Symfony5控制器函数中如何定义实体且无需在路由中携带实体ID

根本原因 #

你当前的实现依赖Symfony的ParamConverter组件从路由参数中读取ID，自动查询对应的Adresse、Employes、Contact实体注入到控制器参数中，因此必须在路由中携带三个ID参数。要实现无参数的路由，只需移除这三个自动注入的实体参数，改为手动实例化或按需查询实体即可。

适配场景1：表单用于新增数据 #

如果三个表单都是用于提交新增数据，不需要绑定已有实体，直接实例化空实体绑定表单即可：

/**
 * @Route("/companyProfile", name="company_profile")
 */
public function index(ContactRepository $contactrepository, EmployesRepository $employesrepository , AdresseRepository $adresserepository ): Response
{   
    $contactform = $this->createForm(ContactType::class, new Contact());
    $employesform = $this->createForm(EmployesType::class, new Employes());
    $adresseform = $this->createForm(AdresseType::class, new Adresse());

    return $this->render('companyProfile.html.twig', [
        'Contact' => $contactrepository->findAll(),
        'Employes' => $employesrepository->findAll(),
        'Adresse' => $adresserepository->findAll(),
        'contactform' => $contactform->createView(),
        'employesform' => $employesform->createView(),
        'adresseform' => $adresseform->createView()
    ]);
}

适配场景2：表单用于编辑当前登录用户关联的实体 #

如果需要绑定和当前登录用户关联的已有实体，通过Symfony的Security组件获取当前用户后查询关联实体即可：

/**
 * @Route("/companyProfile", name="company_profile")
 */
public function index(Security $security, ContactRepository $contactrepository, EmployesRepository $employesrepository , AdresseRepository $adresserepository ): Response
{   
    // 获取当前登录用户
    $currentUser = $security->getUser();
    // 按实际业务关联逻辑获取对应实体，示例为User实体直接关联三个目标实体
    $adresse = $currentUser->getAdresse();
    $employes = $currentUser->getEmployes();
    $contact = $currentUser->getContact();

    $contactform = $this->createForm(ContactType::class, $contact);
    $employesform = $this->createForm(EmployesType::class, $employes);
    $adresseform = $this->createForm(AdresseType::class, $adresse);

    return $this->render('companyProfile.html.twig', [
        'Contact' => $contactrepository->findAll(),
        'Employes' => $employesrepository->findAll(),
        'Adresse' => $adresserepository->findAll(),
        'contactform' => $contactform->createView(),
        'employesform' => $employesform->createView(),
        'adresseform' => $adresseform->createView()
    ]);
}

注意事项 #

你原有代码存在变量大小写不匹配的问题：方法参数声明的是小写开头的$adresse、$employes、$contact，创建表单时用的是大写开头的$Adresse、$Employes、$Contact，PHP对变量名大小写敏感，该问题会直接触发变量未定义错误，修改时需同步修正。

内容的提问来源于stack exchange，提问作者Taekook Bts