Working. More fault checking.

core/models_survex.py

@@ -35,6 +35,8 @@ class SurvexFile(models.Model):
     
     def SetDirectory(self):
         dirpath = os.path.split(self.path)[0]
+        # pointless search every time we import a survex file if we know there are no duplicates..
+        # don't use this for initial import.
         survexdirectorylist = SurvexDirectory.objects.filter(cave=self.cave, path=dirpath)
         if survexdirectorylist:
             self.survexdirectory = survexdirectorylist[0]