Question

我的代码是这样的：

def post_detail(request, year, month, day, slug):
      print(month, type(month))
      post = get_object_or_404(Post,
                               slug=slug,
                               status='published',
                               published__year=year
                              )
      print(post.published.month, type(post.published.month))
      return render(request, 'blog/post/detail.html', {'post': post})

当我调用该视图时的输出：

7 <class 'int'> 7 <class 'int'>

这表明月份是7（int），但是当我像这样修改它时：

def post_detail(request, year, month, day, slug):
      print(month, type(month))
      post = get_object_or_404(Post,## Heading ##
                               slug=slug,
                               status='published',
                               published__year=year,
                               published__month=month
                              )
      print(post.published.month, type(post.published.month))
      return render(request, 'blog/post/detail.html', {'post': post})

我现在从get_object_or_404得到404。奇怪的是，我在本地计算机上具有相同的代码，并且可以正常工作。那是在服务器上。

我的模型是这样的：

class PublishedManager(models.Manager):

def get_queryset(self):
    return super().get_queryset().filter(status='published')


class Post(models.Model):

    STATUS_CHOICES = (
        ('draft', 'Roboczy'),
        ('published', 'Opublikowany'),
    )       

    title = models.CharField(max_length=250)
    slug = models.SlugField(max_length=250, unique_for_date='published')                           
    author = models.ForeignKey(User, related_name='posts', on_delete=models.CASCADE)                              

    body = models.TextField()
    published = models.DateTimeField(default=timezone.now)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    status = models.CharField(max_length=10, choices=STATUS_CHOICES, default='draft')

    objects = models.Manager()
    active = PublishedManager()

    def get_absolute_url(self):
        date = timezone.localdate(self.published)
        return reverse('blog:post_detail',
                       args=[date.year,
                             date.strftime('%m'),
                             date.strftime('%d'),
                             self.slug])

    class Meta:
        ordering = ('-published',)

    def __str__(self):
        return f'{self.title} by {self.author.username.title()}'

我做了makemigrations和migrate，有人知道这里会发生什么吗？

编辑：

我做了一个非常相似的过滤器查询，原始的sql查询是这样的： SELECT `blog_post`.`id`, `blog_post`.`title`, `blog_post`.`slug`, `blog_post`.`author_id`, `blog_post`.`body`, `blog_post`.`published`, `blog_post`.`created`, `blog_post`.`updated`, `blog_post`.`status` FROM `blog_post` WHERE (EXTRACT(DAY FROM CONVERT_TZ(`blog_post`.`published`, 'UTC', 'Europe/Warsaw')) = 23 AND EXTRACT(MONTH FROM CONVERT_TZ(`blog_post`.`published`, 'UTC', 'Europe/Warsaw')) = 7 AND `blog_post`.`published` BETWEEN 2017-12-31 23:00:00 AND 2018-12-31 22:59:59.999999 AND `blog_post`.`slug` = grgregthyrj) ORDER BY `blog_post`.`published` DESC;

当我在数据库上执行该操作时，它给了我错误的语法。然后，我在其上使用了https://www.piliapp.com/mysql-syntax-check/。它也给了我错误的语法。 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '23:00:00 AND 2018-12-31 22:59:59.999999 AND blog_post . {= grgregthyrj) OR' at line 1

然后我删除了BETWEEN，就像这样：

SELECT `blog_post`.`id`, `blog_post`.`title`, `blog_post`.`slug`, `blog_post`.`author_id`, `blog_post`.`body`, `blog_post`.`published`, `blog_post`.`created`, `blog_post`.`updated`, `blog_post`.`status` FROM `blog_post` WHERE (EXTRACT(DAY FROM CONVERT_TZ(`blog_post`.`published`, 'UTC', 'Europe/Warsaw')) = 23 AND EXTRACT(MONTH FROM CONVERT_TZ(`blog_post`.`published`, 'UTC', 'Europe/Warsaw')) = 7 AND `blog_post`.`slug` = grgregthyrj) ORDER BY `blog_post`.`published` DESC;

根据该工具，它是正确的。也许是问题所在？

Django get_object_or_404按日期获取时引发异常

0 个答案: