define_runner(symbol) #:nodoc: - body = send("_#{symbol}_callbacks").compile(nil) + body = send("_#{symbol}_callbacks").compile silence_warnings do undef_method "_run_#{symbol}_callbacks" if method_defined?("_run_#{symbol}_callbacks") @@ -437,7 +435,7 @@ module ActiveSupport ([self] + ActiveSupport::DescendantsTracker.descendants(self)).each do |target| chain = target.send("_#{name}_callbacks") - yield chain, type, filters, options + yield target, chain.dup, type, filters, options target.__define_runner(name) end end @@ -449,6 +447,10 @@ module ActiveSupport # set_callback :save, :after, :after_meth, :if => :condition # set_callback :save, :around, lambda { |r| stuff; yield; stuff } # + # If the second argument is not :before, :after or :around then an implicit :before is assumed. + # It means the first example mentioned above can also be written as: + # set_callback :save, :before_meth + # # Use skip_callback to skip any defined one. # # When creating or skipping callbacks, you can specify conditions that @@ -473,7 +475,7 @@ module ActiveSupport def set_callback(name, *filter_list, &block) mapped = nil - __update_callbacks(name, filter_list, block) do |chain, type, filters, options| + __update_callbacks(name, filter_list, block) do |target, chain, type, filters, options| mapped ||= filters.map do |filter| Callback.new(chain, filter, type, options.dup, self) end @@ -483,6 +485,8 @@ module ActiveSupport end options[:prepend] ? chain.unshift(*(mapped.reverse)) : chain.push(*mapped) + + target.send("_#{name}_callbacks=", chain) end end @@ -493,7 +497,7 @@ module ActiveSupport # end # def skip_callback(name, *filter_list, &block) - __update_callbacks(name, filter_list, block) do |chain, type, filters, options| + __update_callbacks(name, filter_list, block) do |target, chain, type, filters, options| filters.each do |filter| filter = chain.find {|c| c.matches?(type, filter) } @@ -505,6 +509,7 @@ module ActiveSupport chain.delete(filter) end + target.send("_#{name}_callbacks=", chain) end end @@ -514,12 +519,14 @@ module ActiveSupport callbacks = send("_#{symbol}_callbacks") ActiveSupport::DescendantsTracker.descendants(self).each do |target| - chain = target.send("_#{symbol}_callbacks") + chain = target.send("_#{symbol}_callbacks").dup callbacks.each { |c| chain.delete(c) } + target.send("_#{symbol}_callbacks=", chain) target.__define_runner(symbol) end - callbacks.clear + self.send("_#{symbol}_callbacks=", callbacks.dup.clear) + __define_runner(symbol) end @@ -589,9 +596,8 @@ module ActiveSupport def define_callbacks(*callbacks) config = callbacks.last.is_a?(Hash) ? callbacks.pop : {} callbacks.each do |callback| - extlib_inheritable_reader("_#{callback}_callbacks") do - CallbackChain.new(callback, config) - end + class_attribute "_#{callback}_callbacks" + send("_#{callback}_callbacks=", CallbackChain.new(callback, config)) __define_runner(callback) end end |