Rails Bootcamp [Sesión 03]

Transcript

1. RAILS BOOTCAMP 3 JUNIO 2016
2. ACTIVERECORD
3. Modelos
4. $ rails generate model Person
5. /app/models/person.rb
6. Migraciones
7. /db/migrate
8. $ rake db:migrate
9. Crear modelo de datos de tu app recuerden migrar los nuevos modelos
10. Jugando con la consola de rails recuerden migrar los nuevos modelos
11. $ rails console
12. p = Person.first
13. p.name
14. Person.all
15. Crear asociaciones
16. $ rails generate migration AddReferencesToBook person:references
17. app/models/person.rb class Person < ActiveRecord::Base has_many :books # has_one :book end
18. app/models/book.rb class Book < ActiveRecord::Base belongs_to :person end
19. Crear validaciones
20. app/models/person.rb class Person < ActiveRecord::Base validates :name, presence: true end
21. Callbacks
22. before_save after_save before_create after_create before_validation after_validation
23. app/models/person.rb class Person < ActiveRecord::Base before_save :count_pets def count_pets if self.email.nil? puts "No tiene mail" else puts "Yeih! #{self.email}" end end end