编辑时默认一条数据

src/views/book/book-list.vue

@@ -459,6 +459,12 @@ export default {
                 item.price = item.unitPrice
                 item.englishProductName = item.englishName
               })
+              if(data.rmbList.length == 0){
+                data.rmbList = [{}]
+              }
+              if(data.usdList.length == 0){
+                data.usdList = [{}]
+              }
               this.$refs.addBookDrawer.rmbList = data.rmbList
               this.$refs.addBookDrawer.usdList = data.usdList
             }else {