diff options
| -rw-r--r-- | activesupport/lib/active_support/deprecation/proxy_wrappers.rb | 60 |
1 files changed, 38 insertions, 22 deletions
diff --git a/activesupport/lib/active_support/deprecation/proxy_wrappers.rb b/activesupport/lib/active_support/deprecation/proxy_wrappers.rb index a03a66b96b..dedcdfdb60 100644 --- a/activesupport/lib/active_support/deprecation/proxy_wrappers.rb +++ b/activesupport/lib/active_support/deprecation/proxy_wrappers.rb @@ -25,15 +25,17 @@ module ActiveSupport end end - # This DeprecatedObjectProxy transforms object to deprecated object. + # DeprecatedObjectProxy transforms an object into a deprecated object. It takes an object, + # a deprecation message, and optionally a deprecator. The deprecator defaults to + # <tt>ActiveSupport::Deprecator</tt> if none is specified. # - # @old_object = DeprecatedObjectProxy.new(Object.new, "Don't use this object anymore!") - # @old_object = DeprecatedObjectProxy.new(Object.new, "Don't use this object anymore!", deprecator_instance) + # deprecated_object = ActiveSupport::Deprecation::DeprecatedObjectProxy.new(Object.new, "This object is now deprecated") + # # => <Object:0x007fb9b34c34b0> # - # When someone executes any method except +inspect+ on proxy object this will - # trigger +warn+ method on +deprecator_instance+. - # - # Default deprecator is <tt>ActiveSupport::Deprecation</tt> + # deprecated_object.to_s + # DEPRECATION WARNING: This object is now deprecated. + # (Backtrace) + # # => "<Object:0x007fb9b34c34b0>" class DeprecatedObjectProxy < DeprecationProxy def initialize(object, message, deprecator = ActiveSupport::Deprecation.instance) @object = object @@ -51,13 +53,15 @@ module ActiveSupport end end - # This DeprecatedInstanceVariableProxy transforms instance variable to - # deprecated instance variable. + # DeprecatedInstanceVariableProxy transforms an instance variable into a deprecated + # instance variable. It takes an instance of a class, a method on that class, and an + # instance variable. It optionally takes a deprecator as the last argument. The deprecator + # defaults to <tt>ActiveSupport::Deprecator</tt> if none is specified. # # class Example - # def initialize(deprecator) + # def initialize # @request = ActiveSupport::Deprecation::DeprecatedInstanceVariableProxy.new(self, :request, :@request, deprecator) - # @_request = :a_request + # @_request = :special_request # end # # def request @@ -69,12 +73,17 @@ module ActiveSupport # end # end # - # When someone execute any method on @request variable this will trigger - # +warn+ method on +deprecator_instance+ and will fetch <tt>@_request</tt> - # variable via +request+ method and execute the same method on non-proxy - # instance variable. + # example = Example.new + # # => #<Example:0x007fb9b31090b8 @_request=:special_request, @request=:special_request> + # + # example.old_request.to_s + # # => DEPRECATION WARNING: @request is deprecated! Call request.to_s instead of + # @request.to_s + # (Bactrace information…) + # "special_request" # - # Default deprecator is <tt>ActiveSupport::Deprecation</tt>. + # example.request.to_s + # # => "special_request" class DeprecatedInstanceVariableProxy < DeprecationProxy def initialize(instance, method, var = "@#{method}", deprecator = ActiveSupport::Deprecation.instance) @instance = instance @@ -93,15 +102,22 @@ module ActiveSupport end end - # This DeprecatedConstantProxy transforms constant to deprecated constant. + # DeprecatedConstantProxy transforms a constant into a deprecated constant. It takes the names of an old + # (deprecated) constant and a new contstant (both in string form), and optionally a deprecator. The + # deprecator defaults to <tt>ActiveSupport::Deprecator</tt> if none is specified. The deprecated constant + # now returns the return value of the new constant. + # + # PLANETS = %w(mercury venus earth mars jupiter saturn uranus neptune pluto) # - # OLD_CONST = ActiveSupport::Deprecation::DeprecatedConstantProxy.new('OLD_CONST', 'NEW_CONST') - # OLD_CONST = ActiveSupport::Deprecation::DeprecatedConstantProxy.new('OLD_CONST', 'NEW_CONST', deprecator_instance) + # (In a later update, the orignal implementation of `PLANETS` has been removed.) # - # When someone use old constant this will trigger +warn+ method on - # +deprecator_instance+. + # PLANETS_POST_2006 = %w(mercury venus earth mars jupiter saturn uranus neptune) + # PLANETS = ActiveSupport::Deprecation::DeprecatedConstantProxy.new('PLANETS', 'PLANETS_POST_2006') # - # Default deprecator is <tt>ActiveSupport::Deprecation</tt>. + # PLANETS.map { |planet| planet.capitalize } + # # => DEPRECATION WARNING: PLANETS is deprecated! Use PLANETS_POST_2006 instead. + # (Bactrace information…) + # ["Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune"] class DeprecatedConstantProxy < DeprecationProxy def initialize(old_const, new_const, deprecator = ActiveSupport::Deprecation.instance) @old_const = old_const |