• Use named constructor even if you have only one http://verraes.net/2014/06/named-constructors-in-php/
• Finals classes by default https://matthiasnoback.nl/2018/09/final-classes-by-default-why/
• Classify yours exceptions http://37steps.com/2700/exception-classification/. For example, throw \RuntimeException (or parent class) for failures caused by external, unpredictable things and throw \LogicException (or parent class) for programming mistakes.
• Avoid setter injection and validate property on initialization to ensure object consistency https://www.brandonsavage.net/avoiding-setter-injection/

• Use autowiring for your services
• Validate your entities
• If you use annotations, compose your entities with traits https://medium.com/@galopintitouan/using-traits-to-compose-your-doctrine-entities-9b516335119b

WIP

• Avoid bidirectionnals associations. Use DQL trick for your complex queries instead https://tideways.com/profiler/blog/5-doctrine-orm-performance-traps-you-should-avoid
• Repositories don't respect ISP. Use Query Function
• Use iterable type on Doctrine's collection methods
• Doctrine doesn't require getter or setter. Don't expose them if you don't need it (Immutables properties for example)
• Use UUID instead of auto incremented ids https://medium.com/@galopintitouan/auto-increment-is-the-devil-using-uuids-in-symfony-and-doctrine-71763721b9a9
• Inject your repositories instead of entity manager https://matthiasnoback.nl/2014/05/inject-a-repository-instead-of-an-entity-manager/
• Use annotations (YAML configuration has been deprecated)
• Avoid composite primary key https://www.doctrine-project.org/projects/doctrine-orm/en/2.6/tutorials/composite-primary-keys.html
• Use fixtures in development

• Final methods will be possible in Doctrine3

• http://talks.nekland.fr/Doctrine/#/ (French slides)
• https://ocramius.github.io/doctrine-best-practices/#/
• https://ocramius.github.io/blog/doctrine-orm-optimization-hydration/
• https://github.com/jupeter/clean-code-php

• Use PHPUnit Mocks instead of Prophecy https://medium.com/@IvanChepurnyi/native-mocking-and-stubbing-in-php-ad11a32596e4
• Isolate your functionals tests thank to a group annotation (@group functional)
• Never mock the class / trait / interface you are testing on its test class. For a trait or interface, use a DummObject which implements the interface or uses the trait
• Don't test your privates methods unless they are complex