Network: Fix #22.

src/View/Network/Table.py

@@ -37,6 +37,8 @@ from PyQt5.QtWidgets import (
     QApplication,
 )
 
+logger = logging.getLogger()
+
 
 class ComboBoxDelegate(QItemDelegate):
     def __init__(self, graph=None, parent=None):
@@ -144,7 +146,7 @@ class EdgeTableModel(PamhyrTableModel):
         try:
             if (self._headers[index.column()] == "node1" or
                     self._headers[index.column()] == "node2"):
-                node = self.graph.node(value)
+                node = self._data.node(value)
                 self._undo.push(
                     SetNodeCommand(
                         self._data,