如何在 html.twig 上显示链接到主实体的另一个实体？

Question

我无法在链接的另一个 html.twig 上展示一个实体的属性。

基本上，一个名为 Cats 的实体，一个名为 Appointment 关系的实体 ManyToOne（一只猫可以有多个约会，但一个约会只链接到一只猫）

猫实体：

/**
 * @ORM\OneToMany(targetEntity=Appointment::class, mappedBy="cat", orphanRemoval=true)
 */
private $appointments;

/**
 * @return Collection|Appointment[]
 */
public function getAppointments(): Collection
{
    return $this->appointments;
}

public function addAppointment(Appointment $appointment): self
{
    if (!$this->appointments->contains($appointment)) {
        $this->appointments[] = $appointment;
        $appointment->setCat($this);
    }

    return $this;
}

public function removeAppointment(Appointment $appointment): self
{
    if ($this->appointments->removeElement($appointment)) {
        // set the owning side to null (unless already changed)
        if ($appointment->getCat() === $this) {
            $appointment->setCat(null);
        }
    }

    return $this;
}

预约实体：

/**
 * @ORM\ManyToOne(targetEntity=Cats::class, inversedBy="appointments", cascade={"persist"} )
 * @ORM\JoinColumn(nullable=false)
 */
private $cat;

public function getCat(): ?Cats
{
    return $this->cat;
}

public function setCat(?Cats $cat): self
{
    $this->cat = $cat;

    return $this;
}

这是我在 html.twig 中为 appointment_show

尝试做的事情

{% extends 'base.html.twig' %}
{% block title %}Appointment{% endblock %}
{% block main %}

<h1>Appointment</h1>

{% for cat in appointment.cats %}
    <div>
        <td>{{ appointment.cat_id }}</td>
    </div>
{% endfor %}

所以我一直收到错误消息：

属性“cats”和“cats()”、“getcats()”/“iscats()”/“hascats()”或“ __call()”在 class“App\Entity\Appointment”中存在并具有 public 访问权限。

你能帮忙吗？

Answer 1

谢谢，我将代码更改为以下并且有效：

{% for appointment in appointments %}
    {% set cat = appointment.cat %}
        <div>
            {{ cat.id }}
        </div>
{% endfor %}

如何在 html.twig 上显示链接到主实体的另一个实体？

How can I show another Entity linked to the main one on html.twig?

php

entity

symfony

twig