如何修复ArrayCollection中的空数组？

Question

输出

App\Entity\TourPackage {#313 ▼ -id: null -tour_category: “文化旅游”-价格：“3400”-旅游概述：“”“

<div>tourPackageImage1</div>
"""   -images:  Doctrine\Common\Collections \ ArrayCollection {#314 ▼
-elements: array:2 [▼
  0 =>  App\Entity \ Images {#630 ▼
    -id: null
    -image_name: null
    -tourPackage:  App\Entity \ TourPackage {#313}
  }
  1 =>  App\Entity \ Images {#438 ▼
    -id: null
    -image_name: "random_image.jpg"
    -tourPackage:  App\Entity \ TourPackage {#313}
  }
]   }   -itinerary:  Doctrine\Common\Collections \ ArrayCollection {#315 ▶} }

旅游套餐类型

        ->add('images',CollectionType::class,[
            'entry_type' => ImageType::class,
            'allow_add' => true,
            'allow_delete' => true,
            'prototype' => true,
            'label' => false,
            'by_reference' => false,
        ])

图像类型

    $builder
        ->add('tour_image_1', FileType::class,[
            'mapped' => false,
            'required' => false
        ])
        ->add('tour_image_2', FileType::class,[
            'mapped' => false,
            'required' => false
        ])
        ->add('tour_image_3', FileType::class,[
            'mapped' => false,
            'required' => false
        ])
    ;

控制器

        $tourPackageImage1 = $request->files->get('tour_package')['images']['__name__']['tour_image_1'];
        $tourPackageImage2 = $request->files->get('tour_package')['images']['__name__']['tour_image_2'];
        $tourPackageImage3 = $request->files->get('tour_package')['images']['__name__']['tour_image_3'];

        $tour_images = [$tourPackageImage1, $tourPackageImage2, $tourPackageImage3];
            $images = new Images();
            $images->setImageName($uploadImage->uploadImage($tourPackageImage1));
            $tourPackage->addImage($images);
 
        dd($tourPackage);

当 dd($tourPackage) 时，第一个数组为空。我什至试图让条件不起作用。如何解决这个问题？

  0 =>  App\Entity \ Images {#630 ▼
    -id: null
    -image_name: null
    -tourPackage:  App\Entity \ TourPackage {#313}
  }
  1 =>  App\Entity \ Images {#438 ▼
    -id: null
    -image_name: "random_image.jpg"
    -tourPackage:  App\Entity \ TourPackage {#313}
  }

如果上传 3 张图片，则第 1 张为空，在空数组后添加 3 张图片。如何删除空数组？

Answer 1

我建议：

$tourPackageValid = array_filter($tourPackage, function ($item){
    return $item->getImageName() !== null;
});