Merge branch 'feature/Add_arbor_support' of...

Merge branch 'feature/Add_arbor_support' of https://devhub.vr.rwth-aachen.de/VR-Group/in-situ-pipeline/access-node into feature/Add_arbor_support

access_node/controllers/nest_controller.py

@@ -185,19 +185,18 @@ def nest_get_neuron_properties(gids=None):  # noqa: E501
     else:
         cur.execute("Select * FROM nest_neuron WHERE id IN %s", (tuple(gids),))
     
-    con.close()
-
+    nest_properties = []
     properties = np.array(cur.fetchall())
+    if properties.size != 0:
         properties = np.delete(properties, [1,2], 1)
-
-    nest_properties = []
         for k in range(len(properties[:,0])):
             props = {}
             id = properties[k,0]
             for i in range(1, len(colnames)):
-            props.update({colnames[i]: properties[k,i]})
-        nest_properties.extend(NestNeuronProperties(id, props))
+                props.update({colnames[i]: properties[k,i] if properties[k,i] != None else []})
+            nest_properties.append(NestNeuronProperties(id, props))
 
+    con.close()
     return nest_properties