如何在Symfony中只填写具有特定角色的用户？

Question

我正在做一个简单的票据管理系统，我有两个实体。User 旗下 id, email, roles[] (Admin, Technician or Client)和 username, password, tickets[] (which are all the tickets the client has submitted).我有一个 TicketFormType 类，让我可以创建新的票据，并为其分配 a technician to that ticket，这里是它的代码。

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('title', TextType::class, [
            'label' => 'Title',
            'attr' => ['placeholder' => 'Ticket title']
        ])
        ->add('priority', ChoiceType::class, [
            'multiple' => false,
            'choices' => [
                'Very High' => 5,
                'High' => 4,
                'Medium' => 3,
                'Low' => 2,
                'Very Low' => 1
            ]
        ])
        ->add('body')
        ->add('assignmentDate')
        ->add('technician') // this field gets populated with all users including those who don't have ROLE_TECHNICIAN
        ->add('customer')
    ;
}

现在在我的数据库结构中，我有 ticket table 这些领域 id technician_id customer_id title priority body assignment_date 哪儿 technician_id 是FK到PK中的table user我的问题是，技术员字段是一个下拉菜单，它被填充了所有用户的 User table 包括那些没有 ROLE_TECHNICIAN. 我如何解决这个问题？

NOTE: I store all technicians, clients, admins in table Users

Answer 1

你可以用一个QueryBuilder这样的。

    $builder
        ->add('title', TextType::class, [
            'label' => 'Title',
            'attr' => ['placeholder' => 'Ticket title']
        ])
        ->add('priority', ChoiceType::class, [
            'multiple' => false,
            'choices' => [
                'Very High' => 5,
                'High' => 4,
                'Medium' => 3,
                'Low' => 2,
                'Very Low' => 1
            ]
        ])
        ->add('body')
        ->add('assignmentDate')
        ->add('technician') // this field gets populated with all users including those who don't have ROLE_TECHNICIAN
        ->add('technician', EntityType::class, [
            'class' => User::class,
            'query_builder' => function (EntityRepository $er) {
                return $er->createQueryBuilder('u')
                    ->andWhere('u.ROLE LIKE :role')
                    ->setParameter('role', '%\'ROLE_TECHNICIAN\'%');
            },
            'choice_label' => 'username',
        ])
        ->add('customer')
    ;

你必须根据你的需要来调整这个。