method

extra_keys

rails latest stable - Class: ActionController::Routing::Route

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v2.3.8) is shown here.

extra_keys(hash, recall = {})
private

Determine which keys in the given hash are "extra". Extra keys are those that were not used to generate a particular route. The extra keys also do not include those recalled from the prior request, nor do they include any keys that were implied in the route (like a :controller that is required, but not explicitly used in the text of the route.)