_deserialize(): fix connection building: use actually created node's ids

Author: wilecoyote2015

NodeGraphQt/base/graph.py

@@ -1392,16 +1392,24 @@ def _deserialize(self, data, relative_pos=False, pos=None, set_parent=True):
                         'output_ports': n_data['output_ports']
                     })
 
+        def get_node_by_id(nid):
+            # if nid referes to a node created during deserialization,
+            #   it may have a new id. get the new id.
+            if nid in nodes:
+                print(f'{nid}, {nodes[nid].id}')
+                nid = nodes[nid].id
+            return self.model.nodes.get(nid)
+
         # build the connections.
         for connection in data.get('connections', []):
             nid, pname = connection.get('in', ('', ''))
-            in_node = self.model.nodes.get(nid)
+            in_node = get_node_by_id(nid)
             if not in_node:
                 continue
             in_port = in_node.inputs().get(pname) if in_node else None
 
             nid, pname = connection.get('out', ('', ''))
-            out_node = self.model.nodes.get(nid)
+            out_node = get_node_by_id(nid)
             if not out_node:
                 continue
             out_port = out_node.outputs().get(pname) if out_node else None