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

you can try this:

class ApplicationController < ActionController::API
  include ControllerHelper
  before_action :deep_underscore_params!

  def deep_underscore_params!(app_params = params)
    app_params.transform_keys!(&:underscore)
    app_params.each do |key, value|
      deep_underscore_params!(value) if value.instance_of?(ActionController::Parameters)
    end
    app_params.reject! { |k, v| v.blank? }
  end
end