vendor/rails/activesupport/lib/active_support/core_ext/hash/except.rb

   1 require 'set'
   2
   3 module ActiveSupport #:nodoc:
   4   module CoreExtensions #:nodoc:
   5     module Hash #:nodoc:
   6       # Return a hash that includes everything but the given keys. This is useful for
   7       # limiting a set of parameters to everything but a few known toggles:
   8       #
   9       #   @person.update_attributes(params[:person].except(:admin))
  10       module Except
  11         # Returns a new hash without the given keys.
  12         def except(*keys)
  13           dup.except!(*keys)
  14         end
  15
  16         # Replaces the hash without the given keys.
  17         def except!(*keys)
  18           keys.map! { |key| convert_key(key) } if respond_to?(:convert_key)
  19           keys.each { |key| delete(key) }
  20           self
  21         end
  22       end
  23     end
  24   end
  25 end