显示的输出有问题模型.ManyToManyField(用户)

2024-03-29 05:05:03 发布

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我通过构建一个名为TravelBuddies的应用程序来学习Django。它将允许旅行者计划他们的旅行,并保留相关的旅行项目(如预订、机票、护照复印件、保险信息等),以及为日常活动创建警报。该应用程序还可以更新当地信息,如天气或每日新闻的旅行者。旅行者还可以与某人共享旅行信息,或者让某人与他们合作计划旅行。你知道吗

我正面临一个问题。我通过Django admin为吉隆坡增加了两项活动。他们将“去植物园”和“去水族馆”

当我转到http://127.0.0.1:8000/triplist/时,我看到这个页面: enter image description here

如您所见,在Co planner字段中,用户名显示为<QuerySet [<User: williams>]>;,但它应该显示为Co-planner: williams。你知道吗

当我点击旅行名称:吉隆坡并前往http://127.0.0.1:8000/triplist/kuala-lumpur/时,同样的问题也会出现: enter image description here

以下是我在models.py中的代码:

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

# Create your models here.
from django.template.defaultfilters import slugify

class Trip(models.Model):
    trip_name = models.CharField(max_length=100)
    date = models.DateField()
    planner_name = models.CharField(max_length=100)
    add_coplanner = models.ManyToManyField(User)
    slug = models.SlugField(max_length=150, default='null')

    def __str__(self):
        return self.trip_name

    def save(self, *args, **kwargs):
        self.slug = slugify(self.trip_name)
        super().save(*args, **kwargs)

class Activity(models.Model):
    trip = models.ForeignKey(Trip, on_delete=models.CASCADE)
    activity_name = models.CharField(max_length=100)
    date = models.DateField(auto_now=True)
    time = models.TimeField(auto_now= True)
    location = models.CharField(max_length=100)
    item_type = models.CharField(max_length=100)
    item_number = models.CharField(max_length=100)
    add_cotraveller = models.ManyToManyField(User)
    slug = models.SlugField(max_length=150, default='null')

    def __str__(self):
        return self.activity_name

    def save(self):
        super(Activity, self).save()
        self.slug = '%i-%s' % (
            self.id, slugify(self.trip.trip_name)
        )
        super(Activity, self).save()

以下是我在views.py中的代码:

from django.views import generic
from .models import Trip, Activity


class TripListView(generic.ListView):
    template_name = 'trips/triplist.html'
    context_object_name = 'all_trips'

    def get_queryset(self):
        return Trip.objects.all()


class ActivityView(generic.DetailView):
    model = Trip
    template_name = 'trips/activity.html'

以下是我在urls.py中的代码:

from . import views
from django.urls import path

app_name = 'trips'

urlpatterns = [
    path('triplist/', views.TripListView.as_view(), name='triplist'),
    path('triplist/<slug:slug>/', views.ActivityView.as_view(), name='activity'),
]

以下是我在apps.py中的代码:

from django.apps import AppConfig


class TripsConfig(AppConfig):
    name = 'trips'

以下是我在triplist.html中的代码:

<!DOCTYPE html>
{% extends 'trips/base.html' %}
{% load static %}
<html lang="en">
<link rel="stylesheet" type="text/css" href="{% static "css/style.css" %}">

<head>
    <meta charset="UTF-8">
    {% block title%}Trip list{% endblock %}
    <title>Trip list</title>
</head>


<body>
    {% block content %}
    <!--Page content-->
    <h1>This is Trip List Page</h1>


    <ol>
        {% for trip in all_trips %}
        <ol>
            <li><a href="{% url 'trips:activity' trip.slug %}">Trip name: {{ trip.trip_name }}</a></li>
            Date: {{ trip.date }}<br>
            Planner: {{ trip.planner_name }}<br>
            Co-planner: {{ trip.add_coplanner.all }}<br>
        </ol>
        {% endfor %}


    </ol>

    <img src="{% static "images/botanical-garden.jpg" %}" alt="Botanical Garden" />
    <!-- New line -->
    {% endblock %}
</body>
</html>

</html>

以下是我在activity.html中的代码:

{% extends 'trips/base.html' %}
{% block title%}
Detail
{% endblock %}


{% block content %}

<h3>Activities for {{trip.trip_name}} </h3>

{% for trip_item in trip.activity_set.all %}
<!--<p>Activity name: {{ trip_item.activity_name }}</p>-->
<ol>
    <li>Activity name: {{ trip_item.activity_name }}</li>
    Date: {{ trip_item.date }}<br>
    Time: {{ trip_item.time }}<br>
    Location: {{ trip_item.location }}<br>
    Item Type: {{ trip_item.item_type }}<br>
    Item No: {{ trip_item.item_number }}<br>
    Co-traveller: {{ trip_item.add_cotraveller.all }}
</ol>
{% endfor %}

{% endblock %}

有什么问题吗三重列表.html以及活动.html?你知道吗

更新1:顺便说一句,我是从这个链接Auth.User.None when rendering a ManyToManyField得到这个代码add_coplanner = models.ManyToManyField(User)的。你知道吗

问这个问题的人也面临着和我一样的问题。他得到了类似<User: gg>]>的东西。他被建议改写str法。但我不知道怎么做。你知道吗


Tags: namefrombrimportselfmodelshtmlactivity
2条回答

您需要在这里迭代,因为它是查询集

你知道吗三重列表.html你知道吗

  Coplanners: 
    {% for user in trip.add_coplanner.all %}
        {{user.name}} 
        #{{user.username}} do this if your User model don't have name field
     #If you want to separate the users with comma
       {% if not forloop.last %} , {% endif %}
    {% endfor %}<br>

在“活动”模型中添加此

    def get_cotravellers(self):
          return " , ".join([x.username for x in self.add_cotraveller.all()])

在template中称之为{{ trip_item.get_cotravellers }}

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