【发布时间】：2021-11-24 07:54:31
【问题描述】：
让我快速解释一下我要做什么。
所以我正在制作一个基于 Django 的小型会议管理，其中可以有多个会议，一个会议可以有多个演讲，每个演讲会有一定数量的演讲者和参与者。
我可以列出会议并提供删除和编辑会议的选项。
问题：
我想要一个选项，我点击一个会议，它会显示该会议的会谈列表。 但是当我点击会议时它显示以下错误。
NoReverseMatch at /Big Data/talks/
Reverse for 'conferenceedit' with arguments '('',)' not found. 1 pattern(s) tried: ['(?P<id>[^/]+)/edit$']
Request Method: GET
Request URL: http://127.0.0.1:8000/Big%20Data/talks/
Django Version: 3.2.4
Exception Type: NoReverseMatch
Exception Value:
Reverse for 'conferenceedit' with arguments '('',)' not found. 1 pattern(s) tried: ['(?P<id>[^/]+)/edit$']
Exception Location: E:\python\PYTHON and GIT\lib\site-packages\django\urls\resolvers.py, line 694, in _reverse_with_prefix
Python Executable: E:\python\PYTHON and GIT\python.exe
Python Version: 3.9.1
Python Path:
['D:\\DjangoConferenceManagementSystem\\mysite',
'E:\\python\\PYTHON and GIT\\python39.zip',
'E:\\python\\PYTHON and GIT\\DLLs',
'E:\\python\\PYTHON and GIT\\lib',
'E:\\python\\PYTHON and GIT',
'C:\\Users\\AKS\\AppData\\Roaming\\Python\\Python39\\site-packages',
'E:\\python\\PYTHON and GIT\\lib\\site-packages',
'E:\\python\\PYTHON and GIT\\lib\\site-packages\\pip-21.0.1-py3.9.egg',
'E:\\python\\PYTHON and GIT\\lib\\site-packages\\win32',
'E:\\python\\PYTHON and GIT\\lib\\site-packages\\win32\\lib',
'E:\\python\\PYTHON and GIT\\lib\\site-packages\\Pythonwin']
Server time: Sun, 03 Oct 2021 15:47:10 +0000
我已包含以下代码来支持该论点。
模型.PY
from django.db import models
from django.db.models.fields import CharField
from django.utils import timezone
# Create your models here.
class ConferenceModel(models.Model):
conference_title = models.TextField(null=False,primary_key=True)
conference_description = models.CharField(max_length=1000,null=False)
conference_start_date = models.DateField(null=False)
conference_end_date = models.DateField(null=False)
class TalkModel(models.Model):
talk_conference_title = models.ForeignKey(ConferenceModel,on_delete=models.CASCADE)
talk_title = models.TextField(null=False,primary_key=True)
talk_description = models.CharField(max_length=100,null=False)
talk_duration = models.DecimalField(max_digits=2,decimal_places=1)
talk_time = models.DateTimeField(null=False)
class SpeakerModal(models.Model):
speaker_talk_title = models.ForeignKey(TalkModel,on_delete=models.CASCADE)
speaker_username = models.CharField(max_length=25,null=False)
speaker_email = models.EmailField(max_length=100,primary_key=True,null=False)
class ParticipantModel(models.Model):
participant_talk_title = models.ForeignKey(TalkModel,on_delete=models.CASCADE)
participant_username = models.CharField(max_length=25,null=False)
participant_email = models.EmailField(max_length=100,primary_key=True,null=False)
URLS.PY
from django.contrib import admin
from django.urls import path
from myapp import views
urlpatterns = [
path('',views.conferenceView,name='conference'),
path('delete/<str:id>',views.conferencedelete,name='conferencedelete'),
path('<str:id>/edit',views.conferenceedit,name='conferenceedit'),
path('<str:id>/talks/',views.talkView,name='talks'),
path('admin/', admin.site.urls),
]
