# Boolean

#### Rules

```ruby
# 1. Pattern
'true_values'  => [true, 1, '1', 't', 'T', 'true', 'TRUE']
'false values' => [false, 0, '0', 'f', 'F', 'false', 'FALSE']
```

#### Usage

```ruby
class User < ActiveRecord::Base

  validates :input_0, boolean: true

end
```