text: from django.db import models
  
  # Create your models here.
  class Category(models.Model):
  
      category_name = models.CharField(max_length=50, null= False, blank= False)
      description = models.CharField(max_length=500, null= True, blank= True)
      parent_category = models.ForeignKey('self', null=True, blank=True)
  
      def __str__(self):
          return self.category_name