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author | Olli Jokinen <olli.jokinen@enemy.fi> | 2011-12-01 15:32:59 +0200 |
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committer | Olli Jokinen <olli.jokinen@enemy.fi> | 2011-12-01 15:32:59 +0200 |
commit | b4e1903d23a760028d58bc3bb20a1d491bfd4a4b (patch) | |
tree | a40bdce1bd4800124ab6eaed2a6be017bf9cfd3d /activesupport/lib/active_support/callbacks.rb | |
parent | fae9ad9c712decef70b379f5aa1faa0149902831 (diff) | |
parent | 1e51cd957e3c90f4be35f1f0c4c380d8f7d40d66 (diff) | |
download | rails-b4e1903d23a760028d58bc3bb20a1d491bfd4a4b.tar.gz rails-b4e1903d23a760028d58bc3bb20a1d491bfd4a4b.tar.bz2 rails-b4e1903d23a760028d58bc3bb20a1d491bfd4a4b.zip |
Merge remote-tracking branch 'upstream/master'
Diffstat (limited to 'activesupport/lib/active_support/callbacks.rb')
-rw-r--r-- | activesupport/lib/active_support/callbacks.rb | 73 |
1 files changed, 38 insertions, 35 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb index 656cba625c..11069301f1 100644 --- a/activesupport/lib/active_support/callbacks.rb +++ b/activesupport/lib/active_support/callbacks.rb @@ -81,6 +81,14 @@ module ActiveSupport send("_run_#{kind}_callbacks", *args, &block) end + private + + # A hook invoked everytime a before callback is halted. + # This can be overriden in AS::Callback implementors in order + # to provide better debugging/logging. + def halted_callback_hook(filter) + end + class Callback #:nodoc:# @@_callback_sequence = 0 @@ -153,7 +161,7 @@ module ActiveSupport @klass.class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1 def _one_time_conditions_valid_#{@callback_id}? - true #{key_options[0]} + true if #{key_options} end RUBY_EVAL end @@ -171,18 +179,18 @@ module ActiveSupport # if condition # before_save :filter_name, :if => :condition # filter_name # end - filter = <<-RUBY_EVAL - unless halted - # This double assignment is to prevent warnings in 1.9.3. I would - # remove the `result` variable, but apparently some other - # generated code is depending on this variable being set sometimes - # and sometimes not. + <<-RUBY_EVAL + if !halted && #{@compiled_options} + # This double assignment is to prevent warnings in 1.9.3 as + # the `result` variable is not always used except if the + # terminator code refers to it. result = result = #{@filter} halted = (#{chain.config[:terminator]}) + if halted + halted_callback_hook(#{@raw_filter.inspect.inspect}) + end 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. @@ -202,7 +210,7 @@ module ActiveSupport name = "_conditional_callback_#{@kind}_#{next_id}" @klass.class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1 def #{name}(halted) - #{@compiled_options[0] || "if true"} && !halted + if #{@compiled_options} && !halted #{@filter} do yield self end @@ -222,10 +230,12 @@ module ActiveSupport case @kind when :after - # if condition # after_save :filter_name, :if => :condition - # filter_name - # end - [@compiled_options[0], @filter, @compiled_options[1]].compact.join("\n") + # after_save :filter_name, :if => :condition + <<-RUBY_EVAL + if #{@compiled_options} + #{@filter} + end + RUBY_EVAL when :around <<-RUBY_EVAL value @@ -240,9 +250,7 @@ module ActiveSupport # symbols, string, procs, and objects), so compile a conditional # expression based on the options def _compile_options(options) - return [] if options[:if].empty? && options[:unless].empty? - - conditions = [] + conditions = ["true"] unless options[:if].empty? conditions << Array.wrap(_compile_filter(options[:if])) @@ -252,7 +260,7 @@ module ActiveSupport conditions << Array.wrap(_compile_filter(options[:unless])).map {|f| "!#{f}"} end - ["if #{conditions.flatten.join(" && ")}", "end"] + conditions.flatten.join(" && ") end # Filters support: @@ -371,42 +379,37 @@ module ActiveSupport # Generate the internal runner method called by +run_callbacks+. def __define_runner(symbol) #:nodoc: body = send("_#{symbol}_callbacks").compile + runner_method = "_run_#{symbol}_callbacks" silence_warnings do - undef_method "_run_#{symbol}_callbacks" if method_defined?("_run_#{symbol}_callbacks") + undef_method runner_method if method_defined?(runner_method) class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1 - def _run_#{symbol}_callbacks(key = nil, &blk) + def #{runner_method}(key = nil, &blk) if key - name = "_run__\#{self.class.name.hash.abs}__#{symbol}__\#{key.hash.abs}__callbacks" - - unless respond_to?(name) - self.class.__create_keyed_callback(name, :#{symbol}, self, &blk) - end - - send(name, &blk) + self.class.__run_keyed_callback(key, :#{symbol}, self, &blk) else #{body} end end - private :_run_#{symbol}_callbacks + private :#{runner_method} RUBY_EVAL end end - # This is called the first time a callback is called with a particular - # key. It creates a new callback method for the key, calculating - # which callbacks can be omitted because of per_key conditions. + # This method calls the callback method for the given key. + # If this called first time it creates a new callback method for the key, + # calculating which callbacks can be omitted because of per_key conditions. # - def __create_keyed_callback(name, kind, object, &blk) #:nodoc: - @_keyed_callbacks ||= {} - @_keyed_callbacks[name] ||= begin + def __run_keyed_callback(key, kind, object, &blk) #:nodoc: + name = "_run__#{self.name.hash.abs}__#{kind}__#{key.hash.abs}__callbacks" + unless object.respond_to?(name) str = send("_#{kind}_callbacks").compile(name, object) class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1 def #{name}() #{str} end protected :#{name} RUBY_EVAL - true end + object.send(name, &blk) end # This is used internally to append, prepend and skip callbacks to the |