Preparation notes for a talk

Kill-fat-model.md

[Talk] kill fat models

intro

• after a time you wake up with a fat app
• number of features increase, velocity decrease.
• asymptotyc scalability : increase teams => increase need to sync

Conventions without comprehension

start fast / small and blind

• data driven architecture
• MVC as the response to everything
• following conventions but break some principles not on purpose.

grow

• keep everything related to a data in the model
• more/all function rely on every models
• no unit test anymore

where is the line saying stop growing these models ?

• there is no line
• can we go to a safe area again ?

refactoring with a scalpel

creating a new type of object ?

• MVC is not the enemy

/lib a teritory to conquier

• cut brick by brick

think the gem way

• extract a full building

measure your refactor by testing

better design => faster unit test

• zeus, ... , commands and friends are keeping you blind.
• keep test_helper light

proper integration tests

• here you test your stack and cross object behaviors

QA by acceptance tests

• what is testable
• keep away from implementation dependency
• where frontend guys write testable GUI