Symfony 6 使用动态实体填充下拉列表

Question

我有一个 CreditCard 实体，在表单屏幕上有一个包含用户银行实体的下拉列表，我想根据所选银行动态填写 BankAccount 下拉列表，我已经尝试了 SO 的几个解决方案并在我的表单中添加了一个事件侦听器但是当我更改银行下拉菜单我收到“违反完整性约束：kart_adi（实体上的信用卡名称字段）不能是 null。我正在使用 Symfony 6 和 php.28。

KrediKarti.php：

class KrediKarti
{
#[ORM\Id]
#[ORM\GeneratedValue]
#[ORM\Column(type: 'integer')]
private $id;

#[ORM\ManyToOne(targetEntity: Banka::class)]
#[ORM\JoinColumn(nullable: false)]
private $banka;

#[ORM\ManyToOne(targetEntity: BankaHesap::class, inversedBy: 'krediKartlari')]
#[ORM\JoinColumn(nullable: false)]
private $hesap;

#[ORM\Column(type: 'string', length: 255)]
private $kart_adi;

#[ORM\Column(type: 'string', length: 255)]
private $kart_no;

#[ORM\Column(type: 'integer')]
private $hesap_kesim_gunu;

#[ORM\Column(type: 'string', length: 255, nullable: true)]
private $aciklama;

#[ORM\Column(type: 'float')]
private $borc;

#[ORM\Column(type: 'float')]
private $alacak;

#[ORM\Column(type: 'datetime_immutable')]
private $created_at;

public function getId(): ?int
{
    return $this->id;
}

public function getBanka(): ?Banka
{
    return $this->banka;
}

public function setBanka(?Banka $banka): self
{
    $this->banka = $banka;

    return $this;
}

public function getHesap(): ?BankaHesap
{
    return $this->hesap;
}

public function setHesap(?BankaHesap $hesap): self
{
    $this->hesap = $hesap;

    return $this;
}

public function getKartAdi(): ?string
{
    return $this->kart_adi;
}

public function setKartAdi(string $kart_adi): self
{
    $this->kart_adi = $kart_adi;

    return $this;
}

public function getKartNo(): ?string
{
    return $this->kart_no;
}

public function setKartNo(string $kart_no): self
{
    $this->kart_no = $kart_no;

    return $this;
}

public function getHesapKesimGunu(): ?int
{
    return $this->hesap_kesim_gunu;
}

public function setHesapKesimGunu(int $hesap_kesim_gunu): self
{
    $this->hesap_kesim_gunu = $hesap_kesim_gunu;

    return $this;
}

public function getAciklama(): ?string
{
    return $this->aciklama;
}

public function setAciklama(?string $aciklama): self
{
    $this->aciklama = $aciklama;

    return $this;
}

public function getBorc(): ?float
{
    return $this->borc;
}

public function setBorc(float $borc): self
{
    $this->borc = $borc;

    return $this;
}

public function getAlacak(): ?float
{
    return $this->alacak;
}

public function setAlacak(float $alacak): self
{
    $this->alacak = $alacak;

    return $this;
}

public function getCreatedAt(): ?\DateTimeImmutable
{
    return $this->created_at;
}

public function setCreatedAt(\DateTimeImmutable $created_at): self
{
    $this->created_at = $created_at;

    return $this;
}
}

KrediKartiType.php：

$builder
        ->add('kart_adi',TextType::class,['label' => 'Kart Adı','required' => false, 'attr' =>['class' => 'form-control', 'placeholder' => 'Kart Adı']])
        ->add('kart_no',TextType::class,['label' => 'Kart No','required' => false, 'attr' =>['class' => 'form-control', 'placeholder' => 'Kart No']])
        ->add('hesap_kesim_gunu', NumberType::class, [
            'label' => 'Hesap Kesim Tarihi', 'attr' =>['class' => 'form-control', 'placeholder' => 'Hesap Kesim Günü']
        ])
        ->add('aciklama',TextType::class,['label' => 'Açıklama','required' => false, 'attr' =>['class' => 'form-control', 'placeholder' => 'Açıklama']])
        ->add('borc', NumberType::class,
            [
                'label' => 'Borç', 'attr' =>['class' => 'form-control', 'placeholder' => "Borç",'value' => '0.00','style' => 'text-align: right']
            ])
        ->add('alacak', NumberType::class,
            [
                'label' => 'Alacak', 'attr' =>['class' => 'form-control', 'placeholder' => "Alacak",'value' => '0.00','style' => 'text-align: right']
            ])
        ->add('banka',  EntityType::class, array(
            'class' => Banka::class,
            'choice_label'=> 'adi',
            'placeholder' => 'Lütfen bankanızı seçiniz',
            'attr' =>['class' => 'form-control']
        ))

