added net weight, user, date etc. generates new document number with year as a prefix, restarts numbering every year

backend/vehicles/models.py

@@ -13,9 +13,20 @@ class Vehicle(models.Model):
     tare = models.IntegerField(null=True, blank=True)
     tare_date = models.DateTimeField(null=True, blank=True)
     tare_user = models.ForeignKey(User, null=True, blank=True, related_name='user_vehicle_tare', on_delete=models.SET_NULL)
+    tare_manual = models.BooleanField(default=False)
+
     gross = models.IntegerField(null=True, blank=True)
     gross_date = models.DateTimeField(null=True, blank=True)
     gross_user = models.ForeignKey(User, null=True, blank=True, related_name='user_vehicle_gross', on_delete=models.SET_NULL)
+    gross_manual = models.BooleanField(default=False)
+
+    net = models.IntegerField(null=True, blank=True)
+    net_date = models.DateTimeField(null=True, blank=True)
+    net_user = models.ForeignKey(User, null=True, blank=True, related_name='user_vehicle_net', on_delete=models.SET_NULL)
+
+    doc_number = models.CharField(max_length=20, null=True, blank=True, unique=True)
+
+
 
     def __str__(self):
         return f"{self.vehicle_number}"