blocks|key|405644|text|这没有任何意义，因为路由与特定的操作相匹配。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|405645|你不能路由到一个构造函数，那么你怎么能在那里获得路由参数呢？|405646|如果你能告诉我你想做什么，我可以建议一个更好的方法。|405647|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

That would not make any sense as the route is matched to a particular action. 

You can't route to a constructor, therefore how could you get route parameters there?

If you give an idea of what you are trying to do then I could suggest a better/nicer way to do it

blocks|key|1445517|text|通常，您会编写一个方法来代理您需要的任何值，然后调用该方法，调用$this->getEntity()的成本只比调用$this->entity的成本高一点，据我所知，这就是我们声明的目标|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1445518|class+RestController+
{
++++protected+$entity;

++++public+function+getEntity()
++++{
++++++++if+(!$this->entity)+{
++++++++++++$this->entity+=+$this->params()->fromRoute('entity');
++++++++}
++++++++return+$this->entity;
++++}
}|code-block|syntax|javascript|1445519|如果您确实希望预先填充entity属性，最简单的方法是使用初始化器，并将代码从__construct移动到init()。让您的控制器实现\Zend\Stdlib\InitializableInterface|1445520|use+Zend\Stdlib\InitializableInterface;

class+RestController+extends+AbstractRestfulController+implements+InitializableInterface
{
++++protected+$entity;

++++public+function+init()+{
++++++++$this->entity+=+$this->params()->fromRoute('entity');
++++}
}|1445521|将初始化器添加到模块引导程序中的控制器加载器|1445522|use+Zend\Stdlib\InitializableInterface;

class+Module
{
++++public+function+onBootstrap(MvcEvent+$e)

++++++++$sm+=+$e->getApplication()->getServiceManager();

++++++++$controllers+=+$sm->get('ControllerLoader');++++++++++++

++++++++$controllers->addInitializer(function($controller,+$cl)+{
++++++++++++if+($controller+instanceof+InitializableInterface)+{
++++++++++++++++$controller->init();
++++++++++++}
++++++++},+false);+//+false+tells+the+loader+to+run+this+initializer+after+all+others
++++}
}+|1445523|entityMap^0|W|I|1L|D|0|0|13|B|1H|6|1W|Z|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|18|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|19|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|T|$]]

Normally you'd write a method to proxy to whatever value you need, and just call that method, it's only a little more expensive to call <code>$this-&gt;getEntity()</code> than it is to call <code>$this-&gt;entity</code>, which, as far as I can tell is the stated aim



<pre><code>class RestController 
{
 protected $entity;

 public function getEntity()
 {
 if (!$this-&gt;entity) {
 $this-&gt;entity = $this-&gt;params()-&gt;fromRoute('entity');
 }
 return $this-&gt;entity;
 }
}
</code></pre>

If you really do want to pre-populate the entity property, the simplest method is to use an initializer, and move the code from your <code>__construct</code>or to <code>init()</code>. Have your controller implement <code>\Zend\Stdlib\InitializableInterface</code>

<pre><code>use Zend\Stdlib\InitializableInterface;

class RestController extends AbstractRestfulController implements InitializableInterface
{
 protected $entity;

 public function init() {
 $this-&gt;entity = $this-&gt;params()-&gt;fromRoute('entity');
 }
}
</code></pre>

Add an initializer to the controller loader in your module boostrap

<pre><code>use Zend\Stdlib\InitializableInterface;

class Module
{
 public function onBootstrap(MvcEvent $e)

 $sm = $e-&gt;getApplication()-&gt;getServiceManager();

 $controllers = $sm-&gt;get('ControllerLoader'); 

 $controllers-&gt;addInitializer(function($controller, $cl) {
 if ($controller instanceof InitializableInterface) {
 $controller-&gt;init();
 }
 }, false); // false tells the loader to run this initializer after all others
 }
} 
</code></pre>

In my <code>RestController</code> which extends <code>AbstractRestfulController</code>, I can get the route params in the implemented functions such as...
<pre><code>public function create($data)
{
 $entity = $this-&gt;params()-&gt;fromRoute('entity');
}
</code></pre>
... but when I do the same in the constructor like this
<pre><code>public function __construct()
{
 $entity = $this-&gt;params()-&gt;fromRoute('entity');
}
</code></pre>
I get <code>Call to a member function getParam() on a non-object</code>.
Why is that? How can I get the route parameters in the constructor?
<hr />
<h3>What I am trying to do</h3>
Since I'm trying to create a generic controller, there is a part of the restful route that is shared for all actions (resp. verbs). The entity for which the request is made. I'd like to store this in a class parameter for convenience.

Get route params in RESTful controller

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在我的扩展AbstractRestfulController的RestController中，我可以获得实现函数中的路由参数，例如...public function create($data){    $entity = $this->params()->fromRoute('entity');}..。但是当我像这样...

问在RESTful控制器中获取路由参数
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