django - Django MPTT order_by 错误

Question

模型.py

class Category(MPTTModel):
    name = models.CharField(max_length=100)
    slug = models.SlugField(max_length=200, unique=True)
    parent = models.ForeignKey('self', blank=True, null=True, related_name='child')
    image = models.ImageField(upload_to='gfx/category/image/', blank=True, null=True)
    hidden = models.BooleanField(default=1)
    created = models.DateTimeField(auto_now_add=True)
    changed = models.DateTimeField(auto_now=True)

class MPTTMeta:
    order_insertion_by = ['name',]

我的观点：

categories = Category.tree.filter(level__lte=1)

我将在模板树的第一级按“创建”排序 - 我该怎么做？我试过了：

categories = Category.tree.filter(level__lte=1).order_by('-created')

请帮忙...

Answer 1

你没有父母

from mptt.models import MPTTModel, TreeForeignKey

parent = TreeForeignKey('self', null=True, blank=True, related_name='children')

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