Class: ActiveSupport::Deprecation::DeprecatedConstantProxy
Relationships & Source Files | |
Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
::Module
|
|
Instance Chain:
self,
::Module ,
::Module::Concerning
|
|
Inherits: | Module |
Defined in: | activesupport/lib/active_support/deprecation/proxy_wrappers.rb |
Overview
DeprecatedConstantProxy
transforms a constant into a deprecated one. It takes the full names of an old (deprecated) constant and of a new constant (both in string form) and a deprecator. The deprecated constant now returns the value of the new one.
PLANETS = %w(mercury venus earth mars jupiter saturn uranus neptune pluto)
# (In a later update, the original implementation of {PLANETS} has been removed.)
PLANETS_POST_2006 = %w(mercury venus earth mars jupiter saturn uranus neptune)
PLANETS = ActiveSupport::Deprecation::DeprecatedConstantProxy.new("PLANETS", "PLANETS_POST_2006", ActiveSupport::Deprecation.new)
PLANETS.map { |planet| planet.capitalize }
# => DEPRECATION WARNING: PLANETS is deprecated! Use PLANETS_POST_2006 instead.
(Backtrace information…)
["Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune"]
Constant Summary
::Module
- Inherited
DELEGATION_RESERVED_KEYWORDS, DELEGATION_RESERVED_METHOD_NAMES, RUBY_RESERVED_KEYWORDS
Class Attribute Summary
::Module
- Inherited
Class Method Summary
Instance Attribute Summary
- #hash readonly
- #instance_methods readonly
- #name readonly
::Module
- Inherited
#anonymous? | A module may or may not have a name. |
Instance Method Summary
- #append_features(base)
-
#class
Returns the class of the new constant.
- #extended(base)
- #initialize(old_const, new_const, deprecator = nil, message: "#{old_const} is deprecated! Use #{new_const} instead.") ⇒ DeprecatedConstantProxy constructor
-
#inspect
Don’t give a deprecation warning on inspect since test/unit and error logs rely on it for diagnostics.
- #prepend_features(base)
- #respond_to? ⇒ Boolean
::Module
- Inherited
#alias_attribute | Allows you to make aliases for attributes, which includes getter, setter, and a predicate. |
#attr_internal | Alias for Module#attr_internal_accessor. |
#attr_internal_accessor | Declares an attribute reader and writer backed by an internally-named instance variable. |
#attr_internal_reader | Declares an attribute reader backed by an internally-named instance variable. |
#attr_internal_writer | Declares an attribute writer backed by an internally-named instance variable. |
#cattr_accessor | Alias for Module#mattr_accessor. |
#cattr_reader | Alias for Module#mattr_reader. |
#cattr_writer | Alias for Module#mattr_writer. |
#deep_dup | Returns a copy of module or class if it’s anonymous. |
#delegate | Provides a |
#delegate_missing_to | When building decorators, a common pattern may emerge: |
#deprecate | deprecate |
#mattr_accessor | Defines both class and instance accessors for class attributes. |
#mattr_reader | Defines a class attribute and creates a class and instance reader methods. |
#mattr_writer | Defines a class attribute and creates a class and instance writer methods to allow assignment to the attribute. |
#module_parent | Returns the module which contains this one according to its name. |
#module_parent_name | Returns the name of the module containing this one. |
#module_parents | Returns all the parents of this module according to its name, ordered from nested outwards. |
#redefine_method | Replaces the existing method definition, if there is one, with the passed block as its body. |
#redefine_singleton_method | Replaces the existing singleton method definition, if there is one, with the passed block as its body. |
#remove_possible_method | Removes the named method, if it exists. |
#remove_possible_singleton_method | Removes the named singleton method, if it exists. |
#silence_redefinition_of_method | Marks the named method as intended to be redefined, if it exists. |
#thread_cattr_accessor | Alias for Module#thread_mattr_accessor. |
#thread_cattr_reader | Alias for Module#thread_mattr_reader. |
#thread_cattr_writer | Alias for Module#thread_mattr_writer. |
#thread_mattr_accessor | Defines both class and instance accessors for class attributes. |
::Module::Concerning
- Included
#concern | A low-cruft shortcut to define a concern. |
#concerning | Define a new concern and mix it in. |
Constructor Details
.new(*args, **options, &block) ⇒ DeprecatedConstantProxy
# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 123
def self.new(*args, **, &block) object = args.first return object unless object super end
#initialize(old_const, new_const, deprecator = nil, message: "#{old_const} is deprecated! Use #{new_const} instead.") ⇒ DeprecatedConstantProxy
# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 130
def initialize(old_const, new_const, deprecator = nil, message: "#{old_const} is deprecated! Use #{new_const} instead.") Kernel.require "active_support/inflector/methods" @old_const = old_const @new_const = new_const ActiveSupport.deprecator.warn("DeprecatedConstantProxy without a deprecator is deprecated") unless deprecator @deprecator = deprecator || ActiveSupport::Deprecation._instance @message = end
Dynamic Method Handling
This class handles dynamic methods through the method_missing method
#method_missing(called, *args, &block) (private)
[ GitHub ]# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 186
def method_missing(called, *args, &block) @deprecator.warn(@message, caller_locations) target.__send__(called, *args, &block) end
Instance Attribute Details
#hash (readonly)
[ GitHub ]# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 150
delegate :hash, :instance_methods, :name, :respond_to?, to: :target
#instance_methods (readonly)
[ GitHub ]# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 150
delegate :hash, :instance_methods, :name, :respond_to?, to: :target
#name (readonly)
[ GitHub ]# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 150
delegate :hash, :instance_methods, :name, :respond_to?, to: :target
Instance Method Details
#append_features(base)
[ GitHub ]# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 161
def append_features(base) @deprecator.warn(@message, caller_locations) base.include(target) end
#class
Returns the class of the new constant.
PLANETS_POST_2006 = %w(mercury venus earth mars jupiter saturn uranus neptune)
PLANETS = ActiveSupport::Deprecation::DeprecatedConstantProxy.new('PLANETS', 'PLANETS_POST_2006')
PLANETS.class # => Array
# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 157
def class target.class end
#extended(base)
[ GitHub ]# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 171
def extended(base) @deprecator.warn(@message, caller_locations) base.extend(target) end
#inspect
Don’t give a deprecation warning on inspect since test/unit and error logs rely on it for diagnostics.
# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 144
def inspect target.inspect end
#prepend_features(base)
[ GitHub ]# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 166
def prepend_features(base) @deprecator.warn(@message, caller_locations) base.prepend(target) end
#respond_to? ⇒ Boolean
# File 'activesupport/lib/active_support/deprecation/proxy_wrappers.rb', line 150
delegate :hash, :instance_methods, :name, :respond_to?, to: :target