class ActionController::Parameters

def initialize(parameters = {})

Person.new(params) # => #
params.permitted? # => true
params = ActionController::Parameters.new(name: 'Francesco')

ActionController::Parameters.permit_all_parameters = true

Person.new(params) # => ActiveModel::ForbiddenAttributesError
params.permitted? # => false
params = ActionController::Parameters.new(name: 'Francesco')

end
class Person < ActiveRecord::Base

ActionController::Parameters.permit_all_parameters.
Also, sets the +permitted+ attribute to the default value of
Returns a new instance of ActionController::Parameters. 
def initialize(parameters = {})
  @parameters = parameters.with_indifferent_access
  @permitted = self.class.permit_all_parameters
end