Question

我想使用Symfony 2.7和自定义查询构建器创建依赖表单，但PRE_SUBMIT会继续实例化错误的对象。

我已将github中的整个代码上传了一些数据sampleData.sql。

CityType

public function buildForm(FormBuilderInterface $builder,array$options){

    $builder->add('country', 'entity', array(
        'class' => 'TestMyBundle:Country',
        'choice_label' => 'country'
    ));
    $builder->add('Search','submit');

    $stateFormbuilder = function(FormInterface $form,$country_Id){
        $search = $form->get('Search');
        $form->remove('Search');
        $form->add('state','entity',array(
            'class'=>'TestMyBundle:State',
            'query_builder'=>function(EntityRepository $repository) use ($country_Id){
                return $repository->createQueryBuilder('State')
                                    ->where('State.countryId= :countryId')
                                    ->setParameter('countryId',$country_Id)
                                    ->orderBy('State.state','ASC')
                                    ;
            }
        ));
    };
    $CityFormbuilder = function(FormInterface $form, $state_Id){
        $form->add('city','entity',array(
            'class'=>'TestMyBundle:City',
            'query_builder'=>function(EntityRepository $repository) use ($state_Id){
                return $repository->createQueryBuilder('City')
                                  ->where('City.countryId= :countryId')
                                    ->setParameter('City.stateId',$state_Id)
                                    ->orderBy('City.city','ASC')
                                    ;
            }
        ));
    };
    $CityAreaFormBuilder = function(FormInterface $form, $city_Id){
        $form->add('cityArea','entity',array(
            'class'=>'TestMyBundle:CityArea',
            'query_builder'=>function(EntityRepository $repository) use ($city_Id){
                return $repository->createQueryBuilder('CityArea')
                    ->where('CityArea.city= :cityId')
                    ->setParameter('CityArea.cityId',$city_Id)
                    ->orderBy('CityArea.cityArea','ASC')
                    ;
            }
        ));
        $form->add('Search','submit');
    };
    //$CityFormbuilder, $CityAreaFormBuilder
    //$builder->add('Search', 'submit');
    // State
    $builder->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) use($stateFormbuilder) {
        $country = $event->getData();
        $country_id = null;
        if(null!== $country){
            $country_id = $country->getId();
        }
        $stateFormbuilder($event->getForm(),$country_id);
    });
    $builder->addEventListener(FormEvents::PRE_SUBMIT,function(FormEvent $event) use($stateFormbuilder){
        $data = $event->getData();
        $country_id = array_key_exists('id',$data) ? $data['id']:null;
        $stateFormbuilder($event->getForm(),$country_id);
    });
    // City
    $builder->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) use($CityFormbuilder) {
        $state = $event->getData();
        $stateId = null;
        if(null!==$state){
            $stateId = $state->getId();
        }
        $CityFormbuilder($event->getForm(),$stateId);
    });
    $builder->addEventListener(FormEvents::PRE_SUBMIT,function(FormEvent $event) use($CityFormbuilder){
        $data = $event->getData();
        $city_id = array_key_exists('id',$data) ? $data['id']:null;
        $CityFormbuilder($event->getForm(),$city_id);
    });
    // City Area
    $builder->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) use($CityAreaFormBuilder) {
        $cityArea = $event->getData();
        $cityAreaId = null;
        if(null!==$cityArea){
            $cityAreaId= $cityArea->getId();
        }
        $CityAreaFormBuilder($event->getForm(),$cityAreaId);
    });
    $builder->addEventListener(FormEvents::PRE_SUBMIT,function(FormEvent $event) use($CityAreaFormBuilder){
        $data = $event->getData();
        $cityArea_Id = array_key_exists('id',$data) ? $data['id']:null;
        $CityAreaFormBuilder($event->getForm(),$cityArea_Id);
    });
}

My Stack Trace

错误：在非对象
上调用成员函数getId（）

Answer 1

如documentation中所述，如果没有数据传递给表单，$event->getData()为空。

对于使用EventListener事件的3个PRE_SET_DATA中的每一个，添加以下检查（我以最后一个事件为例）：

$state = $event->getData();
$stateId = null;

if (null !== $state) {
    $stateId = $state->getId();
}

然后，根据$stateId的值来做你的逻辑。

Symfony中的从属表单2.7错误：非对象上的getId（）

1 个答案: