class ActiveSupport::Deprecation::DeprecatedInstanceVariableProxy

This DeprecatedInstanceVariableProxy transforms instance variable to deprecated instance variable.

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

  def request
    @_request
  end

  def old_request
    @request
  end
end

When someone execute any method on @request variable this will trigger warn method on deprecator_instance and will fetch @_request variable via request method and execute the same method on non-proxy instance variable.

Default deprecator is ActiveSupport::Deprecation.

Public Class Methods

new(instance, method, var = "@ click to toggle source
# File lib/active_support/deprecation/proxy_wrappers.rb, line 79
def initialize(instance, method, var = "@#{method}", deprecator = ActiveSupport::Deprecation.instance)
  @instance = instance
  @method = method
  @var = var
  @deprecator = deprecator
end

Private Instance Methods

target() click to toggle source
# File lib/active_support/deprecation/proxy_wrappers.rb, line 87
def target
  @instance.__send__(@method)
end
warn(callstack, called, args) click to toggle source
# File lib/active_support/deprecation/proxy_wrappers.rb, line 91
def warn(callstack, called, args)
  @deprecator.warn("#{@var} is deprecated! Call #{@method}.#{called} instead of #{@var}.#{called}. Args: #{args.inspect}", callstack)
end