Symfony形式query_buider和实体存储库

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问题描述

我正在尝试创建一个表单，该表单的数据类型为集合类型，具体取决于要登录的用户。我正在。

I'm trying to create a form with data in collection type depending on the user being logged. I'm following this chapter of the Symfony cookbook.

当 query_builder 选项是一个从我从DQL获取数据的闭包时，一切工作正常。由于需要从代码的不同位置获取数据，因此，我希望在Repository类中定义查询。

Everything works fine when the query_builder option is a closure where I get my data from DQL. As the data need to be fetched from different location in code, I would prefer to define the query in the Repository class.

这是我的存储库中的函数：

Here is the function in my repository :

public function findOwnedBy($user) {
    $query = $this->getEntityManager()->createQuery("SELECT l FROM MyBundle:Article a JOIN a.owndBy u WHERE u.id = :userId");
    $query->setParameters(array("userId"=>$user->getId()));
    return $query->getResult();
}

此函数在Controller中调用并返回Article数组时有效。这是symfony doc的摘要：

This function works when called in a Controller and return an array of Article. Here is a snippet of the symfony doc :

$formOptions = array(
                    'class' => 'Acme\DemoBundle\Entity\User',
                    'multiple' => false,
                    'expanded' => false,
                    'property' => 'fullName',
                    'query_builder' => function(EntityRepository $er) use ($user) {
                        // build a custom query, or call a method on your repository (even better!)
                    },
                );

当我在query_builder中调用存储库函数时，出现错误： Doctrine\ORM\QueryBuilder类型的预期参数，给出了数组 ，我可以理解，因为我的存储库返回的是实体数组，而不是QueryBuilder。

When I put a call to my Repository function in the query_builder, I get an error : Expected argument of type "Doctrine\ORM\QueryBuilder", "array" given, which I can understand because my Repository returns an array of Entity, not a QueryBuilder.

我不想复制代码并在表单中创建一个新的QueryBuilder。使用存储库中的查询的最佳实践是什么？我当时在考虑在存储库中有两个功能，一个返回数组，另一个返回QueryBuilder，但是Symfony文档中的注释 或在存储库上调用方法（甚至更好！）让我认为这种情况有更好的方法。

I don't want to duplicate code and create a new QueryBuilder in the Form. What is the best practice to use the query from the Repository ? I was thinking of having two function in the repository, one returning an array and the other returning the QueryBuilder, but the comment in Symfony doc "or call a method on your repository (even better!)" let me think there's better way for this case.

推荐答案

应该很容易。请执行以下操作：

It should be easy. Do the following:

public function queryOwnedBy($user) {

    $query = $this->createQueryBuilder('a')
            ->from('MyBundle:Article', 'a')
            ->innerJoin('a.owndBy', 'u')
            ->where('u.id = :id')                
            ->setParameter('id', $user->getId());

    return $query;
}

public function findOwnedBy($user) {
    return $this->queryOwnedBy($user)
            ->getQuery()
            ->getResult();
}

然后在表单生成器中：

$formOptions = array(
    'class' => 'Acme\DemoBundle\Entity\User',
    'multiple' => false,
    'expanded' => false,
    'property' => 'fullName',
    'query_builder' => function(EntityRepository $er) use ($user) {
        return $er->queryOwnedBy($user);
    },
);

编辑

感谢ncatnow和unagi我更改了以前的函数以返回querybuilder

Thank's for ncatnow and unagi I've changed the previous functions to return the querybuilder

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Querybuilder