text: from django.db import models
  
  
  class Device(models.Model):
      device_name = models.TextField(max_length=50, unique=True, null=False, blank=False)
      sn = models.TextField(max_length=50, unique=True, null=False, blank=False)
      vc = models.TextField(max_length=50, unique=True, null=False, blank=False)
      ac = models.TextField(max_length=50, unique=True, null=False, blank=False)
      vkey = models.TextField(max_length=50, unique=True, null=False, blank=False)
  