Simple symfony refactor - from standard MVC to (lazy) CQRS && DDD - workshop

Info

This is a workshop/learning material!

Req:

• PHP 8.1
• sqlite3
• composer 2
• git
• symfony cli

or with Docker

Update schema

• php bin/console doctrine:schema:create
• php bin/console doctrine:schema:update -f or
• php doctrine:migrations:execute

How to run

• composer install
• do steps from update schema
• symfony server:start

If using docker:

• docker exec PHP_CONTAINER_NAME_HERE -it bash
• composer install
• do steps from update schema
• chown -r 1000:1000 var/data.db
• chmod 776 var/data.db

Simplified business logic

/tool /tool/1/validate-insurance /insurance

If tool have "big" in name it requires at least one Insurance of "OC" type If else then we treat tool as cheap and lack of insurance is not a problem

About the code:

A simple example of refactoring. Here we aim to demonstrate simple way of slowly moving code from controller/views to more standalone units (in this case, messages).

Entities and services are of course simplified. Code created by make:crud is here to be treated as "legacy" - something we want to slowly migrate from. We're moving away specific method - validateInsuranceStatus from ToolController.

Of course at this stage transition to DDD or CQRS is not fully done, we're still missing important parts:

• DTO and more interfaces to better secure domain layer
• Proper exception handling inside Application layer
• Entities should be in domain, but it would create some mess without additional steps
• Finally, controllers and Forms should be moved to new "UI" layer

Others

• Running pslam: vendor/bin/psalm src
• Running easy codding standards: vendor/bin/ecs check "src"