Forget "autowire" and just use it

2016-07-18

When to autowire?

If you use autowiring daily, you might came across this thinking process before you place autowired: true to your config:

1) Has this service constructor dependency?

• No => skip
• Yes => go on

2) Is it object?

• No => skip
• Yes => go on

3) Is it unique service type?

• No => add alias for specific name to required service
• Yes => autowire

4) Has the constructor changed during development?

• Start from point 1.

Plus some more logic for edge cases like parameters and factories.

Seems like function... Could this be automated?

You are right! It can be automated.

This is exactly what Symplify/DefaultAutowire bundle does.

Apart handling feature above for you, it will turn this...

# app/config/config.yml
services:
    PriceCalculator:
        autowire: true

    ProductRepository:
        autowire: true

    UserFactory:
        autowire: true

...into this:

# app/config/config.yml
services:
    PriceCalculator: ~

    ProductRepository: ~

    UserFactory: ~

Get It Done in 2 steps

1. Install package

composer require symplify/default-autowire

2. Register bundle

// app/AppKernel.php

final class AppKernel extends Kernel
{
    public function registerBundles(): array
    {
        $bundles = [
            new Symplify\DefaultAutowire\SymplifyDefaultAutowireBundle(),
            // ...
        ];
    }
}

And that's it!

For further use, just check Readme for Symplify/DefaultAutowire.