在应用 DataTransformer 之前验证字段 [英] Validate field before DataTransformer is applied

问题描述

在我的 Symfony 应用程序中，我有一个带有地址的事件实体.这个地址应该可用于许多事件，所以我添加了一个 ManyToOne-relation.

address 实体包含 3 个字段(street、zipcode 和 city)，但我想在我的表单 EventType 中，只有 1 个带有 address 预先输入的文本输入.所以我创建了一个 DataTransformer 来做到这一点.

通过 AJAX 请求，我收到地址并插入它们.如果输入了新地址，我想创建一个新的数据库记录.我现在的问题是验证新输入的地址.

我的 DataTransformer 看起来像这样:

class StringToAddressTransformer 实现 DataTransformerInterface {/*** @var 对象管理器*/私人 $om;/*** @param ObjectManager $om*/公共函数 __construct(ObjectManager $om){$this->om = $om;}公共函数变换($addrobj){如果(！$addrobj){返回空；}返回(字符串)$ addrobj;}公共函数 reverseTransform($address){if (null === $address) {返回 "";}preg_match('/^([A-Z][-A-Z ]+)\s+(\d+), (\d{5}) ([A-Z]+)$/i', $address, $res);$street = $res[1] .' '.$res[2];$zipcode = $res[3];$city = $res[4];$addrobj = $this->om->getRepository('FSchubert\SiyabongaBundle\Entity\Address')->findOneBy(array('街道' =>$street, '邮政编码' =>$邮政编码，'城市' =>$city));if(is_null($addrobj)){$addrobj = 新地址();$addrobj->setStreet($street);$addrobj->setZipcode($zipcode);$addrobj->setCity($city);}返回 $addrobj;}}

一切正常，但我绝对没有对输入的地址进行验证.

我尝试在表单类中添加约束，但由于 DataTransformer 在 bindRequest() 上被调用，在我看来，验证约束被忽略了.

基本上，我希望在我的 DataTransformer 中进行表单验证或以任何方式验证不存在的字段.如果我手动调用 RegEx-Validator，我的代码会是什么样子?或者是否有另一种(更好的)方法来实现我正在寻找的东西?

解决方案

好的，我找到了答案.这远不是最好的方法.除了一个字符串addressstring，我刚刚从Address-Entity 中删除了所有字段.现在我可以将多个事件映射到一个位置并进行适当的 ajax 调用.但不幸的是，我无法再确定每个地址的城市、街道或邮政编码.这工作正常，但正如我所说的不是解决方案.我避免了真正的问题......但它有效.

In my Symfony application, I have an event entity with an address. This address should be available for many events, so I added a ManyToOne-relation.

The address entity contains 3 fields (street, zipcode and city), but I would like to have only 1 text input with typeahead for the address in my form EventType. So I created a DataTransformer to do so.

Via an AJAX Request, I recieve the addresses and insert them. If a new address is entered I would like to create a new Database record. My problem now would be the validation for the new entered address.

My DataTransformer looks like this:

class StringToAddressTransformer implements DataTransformerInterface {

    /**
     * @var ObjectManager
     */
    private $om;

    /**
     * @param ObjectManager $om
     */
    public function __construct(ObjectManager $om){
        $this->om = $om;
    }

    public function transform($addrobj){
        if (!$addrobj) {
            return null;
        }

    return (string)$addrobj;
    }

    public function reverseTransform($address){

        if (null === $address) {
            return "";
        }

        preg_match('/^([A-Z][-A-Z ]+)\s+(\d+), (\d{5}) ([A-Z]+)$/i', $address, $res);

        $street = $res[1] . ' '. $res[2];
        $zipcode = $res[3];
        $city = $res[4];    

        $addrobj = $this->om->getRepository('FSchubert\SiyabongaBundle\Entity\Address')->findOneBy(array(
            'street' => $street, 'zipcode' => $zipcode, 'city' => $city
        ));

        if(is_null($addrobj)){
            $addrobj = new Address();
            $addrobj->setStreet($street);
            $addrobj->setZipcode($zipcode);
            $addrobj->setCity($city);
        }

    return $addrobj;
    }
}

It all works out fine, but I have absolutely no validation for the entered address.

I tried adding a constraint in the form class but since the DataTransformer is called on bindRequest() it appeares to me that the validation-constraint is ignored.

Basically, I want form validation in my DataTransformer or any way to validate a non-existend field. If I call the RegEx-Validator manually what would my code look like? Or is there another (better) way to achive what I am looking for?

解决方案

Okay I found an answer. It is by far not the best way. I just removed all fields from the Address-Entity except for one string addressstring. Now I can map multiple events to one location and make propper ajax-calls. But unfortunaly I can nolonger determine the city, street or zipcode of each address. This works fine but is, as I stated not the solution. I avoided the real problem... but it works.

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