added print, download as pdf. no puppeteer, we'll see

backend/vehicles/models.py

@@ -8,11 +8,12 @@ from api.models import User
 
 # Create your models here.
 class Vehicle(models.Model):
-    vehicle_number = models.CharField(max_length=15, unique=True)
+    vehicle_number = models.CharField(max_length=15)
     trailer1_number = models.CharField(max_length=15, null=True, blank=True)
     trailer2_number = models.CharField(max_length=15, null=True, blank=True)
     driver_pid = models.CharField(max_length=50, null=True, blank=True)
-    
+    driver_name = models.CharField(max_length=50, null=True, blank=True)
+
     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)
@@ -35,7 +36,19 @@ class Vehicle(models.Model):
 
     doc_number = models.CharField(max_length=20, null=True, blank=True, unique=True)
 
+    is_void = models.BooleanField(default=False)
+    void_date = models.DateTimeField(null=True, blank=True)
+    void_user = models.ForeignKey(User, null=True, blank=True, related_name='user_vehicle_void', on_delete=models.SET_NULL)
+    void_reason = models.CharField(max_length=255, null=True, blank=True)
 
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(
+                fields=['vehicle_number'],
+                condition=models.Q(doc_number__isnull=True),
+                name='unique_active_vehicle_number',
+            ),
+        ]
 
     def __str__(self):
         return f"{self.vehicle_number}"