Camelize JSON keys in Rails

Works well with portrayal, and narrative Rails app design.

Add to your lib/camelize_json_keys.rb, then require and use as needed.

# USAGE
#
# class MyClass
#   include CamelizeJsonKeys.first_letter(:lower) # or :upper
#   …
# end
module CamelizeJsonKeys
  class << self
    def first_letter(first_letter_style)
      Module.new {
        define_method(:as_json) do |*args, **kwargs|
          super(*args, **kwargs).deep_transform_keys { |key|
            key.to_s.camelize(first_letter_style)
          }
        end
      }
    end
  end
end

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Code snippets in this post are covered by 0BSD License.

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