WhoopsPrettyPageHandlerDelegator leads to undefined index error

[arku31]

Bug Report

Q	A
Version(s)	3.1

Summary

vendor/mezzio/mezzio-swoole/src/ConfigProvider.php has delegator defined as

Mezzio\WhoopsPageHandler' => [
                    WhoopsPrettyPageHandlerDelegator::class,
],

Current behavior

This leads to
Notice: Undefined index: Mezzio\WhoopsPageHandler in vendor/elie29/zend-phpdi-config/src/Config.php on line 137

How to reproduce

Expected behaviour

Whoops should not be tied to the application

[weierophinney]

What DI container are you using, please?

[arku31]

Hi,
I am using
php-di/php-di 6.0

I got it offered via mezzio-skeleton

[weierophinney]

We may need to fix this in the php-di wrapper. It's common to define delegators even for services that are not registered, so that once they are, the delegators are present. This seems to be an issue where the wrapper that populates the php-di container is unhappy that the service does not exist when the delegator is registered.

[arku31]

If someone will struggle as well: There is a workaround for it.
In any ConfigProvider that you're registering in /config/config.php AFTER the \Mezzio\Swoole\ConfigProvider::class, you may overwrite this by providing an array that contains data that will overwrite the default value: in the getDependencies method, add
'delegators' => [ 'Mezzio\WhoopsPageHandler' => new \stdClass()]