working, moved stuff around a bit, UUID

core/models/survex.py

@@ -1,3 +1,4 @@
+import uuid
 import math
 import os
 import re
@@ -218,6 +219,14 @@ class SurvexBlock(models.Model):
     Blocks can span several *included survexfile though.
     """
 
+    # This ID is generated as soon as you call SurvexBlock((). So we can use it while assembling the data
+    # into the survexblock without having to keep doing a database transaction
+    _blockid = models.UUIDField(
+        primary_key=False, 
+        default=uuid.uuid4, 
+        editable=False
+    )    
+
     objects = SurvexBlockLookUpManager() # overwrites SurvexBlock.objects and enables lookup()
     name = models.CharField(blank=True, max_length=100)
     title = models.CharField(blank=True, max_length=200)