update

controller/heavyMetalController.js

@@ -14,12 +14,18 @@
 async function batchCreate(req, res, next) {
     try {
         let metals = req.body.metals;
-        let arr = [];
-        for (let index = 0; index < metals.length; index++) {
-            const element = metals[index];
-            arr.push({data: element});
+        let ret = [];
+        if(metals && metals.length) {
+            ret = await DB.HeavyMetal.insertMany(metals);
+        } else {
+            let datas = req.body.datas;
+            let arr = [];
+            for (let index = 0; index < datas.length; index++) {
+                const element = datas[index];
+                arr.push({data: element});
+            }
+            ret = await DB.HeavyMetal.insertMany(arr);
         }
-        let ret = await DB.HeavyMetal.insertMany(arr);
         return res.sendData(ret);
     } catch (error) {
         res.sendError(error);