chipping away bug in personexpedition, remove role

core/models/caves.py

@@ -432,6 +432,10 @@ class LogbookEntry(TroggleModel):
         # #return super(LogbookEntry, self).__init__(*args, **kwargs) # works in py3.5
         # #return TroggleModel.__init__(*args, **kwargs) # fails in py3.5, runtime fail in 3.8
 
+    def cave(self): # Why didn't he just make this a foreign key to Cave ? Replaces __egtattrribute__ sillyness.
+        c = CaveSlug.objects.get(slug=self.cave_slug, primary=True).cave
+        return c
+
     def isLogbookEntry(self): # Function used in templates
         return True