python - 我在 django 中不断收到以下错误 : "UnboundLocalError at/myapp/"

Question

我在 django python 中遇到这个错误:

“/myapp/处出现 UnboundLocalError” 赋值前引用的局部变量“album”

我在 models.py 文件中创建了一个类并在 View 中导入，但遇到了此错误

这是两个文件的完整代码:

模型.py

from django.db import models

from django.db import models

class album(models.Model):
    artist = models.CharField(max_length=250)
    title = models.CharField(max_length=500)
    gender = models.CharField(max_length=100)

    def __str__(self):
        return self.artist+'--'+self.title

views.py

from django.http import HttpResponse
from .models import album

def myapp(request):
   all_albums = album.objects.all()
   title = album.artist
   html = ''
   for album in all_albums:
      url = '/myapp/' + str(album.id) + '/'
      html += '<a href="' + url + '">' + title + '</a><br>'
   return HttpResponse(html)

Answer 1

在循环内移动标题并更好地使用循环变量名称，而不是像模型

html = ''
for album_data in all_albums:
    url = '/myapp/' + str(album_data.id) + '/'
    title = album_data.artist
    html += '<a href="' + url + '">' + title + '</a><br>'
return HttpResponse(html)