Ruby on Rails with Active Record
•Download as PPTX, PDF•
0 likes•214 views
Javaday istanbul konferasi Online Full Stack Developer Program icin yaptigim sunum
Recommended
Recommended
More Related Content
What's hot
What's hot (20)
Similar to Ruby on Rails with Active Record
Similar to Ruby on Rails with Active Record (20)
Recently uploaded
Recently uploaded (20)
Ruby on Rails with Active Record
- 1. Ruby on Rails With Active Record Burak İnce - 15.04.2017
- 2. Ruby & RoR What is Ruby? What is Ruby on Rails? What is Rake? https://martinfowler.com/articles/rake.html Installation? https://gorails.com/setup/
- 3. How Rails Interacting With Database? Scaffolding Being able to quickly generate code to view, delete and update resources. Essentially a code- generator for entities. Migrations Ruby code that lets you modify the database. You can create migrations and apply them to the database, which takes the database to a different state. You can then roll back migrations, allowing them to return to a previous state. Active Record Interaction with the database data. CRUD
- 4. Scaffolding
- 5. Migrations Applying scaffolding to DB http://guides.rubyonrails.org/v4.2/active_record_migrations.html
- 6. Active Record (Design Pattern) An object that wraps a row in a database table or view, encapsulates the database access, and adds domain logic on that data. https://www.martinfowler.com/eaaCatalog/activeRecord.html An object carries both data and behavior. Much of this data is persistent and needs to be stored in a database. Active Record uses the most obvious approach, putting data access logic in the domain object. This way all people know how to read and write their data to and from the database.
- 7. Rails Console: rails c
- 9. CRUD - Retrieve / Read
- 10. CRUD - Retrieve / Read - where, find_by, find_by!
- 11. CRUD - Update
- 12. CRUD - Delete
- 13. DB Seed db/seeds.rb lets you seeds the database Use create! - otherwise it will fail silently
- 14. Rails Associations / Relations Rails supports six types of associations: belongs_to has_one has_many has_many :through has_one :through has_and_belongs_to_many
- 18. The has_many :through Association
- 19. The has_one :through Association
- 21. Questions?
Editor's Notes
- ruby -v rails -v rake -T
- rails new OnlineBranch rails g scaffold customer name surname birth_date:integer rake db:migrate rails g modal address city district neightborhood
- rails generate migration add_email_to_customers email:string rake db:rollback
- rails c Customer.column_names Customer.primary_key
- c1 = Customer.new c1.name = "Burak" c1.surname = "Ince" c1.birth_date = 21081987 C1.save c2 = Customer.create(name: "Burak", surname: "Ince", birth_date: 21081987)
- Customer.all.order(name: :desc).to_a Customer.first Customer.all.first Customer.all[0] Customer.take Customer.pluck(:surname)
- Customer.where(name: "Burak") Customer.where(name: "Burak").first Customer.where(name: "Burak")[0] Customer.find_by(name: "Deneme") Customer.find_by!(name: "Deneme")
- Customer.find_by(name: "Burak").update(name: "Murat")
- Customer.find_by(name: "Murat").destroy c1 = Customer.find_by(name: "Ince") Customer.delete(c1.id) Customer.count
- Customer.destroy_all Customer.create! [ { name: "User1Name", surname: "User1Surname", birth_date: 10101970 }, { name: "User2Name", surname: "User2Surname", birth_date: 10101971 }, { name: "User3Name", surname: "User3Surname", birth_date: 10101972 }, { name: "User4Name", surname: "User4Surname", birth_date: 10101973 }, { name: "User5Name", surname: "User5Surname", birth_date: 10101974 }, { name: "User6Name", surname: "User6Surname", birth_date: 10101975 }, { name: "User7Name", surname: "User7Surname", birth_date: 10101976 } ] rake db:seed