text: from django.db import models
  from django.contrib.auth.models import User
  
  class Teacher(models.Model):
      user=models.OneToOneField(User,on_delete=models.CASCADE)
      profile_pic= models.ImageField(upload_to='profile_pic/Teacher/',null=True,blank=True)
      address = models.CharField(max_length=40)
      mobile = models.CharField(max_length=20,null=False)
      status= models.BooleanField(default=False)
      salary=models.PositiveIntegerField(null=True)
      @property
      def get_name(self):
          return self.user.first_name+" "+self.user.last_name
      @property
      def get_instance(self):
          return self
      def __str__(self):
          return self.user.first_name