我正在通过构建一个名为TravelBuddies的应用程序来学习Django。它将允许旅行者计划行程并保留相关的旅行项目(例如预订,机票,护照副本,保险信息等),以及为日常活动创建提醒。该应用程序还将能够向旅行者更新本地信息,例如天气或每日新闻。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来计划旅行。
我遇到了问题。我通过Django管理员为吉隆坡添加了两个活动。他们是“去植物园”和“去水族馆”。
当我转到http://127.0.0.1:8000/triplist/时,看到以下页面:
如您所见,在“共同计划者”字段中,用户名显示为<QuerySet [<User: williams>]
>。但是应该将其显示为Co-planner: williams
。
当我点击旅行名称:吉隆坡并转到http://127.0.0.1:8000/triplist/kuala-lumpur/时,会发生相同的问题:
这是我在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()
这是我在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'
这是我在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'),
]
这是我在apps.py
中的代码:
from django.apps import AppConfig
class TripsConfig(AppConfig):
name = 'trips'
这是我在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>
这是我在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 %}
triplist.html和activity.html有什么问题吗?
更新1:顺便说一下,我从下面的链接Auth.User.None when rendering a ManyToManyField中了解了此代码add_coplanner = models.ManyToManyField(User)
。
问这个问题的人也面临着与我相同的问题。他得到类似<User: gg>]>
的信息。建议他重写 str ()方法。但是我不知道该怎么做。
答案 0 :(得分:1)
“活动”模型中的嗨,请添加
def get_cotravellers(self):
return " , ".join([x.username for x in self.add_cotraveller.all()])
在庙宇中称为{{ trip_item.get_cotravellers }}
答案 1 :(得分:1)
您需要在此处进行迭代,因为它是查询集
triplist.html
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>
答案 2 :(得分:0)
models.py
class Song(models.Model):
user = models.ManyToManyField(User)
song_name = models.CharField(max_length=50)
song_duration = models.IntegerField()
def written_by(self):
return ",".join([str(p) for p in self.user.all()])
html 文件
{% for data in data %}
{{data.written_by}} # It returns username
{{data.song_name}}
{{data.song_duration}}
{% endfor %}
像这样关联它会起作用