通过服务将Symfony EntityManager注入表单类型

Question

我需要修改表单(标签和类)中的某些字段,具体取决于实体是否是最新发布的版本.所以我需要能够将实体管理器注入到我的formType中,以便在事件监听器中我可以将当​​前版本与实体的已发布版本进行比较.但我甚entityManager至无法进入__construct()开始.也许有更好的方法来实现我的大目标(例如修改树枝模板中的表单),但我需要了解如何执行此基本依赖注入.

我认为,如果我在我的服务中声明它(如文档描述的基本服务容器和特定的构造函数注入方法),它将作为我的构造中的参数.但是当我这样做时,我得到错误:

Catchable fatal error: Argument 1 passed to Gutensite\CmsBundle\Form\Type\ViewType::__construct() must be an instance of Doctrine\ORM\EntityManager, none given, called in /var/www/core/cms/src/Gutensite/ArticleBundle/Controller/AdminEditController.php on line 222 and defined in /var/www/core/cms/src/Gutensite/CmsBundle/Form/Type/ViewType.php on line 15

以下是我的代码中的代码段:

Gutensite/CmsBundle /资源/配置/ service.yml

gutensite_cms.form.type.view:
    class: Gutensite\CmsBundle\Form\Type\ViewType
    arguments: [ "@doctrine.orm.entity_manager" ]

Gutensite/CmsBundle /表/类型/ ViewType.php

namespace Gutensite\CmsBundle\Form\Type;
use Doctrine\ORM\EntityManager;
use Symfony\Component\Form\AbstractType;

class ViewType extends AbstractType
{

    private $em;

    public function __construct(EntityManager $entityManager) {
        $this->em = $entityManager;
    }
}

Gutensite/ArticleBundle /控制器/ AdminEditController.php

// Get the View Entity
$em = $this->getDoctrine()->getManager();
$viewRepo = $em->getRepository("GutensiteCmsBundle:View\View");
$view = $viewRepo->find($request->query->get('id'));

// Create the generic form for editing any View, using the view entity constructed
$form = $this->createForm(new ViewType(), $view);

注意:

我使用两个实体管理器,所以我的config.yml看起来像这样.我不知道这对我注射的是否有任何影响,即我可以注射@doctrine.orm.entity_manager还是我应该注射@doctrine.orm.default_entity_manager什么？我尝试了各种各样的选择而没有工作.

# Doctrine Configuration
doctrine:
    dbal:
        default_connection: cms
        connections:
            cms:
                driver:   "%db.cms.driver%"
                host:     "%db.cms.host%"
                port:     "%db.cms.port%"
                dbname:   "%db.cms.name%"
                user:     "%db.cms.user%"
                password: "%db.cms.password%"
                charset:  "%db.cms.charset%"
            billing:
                driver:   "%db.billing.driver%"
                host:     "%db.billing.host%"
                port:     "%db.billing.port%"
                dbname:   "%db.billing.name%"
                user:     "%db.billing.user%"
                password: "%db.billing.password%"
                charset:  "%db.billing.charset%"
    orm:
        default_entity_manager: cms
        entity_managers:
            cms:
                connection: cms
                mappings:
                    GutensiteCmsBundle: ~
                    GutensiteArticleBundle: ~
            billing:
                connection: billing
                mappings:
                    GutensiteBillingBundle: ~
        auto_generate_proxy_classes: "%kernel.debug%"

参考已经:

• Symfony 2 EntityManager注入服务
• Symfony2在FormType中注入EntityMananager

解:

我不需要将ViewType定义为服务,我只需要在new viewType($em)创建新的ViewType表单时传入实体管理器:

Gutensite/ArticleBundle /控制器/ AdminEditController.php

// Get the View Entity
$em = $this->getDoctrine()->getManager();
$viewRepo = $em->getRepository("GutensiteCmsBundle:View\View");
$view = $viewRepo->find($request->query->get('id'));

// Create the generic form for editing any View, using the view entity constructed
$form = $this->createForm(new ViewType($em), $view);

Answer 1

你得到了这个错误,因为你正在创建这样的表单类型:

$form = $this->createForm(new ViewType(), $view);

您创建ViewType没有任何参数的新对象,需要调用它EntityManager.您可以简单地从控制器传递实体管理器,如下所示:

$em = $this->get('doctrine.orm.entity_manager'); // or doctrine.orm.billing_entity_manager
$form = $this->createForm(new ViewType($em), $view);

在这种情况下,您甚至不需要将此表单类型定义为服务.

使用doctrine.orm.entity_manager或doctrine.orm.billing_entity_manager取决于你需要在里面取得什么ViewType- (来自女巫数据库).

更新:

将表单类型定义为服务.

将这两项服务添加到您的配置(services.yml):

services
    gutensite_cms.form.view:
        factory_method: createNamed
        factory_service: form.factory
        class: Symfony\Component\Form\Form
        arguments:
            - view_form                        # name of the form
            - view                             # alias of the form type
            - null                             # data to bind, this is where your entity could go if you have that defined as a service
            - { validation_groups: [Default] } # validation groups

    gutensite_cms.form.type.view:
        class: Gutensite\CmsBundle\Form\Type\ViewType
        arguments: [ "@doctrine.orm.entity_manager" ]
        tags:
            - { name: form.type, alias: view }

然后你可以通过在你的控制器(或其他任何东西container)中执行它来创建新的表单,而无需手动传递任何参数(它们将自动注入):

public function newAction()
{
    $view = ...;
    $form = $this->get( 'gutensite_cms.form.view' );

    // set initial form data if needed
    $form->setData( $view );
}