Vuejs2- How to call a filter function from a method - vuejs2

Question

I am using "moneyFormat" filter for formatting the currency value. It's formatting the values which is defined already. I want to format the dynamic values. Hence I have called the filter function through a method called "displayValue", but I am getting error
and the given input field also not updated.
Here is my code :
<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>

Answer 1

You could use:
this.$options.filters.moneyFormat(value)
Check: https://v2.vuejs.org/v2/api/#vm-options
For global filters, first set:
Vue.prototype.$filters = Vue.options.filters
And then:
this.$filters.foo
Edit:
Looking closer your code, you are not using the filter as a Vue filter and only calling from one point (a method) instead of calling inline from HTML, maybe it's better that the method itself returns the value of the input, like:
displayValue: function (e) {
var val = e.target.value
if (val > 0) {
return accounting.formatMoney(val, " ₹ ", 2, ",", ".");
}
}
Did it work? Or the same error is shown? If yes, can you paste the error?
Hope it helps!

Answer 2

As it's been said, if you want to use the filter, you need to do this.$options.filters.moneyFormat(value)
What you're trying to achieve it's rendered the moneyFormat inside an input and the value displayed is the v-model. It's this one you have to format.
So you can initialize a new data property filled with each row.charges formatted on mounted:
data: function () {
return {
rows: [
//...
],
currentCharges: []
}
},
mounted() {
this.rows.forEach(row => {
let formattedCharges = this.$options.filters.moneyFormat(row.charges)
this.currentCharges.push(formattedCharges)
})
},
and use this data to fulfill your inputs:
<tr v-for="(row, index) in rows">
<td>
<input v-model="currentCharges[index]" #input="displayValue($event, index)">
<td>
To keep the current row.charges updated, reassign it when the v-model updates:
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
}
},