Symfony 4 container array service parameter

Question

In file service.yaml i have:

parameters:
  security.allows.ip:
    - '127.0.0.1'
    - '127.0.0.2'

Or:

parameters:
  security.allows.ip: ['127.0.0.1', '127.0.0.2']

And configuration for DI:

services:
  _defaults:
    autowire: true
    autoconfigure: true
    public: false

And i want to configure service for class:

security.class:
    class: App\Class
    arguments:
      - '%security.allows.ip%'

And finally I have message:

Cannot autowire service "App\Class": argument "$securityConfiguration" of method "__construct()" must have a type-hint or be given a value explicitly.

And constructor definition is:

 public function __construct(array $securityConfiguration)

Could you help me with it? In symfony 2.8 it works, but for this configuration I have this error. Other sevices for type hint string is ok, but not for this class. If I add container interface to construct for this class and getting parameter by ->getParameter('security.allows.ip') it works. Why?

I suggest to edit the title of this post to make it more focused on the problem detail. — AndreyS Scherbakov
– AndreyS Scherbakov, Commented Feb 22, 2018 at 0:30

Cerad · Accepted Answer · 2018-02-21 21:41:07Z

6

In order for autowire to work, the typehint need to match a service id. The problem here is that you have another class into which you are trying to inject your rather poorly named App\Class

class SomeOtherClass {
    public function __construct(App\Class $appClass)

When you created your AppClass service, you gave it an id of security.class. So autowire looks for a service id of App\Class, does not find it and then attempts to create one. And of course it cannot autowire an array.

One way to fix this is by using an alias:

security.class:
    class: App\Class
    arguments:
        - '%security.allows.ip%'

App\Class: '@security.class'

A second (recommended) approach is to do away with the security.class id completely

App\Class:
    arguments:
        - '%security.allows.ip%'

And if you really want to be the cool kid on the block, you can even drop the arguments keyword.

App\Class:
    $securityConfiguration: '%security.allows.ip%'

edited Feb 21, 2018 at 21:41

answered Feb 21, 2018 at 21:34

Cerad

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2 Comments

Rafal Wycislik Over a year ago

This name is only example it is not really named class

Rafal Wycislik Over a year ago

But use an alias fix my problem. Thank you.

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