When I define a custom manager .. Error:Manager isn't accessible via Post instances

Question

我定义了一个继承模型的自定义管理器。经理放入我的模型 'Post'。错误说你不能通过实例调用管理器，但我没有通过实例调用它，当我删除自定义管理器时它工作正常。

models.py:

    class PublishedManager(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(status='Published')

class Post(models.Model):
    STATUS_CHOICES = [
        ('draft','Draft'), ('published','Published'),
        ]
    id = models.UUIDField(primary_key=True,default=uuid.uuid4,editable=False)
    title = models.CharField(max_length=200)
    slug = models.SlugField(max_length=200)
    created = models.DateTimeField(auto_now_add=True)
    published = models.DateTimeField(default=timezone.now)
    updated = models.DateTimeField(auto_now=True)
    status = models.CharField(max_length=10,choices=STATUS_CHOICES,default='Published')
    author = models.ForeignKey(CustomUser,on_delete=models.CASCADE)
    body = models.TextField()
    objects = models.Manager()
    published = PublishedManager()
    

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse("detail", kwargs={"slug":self.slug,"id": self.id})

views.py:

class PostListView(ListView):
    model = Post
    template_name = 'blog/index.html'
    context_object_name='posts'

Error image

Answer 1

我认为你不能有一个与模型字段同名的经理。尝试将其重命名为 published_objects.

当您尝试访问 post.published（一个字段）时发生错误，但 Django 认为您想要访问管理器，因此出现错误。

When I define a custom manager .. Error:Manager isn't accessible via Post instances

When I define a custom manager .. Error:Manager isn't accessible via Post instances

python

django

django-managers