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KEEPCALM
AND
LEARNFROM
MISTAKES
0101010010 0100100110 0101010010 0101010100
CODE COMMUNICATION
2 developers
Full-stack Web Framework
Dependencies, dependencies, dependencies…
No real unit tests
FAIL
• Even in early stage, iterations can share code
• Code built today should be useful tomorrow
• Modularity helps
class User field :name, type: String field :email, type: String field :gender, type: String embeds_one :profile end
add_column :users, :name, :string add_column :users, :email, :string add_column :users, :gender, :string add_column :users, :profile_id, :reference
SQL
MongoDB
User.find(id) # => Mongoid::Errors::DocumentNotFound
User.find(id) # => ActiveRecord::RecordNotFound
SQL
MongoDB
Microframework + Custom stack
Structure
Validations
MODEL
user = User.new(email: ‘[email protected]’, name: ‘John’)
user.to_h # => { email: ‘[email protected]’, name: ‘John’ }
User.new(user.to_h)
MODEL
Responsible for serializing and deserializing
repo = UserRepository.new(db_config)
repo.put(user)
repo.find_one_by_id(user.id)
REPOSITORY
Responsible for storage and retrieval
user_service = UserService.new(user_repository)
user_service.visit_profile(user_id)
user_service.deactivate(current_user_id)
SERVICE
Business logic using models and repos
MODELS
MODELS REPOSITORIES
MODELS REPOSITORIES
SERVICES
MODELS REPOSITORIES
SERVICES
JSON API MIDDLEWARE
MODELS REPOSITORIES
SERVICES
JSON API MIDDLEWARE
WEB FACADE
MODELS REPOSITORIES
SERVICES
JSON API MIDDLEWARE
WEB FACADE MOBILE APP
Ruby magic
class API api :get, ‘/:user_id’, :user_service, :visit_profile
api :delete, '/me', :user_service, :deactivate
... end
time
progress
DIRTY CODING
time
progress
CODE REFACTORING
While refactoring, nothing is produced
Startup programmers need to think of the WHY
Think of ROI of current task
OK when we were landing page size
We had Text Files and our heads
We got lost in small tasks
Then we had Pivotal Tracker-style tools
Still got lost in small tasks
We tried Kanban
Yeah, got lost in small tasks
We had Scrum meetings
VISION
VISION
BIG HAIRY AUDACIOUS GOAL (BHAG)
VISION
BIG HAIRY AUDACIOUS GOAL (BHAG)
KPI KPI KPI KPI
VISION
BIG HAIRY AUDACIOUS GOAL (BHAG)
KPI KPI KPI KPI
WEB MOBILE APP B2B API
VISION
BIG HAIRY AUDACIOUS GOAL (BHAG)
KPI KPI KPI KPI
WEB MOBILE APP B2B API
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
VISION
BIG HAIRY AUDACIOUS GOAL (BHAG)
KPI KPI KPI KPI
WEB MOBILE APP B2B API
VIEWS MODEL DBANDROID
CODEIOS
CODESALES PR
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
VISION
BIG HAIRY AUDACIOUS GOAL (BHAG)
KPI KPI KPI KPI
WEB MOBILE APP B2B API
VIEWS MODEL DBANDROID
CODEIOS
CODESALES PR
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
FUNCTIONALITY
Jarg
on
The
rea
l shi
t
Think of what you’re actually doing
I’m coding
I’m coding this method to
let users log in with Facebook,
which affects the web product
to improve login conversion,
getting closer to the goal of…
in order to build a world where…
Jargon
Feature
Product
KPI
Goal
Vision
