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require 'set'
module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module Hash #:nodoc:
# Return a hash that includes everything but the given keys. This is useful for
# limiting a set of parameters to everything but a few known toggles:
#
# @person.update_attributes(params[:person].except(:admin))
module Except
# Returns a new hash without the given keys.
def except(*keys)
rejected = Set.new(respond_to?(:convert_key) ? keys.map { |key| convert_key(key) } : keys)
reject { |key,| rejected.include?(key) }
end
# Replaces the hash without only the given keys.
def except!(*keys)
replace(except(*keys))
end
end
end
end
end
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