method

extra_keys

v2.3.8 - Show latest stable - Class: ActionController::Routing::Route

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.)

# File actionpack/lib/action_controller/routing/route.rb, line 252
        def extra_keys(hash, recall = {})
          (hash || {}).keys.map { |k| k.to_sym } - (recall || {}).keys - significant_keys
        end

extra_keys

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