More optimisation and cleanup (#420)

assets/signals.py

@@ -0,0 +1,15 @@
+import re
+from django.db.models.signals import pre_save
+from django.dispatch.dispatcher import receiver
+from .models import Asset
+
+
+@receiver(pre_save, sender=Asset)
+def pre_save_asset(sender, instance, **kwargs):
+    """Automatically fills in hidden members on database access"""
+    asset_search = re.search("^([a-zA-Z0-9]*?[a-zA-Z]?)([0-9]+)$", instance.asset_id)
+    if asset_search is None:
+        instance.asset_id += "1"
+    asset_search = re.search("^([a-zA-Z0-9]*?[a-zA-Z]?)([0-9]+)$", instance.asset_id)
+    instance.asset_id_prefix = asset_search.group(1)
+    instance.asset_id_number = int(asset_search.group(2))