Fix test selector crash

Fixes #12

commander/gui/overview.py

@@ -15,9 +15,11 @@ from traitlets.config.application import TRAITLETS_APPLICATION_RAISE_CONFIG_FILE
 from commander.gui import utils
 
 
+NodeIdRole = Qt.ItemDataRole.UserRole
+
+
 class OverviewModel(QAbstractTableModel):
 
-    NodeIdRole = Qt.ItemDataRole.UserRole
     COLUMNS = ["nodeid", "tag", "when", "outcome", "message"]
     node_ids_loaded = pyqtSignal(list)
     tag_mapping_loaded = pyqtSignal(dict)
@@ -76,7 +78,7 @@ class OverviewModel(QAbstractTableModel):
 
         if key == 'nodeid' and role == Qt.ItemDataRole.DisplayRole:
             return self._data_nodeid(report, short=True)
-        elif key == 'nodeid' and role == self.NodeIdRole:
+        elif key == 'nodeid' and role == NodeIdRole:
             return self._data_nodeid(report, short=False)
         elif key == 'tag' and role == Qt.ItemDataRole.DisplayRole:
             return self._data_tag(report)
@@ -211,7 +213,7 @@ class OverviewView(QTableView):
             index.parent(),
         )
 
-        nodeid = self._filter_model.data(nodeid_index, self.overview_model.NodeIdRole)
+        nodeid = self._filter_model.data(nodeid_index, NodeIdRole)
         assert nodeid
         self.test_activated.emit(nodeid)
 
@@ -231,8 +233,8 @@ class OverviewView(QTableView):
     def on_test_changed(self, name: str) -> None:
         idx = self.overview_model.find_by_short_nodeid(name)
         self.selectRow(idx.row())
-        node_id = self._filter_model.data(idx, self._filter_model.NodeIdRole)
-        assert note_id
+        node_id = self.overview_model.data(idx, NodeIdRole)
+        assert node_id
         self.test_activated.emit(node_id)
         self.setFocus()