Fix node reference when changing elements

js/entity/objects/KnotEntity.js

@@ -25,7 +25,7 @@ export default class KnotEntity extends ObjectEntity {
             inputPinEntity.copyTypeFrom(pinReferenceForType)
             outputPinEntity.copyTypeFrom(pinReferenceForType)
         }
-        values["CustomProperties"] = new (ObjectEntity.attributes.CustomProperties)([inputPinEntity, outputPinEntity])
+        values.CustomProperties = new (ObjectEntity.attributes.CustomProperties)([inputPinEntity, outputPinEntity])
         super(values)
     }
 }

js/entity/objects/NiagaraClipboardContent.js

@@ -0,0 +1,30 @@
+import Configuration from "../../Configuration.js"
+import ObjectEntity from "../ObjectEntity.js"
+import ObjectReferenceEntity from "../ObjectReferenceEntity.js"
+import StringEntity from "../StringEntity.js"
+
+export default class NiagaraClipboardContent extends ObjectEntity {
+
+    /**
+     * @param {BlueprintEntity} blueprint
+     * @param {ObjectEntity[]} nodes
+     */
+    constructor(blueprint, nodes) {
+        const typePath = Configuration.paths.niagaraClipboardContent
+        const name = blueprint.takeFreeName("NiagaraClipboardContent")
+        const exportPath = `/Engine/Transient.${name}`
+        let exported = ""
+        for (const node of nodes) {
+            if (node.exported) {
+                exported += node.serialize()
+            }
+        }
+        const result = nodes.filter(n => !n.exported).map(n => n.serialize())
+        super({
+            Class: new ObjectReferenceEntity(typePath),
+            Name: new StringEntity(name),
+            ExportPath: new ObjectReferenceEntity(typePath, exportPath),
+            ExportedNodes: new StringEntity(btoa(exported))
+        })
+    }
+}