What is the best way to convert all controller params from camelCase to snake_case in Rails?

Question

As you already know, JSON naming convention advocates the use of camelSpace and the Rails advocates the use of snake_case for parameter names.

What is the best way t

Answer 1

I couldn't use other suggestions here directly, but it got me on the right track.

With Rails 5.2, using a versioned API and thus unable to change it for the whole application. I created this concern which i then included into the base controller of my new api version module.

module UnderscoreizeParams
  extend ActiveSupport::Concern

  def process_action(*args)
    request.parameters.deep_transform_keys!(&:underscore)
    super
  end
end

then in my API V3 BaseController

class V3::BaseController
  include UnderscoreizeParams
end

enjoy.