forms - symfony2 带有参数的表单查询构建器

Question

我想将我的实体放在查询构建器的功能中:

->add( 'weeks', 'entity', array(
    'class' => 'MV\CaravanBundle\Entity\CaravanRow',
    'property' => 'line',
    'query_builder' => function(EntityRepository $er ) use ( $caravan ) {
        return $er->createQueryBuilder('w')
                  ->orderBy('w.dateFrom', 'ASC')
                  ->where('w.caravan = ?', $caravan )
                  ->andWhere('w.visible = 1')
                  ->andWhere('w.booked = 0');
}

但得到消息:

Expression of type 'Entity\Name' not allowed in this context

那么提供查询构建器信息的(最佳)方法是什么。

Answer 1

您应该像这样单独设置参数:

->add( 'weeks', 'entity', array(
    'class' => 'MV\CaravanBundle\Entity\CaravanRow',
    'property' => 'line',
    'query_builder' => function(EntityRepository $er ) use ( $caravan ) {
        return $er->createQueryBuilder('w')
                  ->orderBy('w.dateFrom', 'ASC')
                  ->where('w.caravan = ?1')
                  ->andWhere('w.visible = 1')
                  ->andWhere('w.booked = 0')
                  ->setParameter(1, $caravan);
}

您可以使用整数或字符串，但每种的语法略有不同。见 the docs