修改

src/pages/course/paymentDetail.vue

@@ -461,8 +461,10 @@
     },
     created() {},
     mounted() {
-      if (this.$route.query.ClassId && this.$route.query.School_Id) {
+      if (this.$route.query && this.$route.query.ClassId) {
         this.msg.ClassId = this.$route.query.ClassId;
+      }
+      if (this.$route.query && this.$route.query.School_Id) {
         this.msg.School_Id = this.$route.query.School_Id;
       }
       this.getData();
@@ -477,7 +479,7 @@
       },
       //减法 得实收
       getShiShou(num1, num2) {
-        if (num1!=='' && num2!=='') {
+        if (num1 && num2) {
           return parseInt(num1) - parseInt(num2);
         } else {
           return 0;