1.
THE END
OF RAILS?
@APOTONICK

2.
THE ILLUSION
OF STABLE APIS
@APOTONICK

3.
“Most Rails developers do not write
object-oriented Ruby code.
They write MVC-oriented Ruby code by
putting models and controllers in the
expected locations.
It takes 2-3 years before developers
realize: “Rails is just Ruby.”
-- Mike Perham

4.
RAILS’
OBSESSION
WITH “MVC”

5.
class User < ActiveRecord::Base
validates :name, length: 20
validates :email, format: email
validates :age, numericality: true

6.
class User < ActiveRecord::Base
validates :name, length: 20
validates :email, format: email
validates :age, numericality: true
User.create(
name: “RISE!”,
email: “rise@”
age: 21
)

7.
class User < ActiveRecord::Base
validates :name, length: 20
validates :email, format: email
validates :age, numericality: true

8.
class User < ActiveRecord::Base
validates :name, length: 20
validates :email, format: email
validates :age, numericality: true

9.
class User < ActiveRecord::Base
validates :name, length: 20
validates :email, format: email
validates :age, numericality: true
User.create(
name: “RISE! This user is by ADMIN!”,
email: “rise@”
age: 21
)

10.
class User < ActiveRecord::Base
validates :name, length: 20
validates :email, format: email
validates :age, numericality: true
User.create(
name: “RISE! This user is by ADMIN!”,
email: “rise@”
age: 21
)

11.
class User < ActiveRecord::Base
validates :name, length: 20,
unless: → { creator_is_admin? }
validates :email, format: email
validates :age, numericality: true
User.create(
name: “RISE! This user is by ADMIN!”,
email: “rise@”
age: 21
)

12.
class User

13.
defmodule User do
use Ecto.Schema
import Ecto.Changeset
schema "users" do
field :name
field :email
field :age, :integer
end
def changeset(user, params :empty) do
user
|> cast(params, ~w(name email), ~w(age))
|> validate_format(:email, ~r/@/)
|> validate_inclusion(:age, 18..100)
|> unique_constraint(:email)
end
end

14.
defmodule User do
use Ecto.Schema
import Ecto.Changeset
schema "users" do
field :name
field :email
field :age, :integer
end
def changeset(user, params :empty) do
user
|> cast(params, ~w(name email), ~w(age))
|> validate_format(:email, ~r/@/)
|> validate_inclusion(:age, 18..100)
|> unique_constraint(:email)
end
end

15.
defmodule User do
use Ecto.Schema
import Ecto.Changeset
schema "users" do
field :name
field :email
field :age, :integer
end
def changeset(user, params :empty) do
user
|> cast(params, ~w(name email), ~w(age))
|> validate_format(:email, ~r/@/)
|> validate_inclusion(:age, 18..100)
|> unique_constraint(:email)
end
end

16.
class User

17.
User
User.Admin

18.
class User::Create < Trailblazer::Operation
model User
contract do
property :name
property :email
property :age, type: Integer
validates :email, format: email
validates :age, inclusion: 1..200
end
def process(params)
validate(params) do
contract.save
end
end
end

19.
class User::Create < Trailblazer::Operation
model User
contract do
property :name
property :email
property :age, type: Integer
validates :email, format: email
validates :age, inclusion: 1..200
end
def process(params)
validate(params) do
contract.save
end
end
end

20.
class User::Create < Trailblazer::Operation
model User
contract do
property :name
property :email
property :age, type: Integer
validates :email, format: email
validates :age, inclusion: 1..200
end
def process(params)
validate(params) do
contract.save
end
end
end

21.
class User

22.
User::Create
User::Create::Admin

23.
APIs
MUST
CHANGE!

24.
APIs
MUST
CHANGE!

25.
APIs
MUST
CHANGE!INNOVATION ==

26.
@APOTONICK