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