从 ManyToManyField 列出对象 [英] listing objects from ManyToManyField

问题描述

我正在尝试打印所有会议的列表，并为每个会议打印其 3 位发言人.

I am trying to print a list of all the Conferences and for each conference, print its 3 Speakers.

在我的模板中，我有:

{% if conferences %}
        <ul>
        {% for conference in conferences %}
                <li>{{ conference.date }}</li>
                {% for speakers in conference.speakers %}
                        <li>{{ conference.speakers }}</li>
                {% endfor %}
        {% endfor %}
        </ul>
{% else %}
<p>No Conferences</p>
{% endif %}

在我的 views.py 文件中:

in my views.py file I have:

from django.shortcuts import render_to_response
from youthconf.conference.models import Conference

def manageconf(request):
        conferences = Conference.objects.all().order_by('-date')[:5]
        return render_to_response('conference/manageconf.html', {'conferences': conferences})

有一个名为会议的模型.它有一个名为 Conferences 的类和一个名为 speakers

there is a model named conference. which has a class named Conferences with a ManyToManyField named speakers

我收到错误:

Caught an exception while rendering: 'ManyRelatedManager' object is not iterable

用这一行:{% for speaks in meeting.speakers %}

推荐答案

您需要在多对多字段上调用 ​​all 以获取可迭代对象.此外，下一行应包含发言人而不是 conference.speakers.

You need to call all on the many-to-many field to get an iterable object. Also, the next line should contain the speaker rather than conference.speakers.

{% for speaker in conference.speakers.all %}
        <li>{{ speaker }}</li>
{% endfor %}

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