sheesh19/activerecord-sinatra-characters-488

ActiveRecord basics boilerplate

This is a minimalist implementation of ActiveRecord with one Restaurant model to live-code a demo for @LeWagon students, part of Karr examples, working with Sinatra.

clone the repo
run rake db:create to create your db
run your migrations with rake db:migrate

Now you can play with the Restaurant model:

rake console

Here are some commands you can run in the console:

restaurant = Restaurant.new(name: "La Tour d'Argent", address: "15 Quai de la Tournelle, 75005 Paris")
restaurant.persisted?
# => false
restaurant.id
# => nil
restaurant.save
restaurant.id
# => 1

To launch a Sinatra server just run this and open a web browser at http://localhost:4567:

bundle exec ruby app.rb

Enjoy!

CRUD ACTIVE RECORD RECAP (RESTAURANTS)

READ ALL

Restaurant.all

READ ONE

Restaurant.find(1)
Restaurant.find_by(name: 'The Leaky Cauldron') # returns one

CREATE

hogs_head = Restaurant.new(name: "Hog's Head", address: 'Hogsmeade')
hogs_head.save
Restaurant.create(name: "Hog's Head", address: 'Hogsmeade')

UPDATE

update_restaurant = Restaurant.find(1)
update_restaurant.address = 'London'
update_restaurant.save

DELETE

destroy_restaurant = Restaurant.find(1)
destroy_restaurant.destroy

FILTER

Restaurant.where(address: 'London') # returns multiple

sheesh19 / activerecord-sinatra-characters-488