VIEWS.PY
from django.shortcuts import render
from django import forms
from django.shortcuts import render,HttpResponsePermanentRedirect,HttpResponse
from myapp.forms import ConferenceForm,TalkForm,SpeakerForm,ParticipantForm
from myapp.models import ConferenceModel,TalkModel,SpeakerModal,ParticipantModel
# Create your views here.
def conferenceView(request):
if request.method == 'POST':
conferenceform = ConferenceForm(request.POST)
if conferenceform.is_valid():
conferenceform.save()
conferenceform = ConferenceForm()
else:
conferenceform = ConferenceForm()
conference = ConferenceModel.objects.all()
return render(request,'myapp/conference.html',{'conference':conference,'conferenceform':conferenceform})
def conferenceedit(request,id):
if request.method == 'POST':
uniqueconferencetitle = ConferenceModel.objects.get(pk=id)
requestconferencedetails = ConferenceForm(request.POST,instance=uniqueconferencetitle)
if requestconferencedetails.is_valid():
requestconferencedetails.save()
return HttpResponsePermanentRedirect('/')
else:
uniqueconferencetitle = ConferenceModel.objects.get(pk=id)
requestconferencedetails = ConferenceForm(instance=uniqueconferencetitle)
return render(request,'myapp/conferenceedit.html',{'requestconferencedetails':requestconferencedetails})
def conferencedelete(request,id):
if request.method == 'POST':
conferencedelete = ConferenceModel.objects.get(pk=id)
conferencedelete.delete()
return HttpResponsePermanentRedirect('/')
def talkView(request,id):
talk = ConferenceModel.objects.get(pk=id)
conferencetalks = talk.talkmodel_set.all()
return render(request,'myapp/talks.html',{'conferencetalks':conferencetalks})
FORMS.PY
from django import forms
from django.db import models
from django.db.models import fields
from django.forms import widgets
from myapp.models import ConferenceModel,TalkModel,SpeakerModal,ParticipantModel
class ConferenceForm(forms.ModelForm):
class Meta:
model = ConferenceModel
fields = ['conference_title','conference_description','conference_start_date','conference_end_date']
widgets = {
'conference_title' : forms.TextInput(attrs={'class':'form-control '}),
'conference_description' : forms.TextInput(attrs={'class':'form-control'}),
'conference_start_date' : forms.TextInput(attrs={'class':'form-control','placeholder':'YYYY-MM-DD'}),
'conference_end_date' : forms.TextInput(attrs={'class':'form-control','placeholder':'YYYY-MM-DD'})
}
class TalkForm(forms.ModelForm):
class Meta:
model = TalkModel
fields = ['talk_conference_title','talk_title','talk_description','talk_duration','talk_time']
widgets = {
'talk_conference_title' : forms.HiddenInput,
'talk_title' : forms.TextInput(attrs={'class':'form-control '}),
'talk_description' : forms.TextInput(attrs={'class':'form-control '}),
'talk_duration' : forms.TextInput(attrs={'class':'form-control '}),
'talk_time' : forms.TextInput(attrs={'class':'form-control '}),
}
class SpeakerForm(forms.ModelForm):
class Meta:
model = SpeakerModal
fields = ['speaker_talk_title','speaker_username','speaker_email']
widgets = {
'speaker_talk_title' : forms.HiddenInput,
'speaker_username' : forms.TextInput(attrs={'class':'form-control '}),
'speaker_email' : forms.TextInput(attrs={'class':'form-control '})
}
class ParticipantForm(forms.ModelForm):
class Meta:
model = ParticipantModel
fields = ['participant_talk_title' , 'participant_username' , 'participant_email']
widgets = {
'participant_talk_title' : forms.HiddenInput,
'participant_username' : forms.TextInput(attrs={'class':'form-control '}),
'participant_email' : forms.TextInput(attrs={'class':'form-control '})
}
会议.HTML
{% extends 'myapp/base.html' %}
{% block content %}
<div class="col-sm-5 container">
<h4 class="alert alert-info">Add a new conference</h4>
<form class="form-control" method="POST">
{% csrf_token %}
{{ conferenceform }}
<p></p>
<input type="submit" class="btn btn-success " value="ADD" id="add">
</form>
</div>
<div class="container mt-3">
<h4 class="alert alert-info text-center">
Here is the list of confrences
</h4>
<table class="table table-hover">
<th class="thead-dark">
<tr>
<th scope="col">Title</th>
<th scope="col">Description</th>
<th scope="col">Start Date</th>
<th scope="col">End Date</th>
<th scope="col">Options</th>
</tr>
</th>
{% for conferences in conference %}
<tr>
<th scope="col"><a href="{% url 'talks' conferences.conference_title %}">{{conferences.conference_title}}</a></th>
<th scope="col">{{conferences.conference_description}}</th>
<th scope="col">{{conferences.conference_start_date}}</th>
<th scope="col">{{conferences.conference_end_date}}</th>
<td>
<a href="{% url 'conferenceedit' conferences.conference_title %}" class="btn btn-danger btn-sm">Edit</a>
<form action="{% url 'conferencedelete' conferences.conference_title %}" method="POST" class="d-inline">
{% csrf_token %}
<input type="submit" value="Delete" class="btn btn-danger btn-sm">
</form>
</td>
</tr>
{% endfor %}
</table>
</div>
{% endblock content %}
TALKS.HTML
{% extends 'myapp/base.html' %}
{% block content %}
<div class="container mt-3">
<h4 class="alert alert-info text-center">
Here is the list of Talks under this conference
</h4>
<table class="table table-hover">
<th class="thead-dark">
<tr>
<th scope="col">Talk Title</th>
<th scope="col">Talk Description</th>
<th scope="col">Talk Duration </th>
<th scope="col">Talk Time</th>
<th scope="col">Options</th>
</tr>
</th>
{% for talkss in conferencetalks %}
<tr>
<th scope="col">{{talkss.talk_title}}</th>
<th scope="col">{{talkss.talk_description}}</th>
<th scope="col">{{talkss.talk_duration}}</th>
<th scope="col">{{talkss.talk_time}}</th>
<!-- <td>
<a href="{% url 'conferenceedit' conferences.conference_title %}" class="btn btn-danger btn-sm">Edit</a>
<form action="{% url 'conferencedelete' conferences.conference_title %}" method="POST" class="d-inline">
{% csrf_token %}
<input type="submit" value="Delete" class="btn btn-danger btn-sm">
</form>
</td> -->
</tr>
{% endfor %}
</table>
</div>
{% endblock content %}
【问题讨论】：
-
错字：在
talks.html中你写{% url 'conferenceedit' conferences.conference_title %}但循环变量是talkss... 即它应该是{% url 'conferenceedit' talkss.conference_title %}（注意：请一致且更好地命名事物，不要反转单数和复数，可以防止此类错误）
标签： python django django-models django-forms django-templates