yuku-t/activemodel-immutable_validator

# activemodel-immutable_validator

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Validate immutable attributes.

## Usage

Add to your Gemfile:

```rb
gem 'activemodel-immutable_validator'
```

Run:

```
bundle install
```

Then add the followng to your model which belongs to a user:

```rb
validates :attr, immutable: true
```

### Sample

A human cannot become a bot vice versa.

```rb
class User < ActiveRecord::Base
  validated :type, immutable: true
end

class Bot < User
end

class Human < User
end
```