How to create a parent-child relationship in a model?

Question

Django

I have a Category model

class Categorie(models.Model):
  name = models.CharField('categorie_name', max_length=50)
  parent = models.OneToOneField(Categorie, on_delete=models.CASCADE, blank=True)
  child = models.ManyToManyField(Categorie, blank=True)

And I want to create relation between categories
How can I do this in django?

Answer 1

parent = models.ForeignKey('self', blank=True, null=True, on_delete=models.SET_NULL, related_name='child')

Access to child will be possible throughObject.child.all()

Answer 2

In general, there is a good library link to its dock django mptt just creates these relationships + a bunch of built-in methods