Fix nodes_count query bind_vars - only add bounds when present

geo_app/schema.py

@@ -541,14 +541,21 @@ class Query(graphene.ObjectType):
             COLLECT WITH COUNT INTO length
             RETURN length
         """
-        cursor = db.aql.execute(aql, bind_vars={
+        bind_vars = {
             'transport_type': transport_type,
             'country': country,
-            'west': west,
+        }
-            'south': south,
+
-            'east': east,
+        # Only add bounds to bind_vars if they are used
-            'north': north,
+        if west is not None and south is not None and east is not None and north is not None:
-        })
+            bind_vars.update({
+                'west': west,
+                'south': south,
+                'east': east,
+                'north': north,
+            })
+
+        cursor = db.aql.execute(aql, bind_vars=bind_vars)
         return next(cursor, 0)
 
     def resolve_hub_countries(self, info):