Transformable

Lets you manipulate data as it's being set on an object without a lot of setter method boilerplate

Installation

Add this line to your application's Gemfile:

gem 'transformable'

And then execute:

$ bundle

Or install it yourself as:

$ gem install transformable

Usage

Use the clean method on your objects to create a setter method that manipulates inputs:

class User < ActiveRecord::Base
  include Transformable
  clean(:email) {|e| e.downcase}
end

> u = User.new(email: "foo@BAR.com")
> u.email
 => "foo@bar.com"

By default, nil values won't be passed through to the block. Use the skip_nil option if you want them:

class User < ActiveRecord::Base
  include Transformable
  clean(:email, :skip_nil => false) {|e| e || "example@foobar.com"}
end

> u = User.new(email: "email@email.com")
> u.email = nil
> u.email
 => "example@foobar.com"

I use regexes for removing forbidden characters:

class User < ActiveRecord::Base
  include Transformable
  clean(:email) {|e| e.gsub(/\s/, "")} # remove spaces
end

> u = User.new(email: "f o o @ b a r . c o m")
> u.email
 => "foo@bar.com"

Transformable works on pure ruby objects as well as ActiveRecord objects!

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request