!tagged service not working

I have a DataProvider with constructor like this.

public function __construct(EntityManagerInterface $manager, iterable $extension)

registered as service

  pablo.data_provider.project_data_provider:
    class: 'PabloBundle\DataProvider\ProjectDataProvider'
    arguments:
      - '@doctrine.orm.entity_manager'
      - !tagged 'api_platform.doctrine.orm.query_extension.item'
    tags:
      - { name: 'api_platform.collection_data_provider', priority: 1 }
      - { name: 'api_platform.item_data_provider', priority: 2 }

but I always get this error

Cannot autowire service “PabloBundle\DataProvider\ProjectDataProvider”: argument “$extension” of method “__construct()” is type-hinted “iterable”, you should configure its value explicitly.

I just followed the docs written here -> https://api-platform.com/docs/core/data-providers#injecting-extensions-pagination-filter-eagerloading-etc

[flaushi]

Solved it on my own, but learned a lot during this, see https://stackoverflow.com/a/56655789/5330805

Viele Grüße, Olli Demetz

Von meinem iPhone gesendet

Am 18.06.2019 um 19:06 schrieb Teoh Han Hui [e-mail]:

@flaushi:

But my constructor is called twice!

You should open an issue on Symfony, perhaps? But I suspect you may be doing something wrong somewhere. Maybe try the #support channel on Symfony Slack.

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[MAbohassan]

When you define your service like this

report_helper:
        class: App\Service\ReportHelper
        public: true
        arguments: [!tagged app.reportplaceholder]

you are creating a new service which id is report_helper, Try to debug the container

php bin/console debug:container

you will find your service but with report_helper id, so unless you tried to override your controller definition in service.yaml and pass it the correct service like this

    App\Controller\DefaultController:
        tags: [controller.service_arguments]
        bind:
            $placeholders: '@report_helper'

It won’t work as the service container wouldn’t be able to detect what do you mean by iterable, because it’s trying to using the service which he autowired automatically.

So the solution is what @flaushi says you can use alias to be like this

report_helper:
        alias: App\Service\ReportHelper
        public: true
        arguments: [!tagged app.reportplaceholder]

Or you can use alias directly by using it as service id like this

App\Service\ReportHelper:
        public: true
        arguments: [!tagged app.reportplaceholder]