Devise / cancancan tutorial: seeding the app with data

seeds.rb

r1 = Role.create({name: "Regular", description: "Can read items"})
r2 = Role.create({name: "Seller", description: "Can read and create items. Can update and destroy own items"})
r3 = Role.create({name: "Admin", description: "Can perform any CRUD operation on any resource"})

u1 = User.create({name: "Sally", email: "sally@example.com", password: "aaaaaaaa", password_confirmation: "aaaaaaaa", role_id: r1.id})
u2 = User.create({name: "Sue", email: "sue@example.com", password: "aaaaaaaa", password_confirmation: "aaaaaaaa", role_id: r2.id})
u3 = User.create({name: "Kev", email: "kev@example.com", password: "aaaaaaaa", password_confirmation: "aaaaaaaa", role_id: r2.id})
u4 = User.create({name: "Jack", email: "jack@example.com", password: "aaaaaaaa", password_confirmation: "aaaaaaaa", role_id: r3.id})

i1 = Item.create({name: "Rayban Sunglasses", description: "Stylish shades", price: 99.99, user_id: u2.id})
i2 = Item.create({name: "Gucci watch", description: "Expensive timepiece", price: 199.99, user_id: u2.id})
i3 = Item.create({name: "Henri Lloyd Pullover", description: "Classy knitwear", price: 299.99, user_id: u3.id})
i4 = Item.create({name: "Porsche socks", description: "Cosy footwear", price: 399.99, user_id: u3.id})