    ;

    $formModifier = function (FormInterface $form, Banka $banka = null) {
        $banka_hesap = null === $banka ? [] : $banka->getBankaHesaplari();

        $form->add('hesap', EntityType::class, [
            'class' => BankaHesap::class,
            'placeholder' => '',
            'choices' => $banka_hesap,
        ]);
    };

    $builder->addEventListener(
        FormEvents::PRE_SET_DATA,
        function (FormEvent $event) use ($formModifier) {
            $data = $event->getData();

            $formModifier($event->getForm(), $data->getBanka());
        }
    );

    $builder->get('banka')->addEventListener(
        FormEvents::POST_SUBMIT,
        function (FormEvent $event) use ($formModifier) {
            $banka = $event->getForm()->getData();

            $formModifier($event->getForm()->getParent(), $banka);
        }
    );

新的.html.twig：

<script>
var $banka = $('#kredi_karti_banka');
var $token = $('#kredi_karti__token');
$banka.change(function() {
    var $form = $(this).closest('form');
    var data = {};
    data[$banka.attr('name')] = $banka.val();
    data[$token.attr('name')] = $token.val();
    $.ajax({
    url : $form.attr('action'),
    type: $form.attr('method'),
    data : data,
    complete: function(html) {
    // Replace current position field ...
    $('#kredi_karti_hesap').replaceWith(
    // ... with the returned one from the AJAX response.
    $(html.responseText).find('#meetup_position')
    );
    // Position field now displays the appropriate positions.
    }
    });
});
</script>

我只是想根据银行找零时选择的银行来获取银行账户。

Answer 1

您可以在创建表单时向表单添加选项。 因此，您可以创建一个端点，您可以在其中使用可能是bank ID 的额外选项创建表单，然后仅呈现您希望的 select 元素，在您的情况下为bank_accounts select。 您可以通过 JS 在更改事件时将此端点调用到banks select。 您还需要修改KrediKartiType以便bank_accounts select 应该从查询生成器中获取值。 例如：

class BankAccountsController extends AbstractController
{
    #[Route('/bank-accounts-select', name: 'bank_accounts_select', methods: ['GET'])]
    public function getBankAccountsSelect(Request $request): Response
    {
        $form = $this->createForm(
            KrediKartiType::class,
            null,
            ['bankId' => $request->query->get('bankId')]
        );

        return $this->render('_bank-accounts-select.html.twig', [
            'form' => $form->createView(),
        ]);
    }
}

bank_accounts键的表单类型可能如下所示：

->add('bank_accounts', EntityType::class, [
      'class' => BankaHesap::class,
      'query_builder' => function (BankaHesapRepository $bankaHesapRepository) use ($options) {
           return $bankaHesapRepository->bankAccountsByBankId((int) $options['bankId']);
       },
       'label_attr' => ['class' => 'mb-0 d-block'],
])

从 bankId 获取银行账户的 Repository 方法：

public function bankAccountsByBankId(?int $bankId): QueryBuilder
{
   return $this->createQueryBuilder('bh')
     ->join('bh.bank', 'b')
     ->where('b.id = :bankId')
     ->setParameter('bankId', $bankId)
     ->orderBy('bh.name', 'ASC') // this is optional :)
   ;
}

You would also need the twig file which renders the select element _bank-accounts-select.html.twig :

{{ form_row(form.bank_accounts, {
    attr: {
        'class': 'mb-3 form-control'
    }
}) }}

最后是 Js 部分，您需要调用端点bank-accounts-select ，将 select 替换为从端点获得的：

$bankSelect.on('change', (event) => {
  const bankId = event.target.value;
  $.ajax({
      url: BASE_URL+'/bank-accounts-select',
      data: {
        bankId: bankId,
      },
      success: function (html) {
        const $bankAccountsSelect = REGION_SELECT_FROM_CLASS_NAME //replace this with your jQuery/Javascript selector;
        $bankAccountsSelect.html($(html).find("option"));
        $bankAccountsSelect.val("").trigger("change");
      },
    });
});

应该这样做，我建议您在代码中使用英语；）