ri > ActiveModel::ForbiddenAttributesError

= ActiveModel::ForbiddenAttributesError < StandardError

(from /home/chedong/.local/share/rdoc)
------------------------------------------------------------------------
Raised when forbidden attributes are used for mass assignment.

  class Person < ActiveRecord::Base
  end

  params = ActionController::Parameters.new(name: 'Bob')
  Person.new(params)
  # => ActiveModel::ForbiddenAttributesError

  params.permit!
  Person.new(params)
  # => #<Person id: nil, name: "Bob">
------------------------------------------------------------------------