Question

在尝试创建属于组和用户的帖子时运行以下代码时出现此错误：

from django.shortcuts import render, get_object_or_404
from groups.models import Group
from .models import Post
from django.utils import timezone


def create(request, group_id):
    group = get_object_or_404(Group, pk= group_id)
    if request.method == 'POST':
        if request.POST['body'] and request.POST['body']:
            post = Post()
            post.title = request.POST['title']
            post.body = request.POST['body']
            post.pub_date = timezone.datetime.now()
            post.author = request.user
            post.group = group
            post.save()
            return redirect('/groups/' + str(group_id))

        else:
            return render(request, 'groups/detail.html', {'group':group})

    else:
        return render(request, 'groups/detail.html', {'group':group})

澄清一下，Groups是我创建的模型，而不是默认的Django模型，这就是我从groups.models导入它的原因。

这就是我的帖子模型：

from django.db import models
from django.contrib.auth.models import User
from groups.models import Group


class Post(models.Model):
    title = models.CharField(max_length=255, unique=True)
    body = models.TextField()
    likes_total = models.IntegerField(default=0)
    pub_date = models.DateTimeField()
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    group = models.ForeignKey(Group, on_delete=models.CASCADE)


    def __str__(self):
        return self.name

    def summary(self):
        # return the 1st 100 chars
        return self.body[:100]

    def pub_date_pretty(self):
        # strftime is how to break down time
        return self.pub_date.strftime('%b %e %Y')

当我从groups.models文件导入它时，我不知道为什么错误在auth_group表中查找该组！任何帮助都会非常感激！

Answer 1

在previous question中，Post.group指向auth.Group模型。现在您已将其更改为指向groups.Group，您必须创建并运行迁移以更新数据库。

/ posts / create / 18 /中的IntegrityError：表（“auth_group”）中不存在Key（group_id）=（18）

1 个答案: