Easyadminbundle: ChoiceField and "Array to string conversion"

[axzx]

Describe the bug
easycorp/easyadmin-bundle v3.0.2
I'm using the ChoiceField field as in the description, but I get an error.

To Reproduce
UserCrudController.php:

public function configureFields(string $pageName): iterable
{
    return [
        ChoiceField::new('roles')->setChoices(['ROLE_ADMIN' => 'ROLE_ADMIN']),
    ];
}

Notice: Array to string conversion

(OPTIONAL) Additional context
In my User entity:

/**
 * @ORM\Column(type="json")
 */
private $roles = [];

[lukasluecke]

Can you try ->allowMultipleChoices() on the field? That should set the multiple option, and therefore allow it to handle array values.

[axzx]

@lukasluecke it worked, thanks :)
could this not be done automatically?

[lukasluecke]

It probably could be done in the ChoiceConfigurator - however I'm hesistant to add more metadata-specific logic there until #3389 is somewhat handled 🙈

[javiereguiluz]

Using a ChoiceField for a JSON Doctrine type can be considered an "edge case" (a CodeEditorField or a future JsonField should be used). So, for now, I'm closing this as "fixed" thanks to @lukasluecke solution. Thanks!