class ForbiddenAttributesError
Ruby on Rails 5.2.8.1
Since v4.0.13Raised 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">