Question

我想在Django的一个模板html页面中演示两层“ for”循环。第一层是主题，第二层是每个主题下的条目。这是主题和主题的view.py。

def topics(request):
    topics = Topic.objects.filter(owner=request.user).order_by("date_added")
    context = {"topics": topics}
    return render(request, "project/topics.html", context)
def topic(request, topic_id):
    topic = Topic.objects.get(id=topic_id)
    entries = topic.entries.order_by("-date_added")
    context = {"entries": entries}
    return render(request, "project/topic.html", context)

在topic.html模板中，我想演示以下主题以及每个主题下的每个条目。但是我怎么能做到呢？

{% for topic in topics %}
  <a href="{% url 'project:topic' topic.id %}">{{ topic.text }}</a>
  {% for entry in entries %}
    <a href="{% url 'project:entry' entry.id %}">{{ entry.text }}</a>

我尝试提供的链接（nested for loops inside templates），但似乎不起作用。这是模板中的脚本。您能帮忙吗？

{% for topic in topics %} 
  {% for entry in topic.entries_set.all %}
    <a href="{% url 'project:entry' entry.id %}">{{ entry.text }}</a>
  {% endfor %} 
{% endfor %}

这是模型：

from django.db import models
from django.contrib.auth.models import User

# Create your models here.
owner = models.ForeignKey(User, on_delete=models.CASCADE)
class Topic(models.Model):
    text = models.CharField(max_length=200)
    date_added = models.DateTimeField(auto_now_add=True)
    owner = models.ForeignKey(User, on_delete=models.CASCADE)
    def _str_(self):
        return self.text

class Entry(models.Model):
    topic = models.ForeignKey(Topic, on_delete=models.CASCADE, related_name="entries")
    text = models.TextField()
    date_added = models.DateTimeField(auto_now_add=True)
    class Meta:
        verbose_name_plural = 'entries'

    def _str_(self):
        return self.text[:50] + "..."
        #on_delete=models.CASCADE,

两层for循环，用于展示Django模板中的列表

0 个答案: