Question

我所拥有的是一个基本论坛。现在，我尝试做的是从董事会内的主题中检索帖子。每当我点击localhost:8000/boards/1/topics/1时，我都会得到以下信息：

没有主题与给定的查询匹配

我怀疑get参数可能是罪魁祸首，但我不确定我必须指定哪些参数才能检索所需的对象。以下是完整的代码流程，请指教。

urls.py：

path('boards/<board_id>/topics/<topic_id>', views.topic_posts, name = 'topic_posts')

views.py：

def topic_posts(request, board_id, topic_id):
    topic = get_object_or_404(Topic, board_id = board_id, topic_id = topic_id)
    return render(request, 'topic_posts.html', {'topic': topic})

模型：

from django.db import models
from django.contrib.auth.models import User
from datetime import datetime

# Create your models here.

class Board(models.Model):
    '''
    id auto generated
    '''
    name = models.CharField(max_length = 30, unique = True)
    description = models.CharField(max_length = 100)

    def __str__(self):
        return self.name


class Topic(models.Model):
    subject = models.CharField(max_length = 255, default = '')
    last_updated = models.DateTimeField(default = datetime.now(), blank = True)
    board = models.ForeignKey(Board, related_name = 'topics', on_delete = models.CASCADE)
    starter = models.ForeignKey(User, related_name = 'topics', on_delete = models.CASCADE)


class Post(models.Model):
    message = models.TextField(max_length = 4000, default = '')
    topic = models.ForeignKey(Topic, related_name = 'posts', on_delete = models.CASCADE)
    created_at = models.DateTimeField(default = datetime.now(), blank = True)
    updated_at = models.DateTimeField(null = True, default = datetime.now(), blank = True)
    created_by = models.ForeignKey(User, related_name = 'posts', on_delete = models.CASCADE)
    updated_by = models.ForeignKey(User, null = True, related_name = '+', on_delete = models.CASCADE)

祝福，谢谢您的阅读！

Answer 1

urls.py

url(r'^boards/(?P<pk>\d+)/topics/(?P<topic_pk>\d+)/$', views.topic_posts, name='topic_posts'),

http://127.0.0.1:8000/boards/1/topics/84/

数据库id中的

从84（在我的数据库中）开始，而不是1。因此，请从头开始检查数据库ID。

Django get（）模型查询不返回对象

1 个答案:

urls.py