diff options
Diffstat (limited to 'activesupport/lib/active_support/callbacks.rb')
| -rw-r--r-- | activesupport/lib/active_support/callbacks.rb | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/activesupport/lib/active_support/callbacks.rb b/activesupport/lib/active_support/callbacks.rb index d2911a254c..0f1de8b076 100644 --- a/activesupport/lib/active_support/callbacks.rb +++ b/activesupport/lib/active_support/callbacks.rb @@ -4,6 +4,7 @@ require 'active_support/core_ext/array/extract_options' require 'active_support/core_ext/class/attribute' require 'active_support/core_ext/kernel/reporting' require 'active_support/core_ext/kernel/singleton_class' +require 'active_support/core_ext/string/filters' require 'thread' module ActiveSupport @@ -142,8 +143,8 @@ module ActiveSupport halted = env.halted if !halted && user_conditions.all? { |c| c.call(target, value) } - result = user_callback.call target, value - env.halted = halted_lambda.call(target, result) + result_lambda = -> { user_callback.call target, value } + env.halted = halted_lambda.call(target, result_lambda) if env.halted target.send :halted_callback_hook, filter end @@ -161,8 +162,9 @@ module ActiveSupport halted = env.halted unless halted - result = user_callback.call target, value - env.halted = halted_lambda.call(target, result) + result_lambda = -> { user_callback.call target, value } + env.halted = halted_lambda.call(target, result_lambda) + if env.halted target.send :halted_callback_hook, filter end @@ -514,10 +516,17 @@ module ActiveSupport attr_reader :name, :config + # If true, any callback returning +false+ will halt the entire callback + # chain and display a deprecation message. If false, callback chains will + # only be halted by calling +throw :abort+. Defaults to +true+. + class_attribute :halt_and_display_warning_on_return_false + self.halt_and_display_warning_on_return_false = true + def initialize(name, config) @name = name @config = { - :scope => [ :kind ] + scope: [:kind], + terminator: default_terminator }.merge!(config) @chain = [] @callbacks = nil @@ -588,6 +597,28 @@ module ActiveSupport @callbacks = nil @chain.delete_if { |c| callback.duplicates?(c) } end + + def default_terminator + Proc.new do |target, result_lambda| + terminate = true + catch(:abort) do + result = result_lambda.call if result_lambda.is_a?(Proc) + if halt_and_display_warning_on_return_false && result == false + display_deprecation_warning_for_false_terminator + else + terminate = false + end + end + terminate + end + end + + def display_deprecation_warning_for_false_terminator + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Returning `false` in a callback will not implicitly halt a callback chain in the next release of Rails. + To explicitly halt a callback chain, please use `throw :abort` instead. + MSG + end end module ClassMethods |