Validations based of the latest entry (#731)

* Validations based of the latest entry [not tested]

* add validation based on latest bed

care/facility/api/serializers/bed.py

@@ -105,6 +105,16 @@ def validate(self, attrs):
                 raise ValidationError({"consultation": "Should be in the same facility as the bed"})
             start_date = attrs["start_date"]
             end_date = attrs.get("end_date", None)
+            existing_qs = ConsultationBed.objects.filter(consultation=consultation, bed=bed)
+            latest_qs = ConsultationBed.objects.filter(consultation=consultation).latest("id")
+            # Validations based of the latest entry
+            if latest_qs.exists():
+                if latest_qs.bed == bed:
+                        raise ValidationError({"bed": "Bed is already in use"})
+                if start_date < latest_qs.start_date:
+                    raise ValidationError({"start_date": "Start date cannot be before the latest start date"})
+                if end_date and end_date < latest_qs.start_date:
+                    raise ValidationError({"end_date": "End date cannot be before the latest start date"})
             existing_qs = ConsultationBed.objects.filter(consultation=consultation)
             # Conflict checking logic
             if existing_qs.filter(start_date__gt=start_date).exists():