您可以随时向模型添加递归函数：

编辑：根据SeomGi Han更正

  def get_all_children（self，include_self = True） 
r = [] 
如果include_self：
 r.append（self）
 for Person.objects.filter（parent = self）：
 _r = c。 get_all_children（include_self = True）
如果0< len（_r）：
 r.extend（_r）
 return r 
 

（如果您有很多递归或数据，请不要使用此...）

仍然建议由errx建议的mptt。

I have this model with a self referencing Foreign Key relation:

class Person(TimeStampedModel):
    name = models.CharField(max_length=32)
    parent = models.ForeignKey('self', null=True, blank=True, related_name='children')

Now I want to get all the multi level children for a person. How do I write a Django query for it? It needs to behave like recursive function.

You can always add a recursive function to your model:

EDIT: Corrected according to SeomGi Han

def get_all_children(self, include_self=True):
    r = []
    if include_self:
        r.append(self)
    for c in Person.objects.filter(parent=self):
        _r = c.get_all_children(include_self=True)
        if 0 < len(_r):
            r.extend(_r)
    return r

(Don't use this if you have a lot of recursion or data ...)

Still recommending mptt as suggested by errx.