from django.db import models # Create your models here. class Vehicle(models.Model): vehicle_number = models.CharField(max_length=15, unique=True) def __str__(self): return f"{self.vehicle_number}" class VehicleExtra(models.Model): vehicle = models.OneToOneField( Vehicle, on_delete=models.CASCADE, related_name="extra" ) data = models.JSONField(default=dict)