工序只能有一个下一道工序。

src/views/base/craftManagement/route/bindProcess.vue

@@ -342,11 +342,23 @@ const { addEdges, vueFlowRef, onEdgeUpdateEnd, applyEdgeChanges, fitView } =
 const { onDragOver, onDrop, onDragLeave, isDragOver, onDragStart } =
   useDragAndDrop();
 // onConnect(addEdges);
-const onConnectMethod = (edge) => {
-  edge.type = "smoothstep";
-  edge.markerEnd = "arrowclosed";
-  edge.style = { strokeWidth: "2" };
-  addEdges(edge);
+const onConnectMethod = (toConnectedEdge) => {
+  let hasSourceEdge = false;
+  for (const edge of edges.value) {
+    if (edge.source === toConnectedEdge.source) {
+      hasSourceEdge = true;
+      break;
+    }
+  }
+
+  if (!hasSourceEdge) {
+    toConnectedEdge.type = "smoothstep";
+    toConnectedEdge.markerEnd = "arrowclosed";
+    toConnectedEdge.style = { strokeWidth: "2" };
+    addEdges(toConnectedEdge);
+  } else {
+    ElMessage.warning("工序只能有一个下一道工序！");
+  }
 };
 
 const flowData = reactive({ edges: [], nodes: [] });