VUE3中Element table表头动态展示合计信息
作者：十方天士
本文主要介绍了在Vue中实现动态合计两个字段并输出摘要信息的方法,通过使用监听器和深度监听,确保当数据变化时能正确更新合计结果,具有一定的参考价值,感兴趣的可以了解一下
一、背景
原型上需要对两个字段动态合计，输出摘要信息
原先想到是的Element的 :summary-method，发现不是动态，所以换监听来实现
二、vue代码
<el-table v-model="loading" :data="itemList">
<el-table-column label="药品名称" prop="drugName" fixed min-width="100px" :show-overflow-tooltip="true"/>
<el-table-column label="规格" prop="drugSpec" :show-overflow-tooltip="true"/>
<el-table-column label="批号" prop="batchNo" :show-overflow-tooltip="true"/>
<el-table-column label="账面数" prop="batchStockDesc" min-width="90px"/>
<el-table-column label="盘存数" align="center">
<el-table-column prop="stocktakeQty" min-width="150px">
<template v-slot="scope">
<el-input-number :disabled="!canEdit"
v-model="scope.row.stocktakeQty"
:min="0"
controls-position="right"
size="small"/>
</template>
</el-table-column>
<el-table-column label="单位" prop="unit" min-width="90px">
<template #default="scope">
<dict-tag :options="bd_plat_drug_unit" :value="scope.row.unit" :showValue="false"/>
</template>
</el-table-column>
<el-table-column prop="stocktakeTinyqty" min-width="150px">
<template v-slot="scope">
<el-input-number :disabled="!canEdit"
v-model="scope.row.stocktakeTinyqty"
:min="0"
controls-position="right"
size="small"/>
</template>
</el-table-column>
<el-table-column label="小单位" prop="tinyUnit" min-width="90px">
<template #default="scope">
<dict-tag :options="bd_plat_drug_unit" :value="scope.row.tinyUnit" :showValue="false"/>
</template>
</el-table-column>
</el-table-column>
<el-table-column label="零售" align="center">
<el-table-column label="零售价" prop="retailPrice" min-width="100px" :show-overflow-tooltip="true"
align="right"/>
<el-table-column label="盘前金额" prop="totalRetail" min-width="100px" :show-overflow-tooltip="true"
align="right"/>
<el-table-column label="盘后金额" prop="afterTotalRetail" min-width="100px" :show-overflow-tooltip="true"
align="right">
<template v-slot="scope">
{{
scope.row.afterTotalRetail = computeTotalMoney(scope.row.stocktakeQty, scope.row.stocktakeTinyqty, scope.row.packageQty, scope.row.retailPrice)
}}
</template>
</el-table-column>
<el-table-column label="成本损溢金额" prop="totalLossoverRetail" min-width="120px" align="right">
<template v-slot="scope">
{{
scope.row.totalLossoverRetail = computeDifferenceMoney(scope.row.stocktakeQty, scope.row.stocktakeTinyqty, scope.row.packageQty, scope.row.retailPrice, scope.row.totalRetail)
}}
</template>
</el-table-column>
</el-table-column>
<el-table-column label="成本" align="center">
<el-table-column label="采购价" prop="purchasePrice" min-width="100px" :show-overflow-tooltip="true"
align="right"/>
<el-table-column label="盘前金额" prop="totalPurchase" min-width="100px" :show-overflow-tooltip="true"
align="right"/>
<el-table-column label="盘后金额" prop="afterTotalPurchase" min-width="100px" :show-overflow-tooltip="true"
align="right">
<template v-slot="scope">
{{
scope.row.afterTotalPurchase = computeTotalMoney(scope.row.stocktakeQty, scope.row.stocktakeTinyqty, scope.row.packageQty, scope.row.purchasePrice)
}}
</template>
</el-table-column>
<el-table-column label="成本损溢金额" prop="totalLossoverPurchase" min-width="120px"
:show-overflow-tooltip="true" align="right">
<template v-slot="scope">
{{
scope.row.totalLossoverPurchase = computeDifferenceMoney(scope.row.stocktakeQty, scope.row.stocktakeTinyqty, scope.row.packageQty, scope.row.purchasePrice, scope.row.totalPurchase)
}}
</template>
</el-table-column>
</el-table-column>
<el-table-column label="生产企业" prop="firmName" min-width="80px" :show-overflow-tooltip="true"/>
<el-table-column label="产地" prop="producerName" min-width="80px" :show-overflow-tooltip="true"/>
<el-table-column label="库位码" prop="locationCode" min-width="100px" :show-overflow-tooltip="true"/>
<el-table-column label="操作" fixed="right" min-width="60px" align="center" v-if="canEdit"
class-name="small-padding fixed-width">
<template #default="scope">
<el-button link type="primary" icon="Delete" title="删除" @click="handleDelete(scope.row)"/>
</template>
</el-table-column>
</el-table>其中代码，赋值给totalLossoverRetail 才能保证，后期监听时数据有发生变化
{{
scope.row.totalLossoverRetail = computeDifferenceMoney(scope.row.stocktakeQty, scope.row.stocktakeTinyqty, scope.row.packageQty, scope.row.retailPrice, scope.row.totalRetail)
}}三、方法代码
watch(itemList, () => {
console.log(itemList.value, 'itemList')
let totalLossoverRetail = 0
let totalLossoverPurchase = 0
itemList.value.forEach(item => {
totalLossoverRetail = Number(totalLossoverRetail) + Number(item.totalLossoverRetail);
totalLossoverPurchase = Number(totalLossoverPurchase) + Number(item.totalLossoverPurchase);
})
sumDescription.value = '成本损溢金额 ' + totalLossoverPurchase + ' 零售损溢金额 ' + totalLossoverRetail
}, {deep: true});其中开启深度监听
四、效果
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