Helper method to convert from dot notation to hash

hash_helper.rb

def dot_to_hash(value)
  return value unless value.is_a?(Hash)
  value.deep_stringify_keys.each_with_object({}) do |(k,v), result|
    root, child = k.split('.')
    if child
      result[root] ||= {}
      result[root][child] = dot_to_hash(v)
    else
      result[root] = dot_to_hash(v)
    end
  end
end