Fixed multi-selection drag and drop of edges.

Author: alelievr

Assets/com.alelievr.NodeGraphProcessor/Editor/Views/PortView.cs

@@ -137,11 +137,11 @@ public override void Disconnect(Edge edge)
 			if (!(edge as EdgeView).isConnected)
 				return ;
 
-			var inputNode = (edge.input as PortView).owner;
-			var outputNode = (edge.output as PortView).owner;
+			var inputNode = (edge.input as PortView)?.owner;
+			var outputNode = (edge.output as PortView)?.owner;
 
-			inputNode.OnPortDisconnected(edge.input as PortView);
-			outputNode.OnPortDisconnected(edge.output as PortView);
+			inputNode?.OnPortDisconnected(edge.input as PortView);
+			outputNode?.OnPortDisconnected(edge.output as PortView);
 
 			edges.Remove(edge as EdgeView);
 		}

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Fixed
 - Fixed fields with [Settings] attribute not showing up with inheritance.
 - Fixed selection still active when selecting nodes without inspector fields.
+- Fixed multi-selection drag and drop of edges.
 
 ### Changed
 - Fields with both attributes [SerializeField] and [ShowInInspector] are now visible in both the node and inspector.