> For the complete documentation index, see [llms.txt](https://kelby.gitbook.io/rails-beginner-s-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kelby.gitbook.io/rails-beginner-s-guide/activemodel/activemodel_source_review.md).

# 其它

## ~~Forbidden Attributes Error~~

```ruby
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">
```