Type:
Class
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
.