服务“ admin.category”依赖于不存在的服务“ sonata.admin.manager.orm”

Question

要在Symfony 3中设置Sonata管理员，请按照确切的说明进行操作： https://symfony.com/doc/3.x/bundles/SonataAdminBundle/getting_started/creating_an_admin.html

在第3步中，我输入了如下所述的确切配置： https://symfony.com/doc/3.x/bundles/SonataAdminBundle/getting_started/creating_an_admin.html#step-3-register-the-admin-class

services:
    # ...
    admin.category:
        class: App\Admin\CategoryAdmin
        arguments: [~, App\Entity\Category, ~]
        tags:
            - { name: sonata.admin, manager_type: orm, label: Category }

但是现在我收到以下错误：

The service "admin.category" has a dependency on a non-existent service "sonata.admin.manager.orm".  

Answer 1

运行：

composer require sonata-project/doctrine-orm-admin-bundle