psr/event-dispatcher is incompatible with symfony 4

[pinoniq]

It is currently impossible to use the bundle provided in v2 with symfony. However this one is installed by default.

This because of a dependency on Psr\EventDispatcher\EventDispatcherInterface

The error is:

 Cannot autowire service "Jose\Bundle\JoseFramework\Services\HeaderCheckerManagerFactory": argument "$eventDispatcher" of method "__construct()" references interface "Psr\EventDispatcher\EventDispatcherInterface" but no such service exists. You should   
  maybe alias this interface to one of these existing services: "debug.event_dispatcher", "debug.event_dispatcher.inner".             

[Spomky]

It is compatible, but as spotted out an alias have to be created:
Be sure that

• psr/event-dispatcher is installed (should be with v2.0.5+)
• symfony/event-dispatcher is installed (you may require it depending on your SF app).

Then create the following alias in services.yaml:

services:
    Psr\EventDispatcher\EventDispatcherInterface:
        alias: 'event_dispatcher'

[Spomky]

Closing as answered.
Feel free to re-open this issue in needed.

[eman1986]

can this be in the documentation? I stumbled on this issue as well and this solved my problem.

[Spomky]

Hi @eman1986,

Indeed I will try to automatically create the alias from the bundle if missing.
This way you don't need to modify any config file or read specific notices from the doc.

[Spomky]

Fixed in v2.1.0

[github-actions]

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