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Extensions for ActiveModel to implement multiple types of models
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 Dependencies

Development

~> 1.3
>= 0
= 2.13.0

Runtime

 Project Readme

CleanModel

Gem Version Build Status Coverage Status Code Climate Dependency Status

Extensions for ActiveModel to implement multiple types of models

Installation

Add this line to your application's Gemfile:

gem 'clean_model'

And then execute:

$ bundle

Or install it yourself as:

$ gem install clean_model

Basic models

Class definitions

class Person
  include CleanModel::Base

  attribute :first_name
  attribute :last_name
end

Usage

person = Person.new first_name: 'John', last_name: 'Doe'

person.first_name -> 'John'
person.last_name  -> 'Doe'

person.attributes -> {first_name: 'John', last_name: 'Doe'}

person.assign_attributes first_name: 'Jorge'

person.attributes -> {first_name: 'Jorge', last_name: 'Doe'}

Defaults

class Person
  include CleanModel::Base

  attribute :first_name, default: 'John'
  attribute :last_name
end

person = Person.new
person.first_name -> 'John'
person.last_name  -> nil

Active Model validations

class Person
  include CleanModel::Base

  attribute :first_name
  attribute :last_name

  validates_presence_of :first_name, :last_name
end

person = Person.new
person.valid? -> false

Strong typing

class Engine
  include CleanModel::Base

  attribute :power, class_name: :numeric
  attribute :cylinders, class_name: :integer
  attribute :valves, class_name: 'Integer'
end

engine = Engine.new
engine.power = 130
engine.cylinders = 6.1 -> Raise error CleanModel::InvalidTypeAssignment

Transformations

class Car
  include CleanModel::Base

  attribute :brand
  attribute :model
  attribute :engine, class_name: 'Engine'
  attribute :comfort, transformation: lambda { |v| v.is_a?(String) ? v.split(',').map(&:strip) : v }
end

car = Car.new do |c|
  c.engine = {power: 110, cylinders: 16, valves: 6}
end
car.engine -> <Engine @power=110, @cylinders=16, @valves=6>

car = Car.new do |c|
  c.comfort = 'bluetooth, gps, electric pack'
end
car.comfort -> ['bluetooth', 'gps', 'electric pack']

Collections

class Factory
  include CleanModel::Base

  attribute :cars, collection: 'Car'
end

factory = Factory.new do |f|
  f.cars = [
    {brand: 'Honda', model: 'Civic'},
    {brand: 'Toyota', model: 'Corolla'},
  ]
end

factory.cars -> [<Car @brand=Honda, @model=Civic>, <Car @brand=Toyota, @model=Corolla>]

Models with custom persistence

Definition

class Post
  include CleanModel::Persistent

  attribute :subject
  attribute :content

  private

  def create
    ...
  end

  def update
    ...
  end

  def delete
    ...
  end
end

Usage

Post.create(subject: 'Title', content: 'Some text')
or
post = Post.new subject: 'Title', content: 'Some text'
post.save

post.content = 'Another text'
post.save

post.update_attributes(title: 'Another title')

post.destroy

Remote models (for REST APIs)

Definition

class User
  include CleanModel::Remote

  connection host: 'localhost', port: 9999

  attribute :first_name
  attribute :last_name
  attribute :email

  def self.find(id)
    connection.get "/users/#{id}.json" do |response|
      new JSON.parse(response.body)
    end
  end

  private

  def create
    connection.post! '/users/create.json', wrapped_attributes
  end

  def update
    connection.put! "/users/#{id}.json", wrapped_attributes(except: :id)
  end

  def delete
    connection.delete!("/users/#{id}.json")
  end
end

Usage

User.create first_name: 'John', last_name: 'Doe'

user = User.find(1)

user.update_attributes(first_name: 'Jorge')

user.destroy

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