AttributeCartographer allows you to map an attributes hash into similarly or differently named methods, using an optional lambda to map the values as well.
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gem install attribute_cartographer -v 0.0.6
= Attribute Cartographer * http://github.com/krishicks/attribute-cartographer == DESCRIPTION Attribute Cartographer allows you to map an attributes hash into similarly or differently named methods, using an optional lambda to map the values as well. == INSTALL Add attribute-cartographer to your Gemfile gem 'attribute-cartographer' Then run: $ bundle == USAGE class Mapper include AttributeCartographer # one-way mapping map "UnchangedKey" # map a single key, value untouched map %w{ UnchangedKey1 UnchangedKey2 } # same as above, but for multiple in a single statement map "SameKeyNewValue", ->(v) { v.downcase } # maps the key, using the lambda for the value map %w{ SameKeyNewValue1 SameKeyNewValue2 }, ->(v) { v.upcase } # same as above, but for multiple in a single statement map "OldKey", "new_key", ->(v) { v.downcase } # maps the left key to the right key, using the lambda for the value map "DowncasedKeyAndValue", ->(k,v) { [k.downcase, v.downcase] } # maps the key and value using the lambda for both map %w{ NewKeyAndValue1 NewKeyAndValue2 }, ->(k,v) { [k.downcase, v.downcase] } # same as the example above, but for multiple in a single statement # two-way mapping map "AnotherOldKey", "another_new_key" # map the left key to the right key and vice-versa, value untouched map "ThisKey", "to_this_key", ->(v) { v.downcase }, ->(v) { v.upcase } # map the left key to the right key with the first lambda, # and the right key to the left key with the second lambda end Mapper.new("UnchangedKey" => "UnchangedValue", "OldKey" => "OldValue") # etc. For each mapping defined, an entry in mapped_attributes will be made using the logic defined in the mapping. You also get another method, original_attributes, that retains the entire hash that was passed to #initialize, whether the keys were mapped or not. == REQUIREMENTS * Ruby 1.9.x == LICENSE MIT