Question

我正在尝试在ZF2中实施View Strategy。

就基本设置而言，除了ViewEvent Renderer始终为null之外，一切似乎都正常工作，因此渲染器永远不会被注入到策略中，而TemplateResolver仍然会请求模板并显示以下错误。

PhpRenderer::render: Unable to render template "api/api/get"; resolver could not resolve to a file'

我甚至试图从ZF2复制代码JsonModel和JsonStrategy，但仍然得到相同的结果。的 ViewYamlStrategy.php

public function selectRenderer(ViewEvent $e)
{
    $renderer = $e->getRenderer(); // Always return null
}

module.php

public function getServiceConfig()
{
    return ['factories' => [
        'ViewYamlRenderer' => "Namespace\Mvc\Service\ViewYamlRendererFactory",
        'ViewYamlStrategy' => "Namespace\Mvc\Service\ViewYamlStrategyFactory",
        ],
    ];
}

module.config.php

'view_manager' => [
    'strategies' => [
        'ViewYamlStrategy'
    ],
],

控制器

public function getList()
{
    return new YamlModel($data);
}

ViewYamlStrategy.php

function __construct(ViewYamlRenderer $renderer)
{
    $this->renderer = $renderer;
}
public function attach(EventManagerInterface $events, $priority = 1)
{
    $this->listeners[] = $events->attach(ViewEvent::EVENT_RENDERER, [$this, "selectRenderer"], $priority);
    $this->listeners[] = $events->attach(ViewEvent::EVENT_RESPONSE, [$this, "injectResponse"], $priority);
}

public function selectRenderer(ViewEvent $e)
{
    $renderer = $e->getRenderer();
    if ($this->renderer !== $renderer) {
        return;
    }
}

public function injectResponse(ViewEvent $e)
{
    $renderer = $e->getRenderer(); // Always null

    if ($this->renderer !== $renderer) {
        return;
    }
    $result = $e->getResult();
    $response = $e->getResponse();
    $response->setContent($result);
}

ViewYamlRenderer.php

public function render($nameOrModel, $values = null)
{
    return $nameOrModel->serialize();
}

public function setResolver(\Zend\View\Resolver\ResolverInterface $resolver)
{
    $this->resolver = $resolver;
}

YamlModel.php

protected $captureTo = null;
protected $terminate = true;

public function serialize()
{
    /*Serialize Object and return a string*/
}

感谢

Answer 1

我认为这是由于触发策略/听众的顺序;一旦找到ViewRender，就会暂停事件传播并返回渲染器。

似乎标准PhpRenderStrategy的默认事件优先级为1，其他（JsonStrategy等）似乎触发之前< / em>到此（优先级为100）

尝试更改$priority;也许101

$this->listeners[] = $events->attach( ViewEvent::EVENT_RENDERER, [$this, "selectRenderer"], 101 // <-- change here );

Answer 2

我终于找到了问题。

<强> ViewYamlStrategy.php

/* This should return a renderer */
public function selectRenderer(ViewEvent $e)
{
    // here I was checking the Renderer which was not created yet
    // and instead I should've checked the model
    $model = $e->getModel();
    if (!$model instanceof YamlModel) {
        return;
    }
    return $this->renderer;
}

zf2视图策略，ViewEvent渲染器始终为null

2 个答案: