新增业务单据问题

src/views/warehouse/stockOrderNewDistribution.vue

@@ -1119,7 +1119,8 @@ export default {
             }
         },
         invChange() {
-            this.formData.invWarehouseCode = "";
+            if (this.$isNotBlank(this.formData.invWarehouseCode))
+                this.formData.invWarehouseCode = null;
             this.subInvList = [];
             let query = {
                 pcode: this.formData.locStorageCode