无法在 symfony 中加载类型 - Could not load type in symfony

我正在使用FOSOAuthServerBundle和Symfony，并且出现错误以下错误：

Could not load type "travel_oauth_server_auth"
500 Internal Server Error - Exception

这是我service.xml文件，因为我是Symfony的新手，所以我不知道为什么会出现此错误。

<?xml version="1.0" encoding="UTF-8" ?>
<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
    <services>
        <service id="travel_oauth_server.authorize.form_type" class="travel'HomeBundle'Form'Type'AuthorizeFormType">
        </service>
        <service id="travel_oauth_server.authorize.form" factory-method="createNamed" factory-service="form.factory" class="Symfony'Component'Form'Form">
            <argument type="service" id="travel_oauth_server.authorize.form_type" />
            <argument>%travel_oauth_server_auth%</argument>
        </service>
        <service id="travel_oauth_server.authorize.form_handler" class="travel'HomeBundle'Form'Handler'AuthorizeFormHandler" scope="request">
            <argument type="service" id="travel_oauth_server.authorize.form" />
            <argument type="service" id="request" />
            <argument type="service" id="security.context" />
            <argument type="service" id="fos_oauth_server.server" />
        </service>
     </services>
</container>

这是我AuthorizeFormType创建的表单：

<?php
namespace Travel'HomeBundle'Form'Type;
use Symfony'Component'Form'FormBuilderInterface;  
use Symfony'Component'Form'AbstractType;
class AuthorizeFormType extends AbstractType  
{  
    public function buildForm(FormBuilderInterface $builder, array $options)  
    {  
        $builder->add('allowAccess', 'checkbox', array(  
            'label' => 'Allow access',  
        ));  
    }  
    public function getDefaultOptions(array $options)  
    {  
        return array('data_class' => 'Travel'HomeBundle'Form'Model'Authorize');  
    }  
    public function getName()  
    {  
        return 'travel_oauth_server_authorize';  
    } 
}

根据可能是重复的参考问题更新配置文件，但我仍然收到相同的错误

parameters:
    travel_oauth_server_auth.class: Travel'HomeBundle'Form'Type'AuthorizeFormType
services:
    travel_oauth_server_auth:
           class: %travel_oauth_server_auth%

老实说，我认为您需要做的就是添加

<service id="travel_oauth_server_auth" class="%travel_oauth_server_auth.class%" scope="request">
       ...
</service>

对于您的 XML 并摆脱 YAML 文件中的服务定义，我还看到了 2 种类型的命名空间根 travel vs Travel。您可能仍需要标记该服务，请参阅 http://symfony.com/doc/current/book/forms.html#defining-your-forms-as-services

parameters:
  travel_oauth_server_auth.class: Travel'HomeBundle'Form'Type'AuthorizeFormType
services:
  travel_oauth_server_auth:
    class: %travel_oauth_server_auth%

一开始就不正确，如您所愿

parameters:
  travel_oauth_server_auth.class: "Travel'HomeBundle'Form'Type'AuthorizeFormType"
services:
  travel_oauth_server_auth:
    class: %travel_oauth_server_auth.class%

您收到的错误

ParameterNotFoundException: The service "travel_oauth_server.authorize.form" has a dependency on a non-existent parameter "travel_oauth_server_auth" :(

是因为

<service id="travel_oauth_server.authorize.form" factory-method="createNamed" factory-service="form.factory" class="Symfony'Component'Form'Form">
        <argument type="service" id="travel_oauth_server.authorize.form_type" />
        <argument>%travel_oauth_server_auth%</argument>
 </service>

这里没有找到第二个传递的参数，它真的很难告诉你：-）（与任何其他"框架"相比）。

像这样传递参数：

<argument>%travel_oauth_server_auth%</argument>

您可以在 Symfony2 官方文档中找到更多详细信息