ZF2：我如何实现自定义过滤器？ [英] ZF2: How do I implement a custom filter?
问题描述
不幸的是，我试图实现一个定制版本的Zend \ Filter \ File \ Rename过滤器，在这里，我总结了我所做的：
$ b $ 1）在我的模块名为图书馆，创建文件
src\Library\Filter\File\Rename.php
命名空间Library\Filter\File ;
使用Traversable;
使用Zend\Filter;
使用Zend\Filter\Exception;
使用Zend\Stdlib\ArrayUtils;
$ b $ class重命名扩展Filter \AbstractFilter {
static $ uploadDir ='/ srv / default / htdocs / public / uploads /';
public function filter（$ value）{
do {
$ newname = md5（uniqid（time（）））;
} while（file_exists（self :: uploadDir。$ newname）;
if（rename（$ value，self :: uploadDir。$ newname）！== true）
抛出新的Exception \RuntimeException（sprintf（File'％s'无法重命名，处理文件时发生错误），$ value））;
return self :: uploadDir。$ newname;
}
}
正如您所看到的，非常简单。这里是模块配置：
module.config.php
< / p> ; $ php
return array（
'controllers'=> array（
// Invokables不支持依赖关系）$ b $'invokables'=> array（
'myFileRename'=>'Library \Filter \File \Rename'，
），
））;
虽然表格是：
[...]
public函数getInputFilterSpecification（）{
返回数组（
'file'=> array（
'required'=> false，
'filters'=> array（
// Custom Renamer
array（'name'=>'myFileRename'） ，
），
）
）;
}
}
？>
但是这不起作用，因为我总是收到一个异常：
致命错误：未捕获的异常'Zend\ServiceManager\Exception\ServiceNotFoundException'带有消息'Zend\ServiceManager\ServiceManager :: get无法获取或者在/srv/default/vendor/ZF2/library/Zend/ServiceManager/ServiceManager.php:420
堆栈跟踪：
＃0 / srv / default / vendor / ZF2中创建一个myFileRename实例。 Zend / ServiceManager / ServiceManager-> get（'myfilerename'，true）
＃1 / srv / default / vendor / ZF2 / library / Zend / Filter / FilterChain.php（179）：Zend\ServiceManager\AbstractPluginManager-> get（'myfilerename'，NULL）
＃2 / srv / default / vendor / ZF2 / library / Zend / InputFilter / Factory。 php（263）：Zend\Filter\FilterChain-> attachByName（'myfilerename'，Array）
＃3 /srv/default/vendor/ZF2/library/Zend/InputFilter/Factory.ph p（171）：Zend\InputFilter\Factory-> populateFilters（Object（Zend\Filter\FilterChain），Array）
＃4 / srv / default / vendor / ZF2 / library / Zend / InputFilter /Factory.php(237):Zend\InputFilter\Factory-> createInput（Array）
＃5 /srv/default/vendor/ZF2/library/Zend/Form/Form.php(672）in /srv/default/vendor/ZF2/library/Zend/ServiceManager/ServiceManager.php on line 420
不幸的是，我发现整个互联网上没有任何文章能够帮助我，而且即使在过滤器作为工厂时，我仍然得到这个错误：/我该怎么办？
你加载过滤器就好像它是一个控制器（因此，在你的模块配置控制器键）。过滤器有一个插件管理器，但是对于这个过滤器你不需要插件管理器。过滤器插件管理器中也没有链接MVC配置。
最简单的方法是自己实例化过滤器。它应该是这样的工作：
使用Library \Filter\File\Rename作为RenameFilter;
$ b $ public function getInputFilterSpecification（）
{
return array（$ b $'file'=> array（
'required'=> false，
'filters'=>数组（
new RenameFilter，
），
）
）;
}
I've been working with Zend Framework 2 for a few weeks now, and, even though the documentation online is pretty incomplete, I managed to build up a first draft of my website.
Unfortunately, I got stuck while trying to implement a custom version of the Zend\Filter\File\Rename filter; here I sum up what I've done:
1) In my module called 'Library', created the file
src\Library\Filter\File\Rename.php
namespace Library\Filter\File;
use Traversable;
use Zend\Filter;
use Zend\Filter\Exception;
use Zend\Stdlib\ArrayUtils;
class Rename extends Filter\AbstractFilter {
static $uploadDir = '/srv/default/htdocs/public/uploads/';
public function filter($value) {
do {
$newname = md5(uniqid(time()));
} while(file_exists(self::uploadDir . $newname);
if (rename($value, self::uploadDir . $newname) !== true)
throw new Exception\RuntimeException(sprintf("File '%s' could not be renamed. An error occurred while processing the file.", $value));
return self::uploadDir . $newname;
}
}
As you can see, is pretty simple. Here's the module config:
module.config.php
<?php
return array(
'controllers' => array(
// Invokables don't support dependencies
'invokables' => array(
'myFileRename' => 'Library\Filter\File\Rename',
),
));
While the form is:
[...]
public function getInputFilterSpecification() {
return array(
'file' => array(
'required' => false,
'filters' => array(
// Custom Renamer
array('name' => 'myFileRename'),
),
)
);
}
}
?>
But this is not working, as I always get an exception:
Fatal error: Uncaught exception 'Zend\ServiceManager\Exception\ServiceNotFoundException' with message 'Zend\ServiceManager\ServiceManager::get was unable to fetch or create an instance for myFileRename' in /srv/default/vendor/ZF2/library/Zend/ServiceManager/ServiceManager.php:420
Stack trace:
#0 /srv/default/vendor/ZF2/library/Zend/ServiceManager/AbstractPluginManager.php(108): Zend\ServiceManager\ServiceManager->get('myfilerename', true)
#1 /srv/default/vendor/ZF2/library/Zend/Filter/FilterChain.php(179): Zend\ServiceManager\AbstractPluginManager->get('myfilerename', NULL)
#2 /srv/default/vendor/ZF2/library/Zend/InputFilter/Factory.php(263): Zend\Filter\FilterChain->attachByName('myfilerename', Array)
#3 /srv/default/vendor/ZF2/library/Zend/InputFilter/Factory.php(171): Zend\InputFilter\Factory->populateFilters(Object(Zend\Filter\FilterChain), Array)
#4 /srv/default/vendor/ZF2/library/Zend/InputFilter/Factory.php(237): Zend\InputFilter\Factory->createInput(Array)
#5 /srv/default/vendor/ZF2/library/Zend/Form/Form.php(672) in /srv/default/vendor/ZF2/library/Zend/ServiceManager/ServiceManager.php on line 420
Unfortunately I found no article on the entire internet to help me with this, and I still get this error even when aliasing my filter as a factory :/ What do I have to do?
You load the filter as if it is a controller (hence, the controller key in your module config). The filter has a plugin manager, but for this filter you do not need the plugin manager. There is also no link in the filter plugin manager with the MVC configuration.
The most simple way is to just instantiate the filter yourself. It should be something like this that would work:
use Library\Filter\File\Rename as RenameFilter;
public function getInputFilterSpecification()
{
return array(
'file' => array(
'required' => false,
'filters' => array(
new RenameFilter,
),
)
);
}
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