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问NoReverseMatch at /purchase_form/ Reverse 'purchase_form‘找不到。'purchase_form‘不是一个有效的视图函数或模式名称
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Stack Overflow用户

提问于 2021-02-24 15:32:56

回答 1查看 257关注 0票数 0

#models.py

from django.db import models
from django.utils import timezone
from django.urls import reverse,reverse_lazy,resolve
# Create your models here.

class Purchase(models.Model):
    purchase_date = models.DateField()
    components = models.ForeignKey(Components,on_delete=models.CASCADE)
    quantity = models.PositiveIntegerField()
    remarks = models.TextField(max_length=500,blank=True,null=True)

    def __str__(self):
        return str(self.pk)

#views.py
from django.shortcuts import render
from django.urls import reverse_lazy
from django.views.generic import (View, ListView, DetailView, CreateView, UpdateView, DeleteView)
from myinventory.models import Purchase
# Create your views here.

class PurchaseCreateView(CreateView):
    model = Purchase
    fields = '__all__'
    success_url = reverse_lazy("purchase_form")

def get_context_data(self,**kwargs):
    context = super().get_context_data(**kwargs)
    context['purchases'] = Purchase.objects.all()
    return context

project urls.py
from django.contrib import admin
from django.urls import path,include

urlpatterns = [

    path('admin/', admin.site.urls),
    path('',include('myinventory.urls','myinventory')),

]

app urls.py
from django.urls import path,reverse_lazy
from django.views.generic import CreateView
from myinventory import views


app_name = 'myinventory'

urlpatterns = [
        path('purchase_form/', views.PurchaseCreateView.as_view(),name="purchase_form"),
]


purchase_form.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Purchase</title>
  </head>
  <body>
    <form method="post">
      {% csrf_token %}
      {{ form.as_p }}
      <input type="submit" value="Submit">

      {% for purchase in purchases %}
      <h2>{{ purchase.purchase_date }}</h2>
      <h2>{{ purchase.components }}</h2>
      <h2>{{ purchase.quantity }}</h2>
      <h2>{{ purchase.remarks }}</h2>
      {% endfor %}
    </form>
  </body>
</html>

admin.py
from django.contrib import admin
from myinventory.models import *


# Register your models here.


admin.site.register(Purchase)

Traceback

I'm getting following error:
Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/purchase_form/

Django Version: 3.1.7
Python Version: 3.9.1
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'myinventory']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback (most recent call last):

文件"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\core\handlers\exception.py"，第47行，在内部响应=get_response(请求)文件"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\core\handlers\base.py"，行181中，在_get_response response = wrapped_callback(request，*callback_args )中)文件"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\views\generic\base.py"，第70行，在调度返回处理程序(请求，*args，*args)中，查看返回self.dispatch(请求、*args、**kwargs)文件"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\views\generic\base.py"，第98行。**kwargs)文件"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\views\generic\edit.py"，行172，在post返回超级().post(请求，*args，**kwargs)文件"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\views\generic\edit.py"，第142行，在post返回"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\views\generic\edit.py"，(表单)self.form_valid文件第126行，在form_valid返回超级().form_valid(表单)文件第57行，在"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\views\generic\edit.py"，返回HttpResponseRedirect(self.get_success_url())文件HttpResponseRedirect行11m2，在get_success_url if self.success_url: File self.success_url第135行，在包装器 res = func(*self.__args，文件"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\urls\base.py"，第87行，反向返回iri_to_uri(resolver._reverse_with_prefix(view，前缀，*args，**kwargs))文件"C:\Users\Hp\anaconda3\envs\MyRLXEnv\lib\site-packages\django\urls\resolvers.py"，行685，在_reverse_with_prefix raise (Msg)中

 Exception Type: NoReverseMatch at /purchase_form/
    Exception Value: Reverse for 'purchase_form' not found. 'purchase_form' is not a valid view function or pattern name.

django

回答 1

Stack Overflow用户

发布于 2021-02-24 15:42:55

当您在应用程序的app_name‘s urls.py 命名空间中设置url时，即当您想要反转url时，应该使用<app_name>:<url_name>。因此，在您看来，PurchaseCreateView而不是：

success_url = reverse_lazy("purchase_form")

你应该写：

success_url = reverse_lazy("myinventory:purchase_form")

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/66354013

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问NoReverseMatch at /purchase_form/ Reverse 'purchase_form‘找不到。'purchase_form‘不是一个有效的视图函数或模式名称
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