【问题标题】：why this happening<django.db.models.query_utils.DeferredAttribute object at 0x00000256CA7C05E0>为什么会发生这种情况<django.db.models.query_utils.DeferredAttribute object at 0x00000256CA7C05E0>
【发布时间】：2022-01-17 15:23:52
【问题描述】：

views.py

得到别的东西在输出中而不是其中存在的值我正在尝试但没有给出答案请给我一些建议我认为这样的错误发生在:(instance=Task)

from django.shortcuts import render
from django.http import *
from  MYapp.models import *
from .form import *

def venue(request):
  venue_list = Task.objects.all()

  return render(request,'MYapp/venue.html',{'venue_list': venue_list})

def navebar(request):

  return render(request,'MYapp/navebar.html')


def db(request,db_id):
  venues = Task.objects.get(pk=db_id)
  return render(request,'MYapp/db.html',{'venues': venues})

def search(request):
  if request.method =="POST":
      searched = request.POST.get('searched', False)
      Tasks =Task.objects.filter( firstname__contains = searched)
      return render(request,'MYapp/search.html',{'searched':searched, 'Tasks':Tasks})    
  else:
      return render(request,'MYapp/search.html',{})    

def update(request,db_id):
  venues = Task.objects.get(pk=db_id)
  form = TaskForm(request.POST or None, instance=Task)
  return render(request,'MYapp/update.html',{'venues': venues,'form':form})

【问题讨论】：

请尝试写一个更清晰的问题。并使用标点符号。
不好意思这是我第一次注意文字吧

标签： django django-views django-database

【解决方案1】：

分配一个变量而不是类

 def update(request,db_id):
    venues = Task.objects.get(pk=db_id)
    form = TaskForm(request.POST or None, instance=Task)
    return render(request,'MYapp/update.html',{'venues': 
    venues,'form':form})

这样做

 def update(request,db_id):
    venues = Task.objects.get(pk=db_id)
    form = TaskForm(request.POST or None, instance=venues )
    return render(request,'MYapp/update.html',{'venues': 
    venues,'form':form})

【讨论】：