update

controller/heavyMetalController.js

@@ -43,7 +43,13 @@ async function batchCreate(req, res, next) {
         let metals = req.body.metals;
         let ret = [];
         if(metals && metals.length) {
-            ret = await DB.HeavyMetal.insertMany(metals);
+            let arr = [];
+            for (let index = 0; index < metals.length; index++) {
+                const element = metals[index];
+                element.proHaveMetal = !element.proHaveMetal; //要取反，对方传递得true是没有金属
+                arr.push(element);
+            }
+            ret = await DB.HeavyMetal.insertMany(arr);
         } else {
             let datas = req.body.datas;
             let arr = [];

db/models/letianHeavyMetal.js

@@ -12,7 +12,7 @@ const letianHeavyMetalSchema = new Schema({
     },
     proHaveMetal: {
         type: Boolean,
-        comment: "产品有无金属"
+        comment: "产品有无金属" 
     },
     proWeight: {
         type: Number,