Perpetuity ActiveModel wrapper

article_mapper.rb

require 'article'
require 'user'

class ArticleMapper < Perpetuity::Mapper
  include Perpetuity::ActiveModelWrapper

  attribute :title, String
  attribute :body, String
  attribute :author, User
end

articles_controller.rb

class ArticlesController < ApplicationController
  def edit
    @article = ArticleMapper.find(params[:id])
    @article_mapper = ArticleMapper.new(article)
  end
end

edit.html.slim

=form_for @article_mapper do |f|
  p.field=f.text_field :title
  p.field=f.text_area :body