method

key_matcher

rails latest stable - Class: ActiveSupport::Cache::Store

key_matcher(pattern, options)

private

Adds the namespace defined in the options to a pattern designed to match keys. Implementations that support delete_matched should call this method to translate a pattern that matches names into one that matches namespaced keys.

# File activesupport/lib/active_support/cache.rb, line 785
        def key_matcher(pattern, options) # :doc:
          prefix = options[:namespace].is_a?(Proc) ? options[:namespace].call : options[:namespace]
          if prefix
            source = pattern.source
            if source.start_with?("^")
              source = source[1, source.length]
            else
              source = ".*#{source[0, source.length]}"
            end
            Regexp.new("^#{Regexp.escape(prefix)}:#{source}", pattern.options)
          else
            pattern
          end
        end

key_matcher

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