Vuejs2-如何从方法调用过滤器函数
Vuejs2-如何从方法调用过滤器函数
提问于 2018-06-04 20:34:13
我使用"moneyFormat“过滤器来格式化货币值。它正在格式化已经定义好的值。我想格式化动态值。因此，我通过一个名为"displayValue“的方法调用了过滤器函数，但我得到了错误
并且给定的输入字段也不更新。
下面是我的代码：
<template>
<b-card>
<div class="panel-body" id="app">
<table class="table table-hover">
<thead>
<tr>
<th style="width: 20px;">No.</th>
<th style="width: 330px;">Description</th>
<th style="width: 130px;" class="text-right">Charges</th>
<th style="width: 130px;">Total</th>
<th style="width: 130px;"></th>
</tr>
</thead>
<tbody>
<tr v-for="(row, index) in rows" :key="row.qty">
<td>
{{ index +1 }}
</td>
<td>
<select name="" id="" class="form-control" v-model="row.billChgDesc">
<option v-for="option in billChgDescOpt" v-bind:value="option.value"
:key="option.value"> {{ option.text }}
</option>
</select>
</td>
<td>
<input @input="displayValue" class="form-control text-right" type="text" v-model="row.charges" data-type="currency" v-validate="'required'" :name="'charges' + index">
<span v-show="vErrors.has('charges' + index)" class="is-danger">{{ vErrors.first('charges' + index) }}</span>
<td>
<input class="form-control text-right" :value="row.qty * row.charges | moneyFormat" number readonly />
<input type="hidden" :value="row.qty * row.charges * row.tax / 100" number/>
</td>
<td>
<button class="btn btn-primary btn-sm" @click="addRow(index)"><i class="fa fa-plus"></i></button>
<button class="btn btn-danger btn-sm" @click="removeRow(index)"><i class="fa fa-minus"></i></button>
</td>
</tr>
</tbody>
<tfoot>
<tr>
<td colspan="3" class="text-right">DELIVERY</td>
<td colspan="1" class="text-right"><input class="form-control text-right" v-model="delivery" number/></td>
<td></td>
</tr>
</tfoot>
</table>
</div>
</b-card>
</template>
<script>
import Vue from 'vue'
import accounting from 'accounting'
export default {
filters:{
moneyFormat: function (val){
if (val > 0) {
return accounting.formatMoney(val, " ₹ ", 2, ",", ".");
}
}
},
data: function () {
return {
billChgDescOpt: [
{ value: '', text: 'Select' },
{ value: 'M', text: 'Maintenance Fee'},
{ value: 'W', text: 'Water Charges'},
{ value: 'P', text: 'Penalty Fee'},
],
rows: [
{qty: 5, billChgDesc: '', charges: 55.20, tax: 10},
{qty: 19, billChgDesc: '', charges: 1255.20, tax: 20},
],
grandtotal: 0,
delivery: 40
}
},
computed: {
total: function () {
var t = 0;
$.each(this.rows, function (i, e) {
t += accounting.unformat(e.total, ",");
});
return t;
},
taxtotal: function () {
var tt = 0;
$.each(this.rows, function (i, e) {
tt += accounting.unformat(e.tax_amount, ",");
});
return tt;
}
},
methods: {
addRow: function (index) {
try {
this.rows.splice(index + 1, 0, {});
} catch(e)
{
console.log(e);
}
},
removeRow: function (index) {
this.rows.splice(index, 1);
},
displayValue:function (e) {
var value = e.target.value
var a = this.filters.moneyFormat(value);
return a;
}
}
}
</script>
<style lang="scss" scoped>
.is-danger{
color: RED;
}
</style>回答 1
Stack Overflow用户
发布于 2018-06-05 03:44:34
正如前面所说的，如果你想使用过滤器，你需要做this.$options.filters.moneyFormat(value)
您试图实现的是在输入中呈现moneyFormat，而显示的值是v-model。这是你必须格式化的。
因此，您可以初始化一个新的数据属性，其中填充了在装载时格式化的每个row.charges：
data: function () {
return {
rows: [
//...
],
currentCharges: []
}
},
mounted() {
this.rows.forEach(row => {
let formattedCharges = this.$options.filters.moneyFormat(row.charges)
this.currentCharges.push(formattedCharges)
})
},并使用此数据来完成您的输入：
<tr v-for="(row, index) in rows">
<td>
<input v-model="currentCharges[index]" @input="displayValue($event, index)">
<td>若要使当前模型保持更新，请在v- row.charges更新时重新指定它：
methods: {
displayValue:function (e, index) {
// the target value is a string like this " ₹ 55.20"
// split it and convert the last element to Float type
let arrValue = e.target.value.split(" ")
let parseValue = parseFloat(arrValue[arrValue.length -1])
// reassign the row.charges with the new float value
this.rows[index].charges = parseValue
}
},页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50680751
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