ri > ActiveSupport::Deprecation::DeprecatedInstanceVariableProxy

= ActiveSupport::Deprecation::DeprecatedInstanceVariableProxy < ActiveSupport::Deprecation::DeprecationProxy

(from /home/chedong/.local/share/rdoc)
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DeprecatedInstanceVariableProxy transforms an instance variable into a
deprecated one. 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 ActiveSupport::Deprecator if none
is specified.

  class Example
    def initialize
      @request = ActiveSupport::Deprecation::DeprecatedInstanceVariableProxy.new(self, :request, :@request)
      @_request = :special_request
    end

    def request
      @_request
    end

    def old_request
      @request
    end
  end

  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
     (Backtrace information…)
     "special_request"

  example.request.to_s
  # => "special_request"
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= Class methods:

  new