Exclude disabled item in V-Data-Table's select-all [VUETIFY] - vuejs2

Question

I have v-data-table with disabled item and want to exclude it when I trigger the select-all in header.data-table-select slot. Also applied :readonly but still get checked.
<template v-slot:item.data-table-select="{ item, isSelected, select }">
<v-simple-checkbox
:value="isSelected"
:readonly="item.name == 'Frozen Yogurt'"
:disabled="item.name == 'Frozen Yogurt'"
#input="select($event)"
></v-simple-checkbox>
</template>
Also looked at the docs and found this header.data-table-select slot but only gives me this options:
{
props: {
value: boolean
indeterminate: boolean
},
on: {
input: (value: boolean) => void
}
}
Is there any way of handling selected items in v-data-table?
Here's the live code: https://d4et5.csb.app/
EDITED
CodeSandBox: https://codesandbox.io/s/festive-haze-d4et5

Answer 1

It is possible to remove disabled item form a select all in datatable
I've added a new key "disabled" in items array
Here is the working codepen:
https://codepen.io/chansv/pen/mdJMvJr?editors=1010
<div id="app">
<v-app id="inspire">
<v-data-table
v-model="selected"
:headers="headers"
:items="desserts"
item-key="name"
show-select
class="elevation-1"
#toggle-select-all="selectAllToggle"
>
<template v-slot:item.data-table-select="{ item, isSelected, select }">
<v-simple-checkbox
:value="isSelected"
:readonly="item.disabled"
:disabled="item.disabled"
#input="select($event)"
></v-simple-checkbox>
</template>
</v-data-table>
</v-app>
</div>
new Vue({
el: '#app',
vuetify: new Vuetify(),
data () {
return {
selected: [],
disabledCount: 0,
headers: [
{
text: 'Dessert (100g serving)',
align: 'start',
sortable: false,
value: 'name',
},
{ text: 'Calories', value: 'calories' },
{ text: 'Fat (g)', value: 'fat' },
{ text: 'Carbs (g)', value: 'carbs' },
{ text: 'Protein (g)', value: 'protein' },
{ text: 'Iron (%)', value: 'iron' },
],
desserts: [
{
name: 'Frozen Yogurt',
calories: 159,
fat: 6.0,
carbs: 24,
protein: 4.0,
iron: '1%',
disabled: true,
},
{
name: 'Ice cream sandwich',
calories: 237,
fat: 9.0,
carbs: 37,
protein: 4.3,
iron: '1%',
},
{
name: 'Eclair',
calories: 262,
fat: 16.0,
carbs: 23,
protein: 6.0,
iron: '7%',
},
{
name: 'Cupcake',
calories: 305,
fat: 3.7,
carbs: 67,
protein: 4.3,
iron: '8%',
},
{
name: 'Gingerbread',
calories: 356,
fat: 16.0,
carbs: 49,
protein: 3.9,
iron: '16%',
disabled: true,
},
{
name: 'Jelly bean',
calories: 375,
fat: 0.0,
carbs: 94,
protein: 0.0,
iron: '0%',
},
{
name: 'Lollipop',
calories: 392,
fat: 0.2,
carbs: 98,
protein: 0,
iron: '2%',
},
{
name: 'Honeycomb',
calories: 408,
fat: 3.2,
carbs: 87,
protein: 6.5,
iron: '45%',
},
{
name: 'Donut',
calories: 452,
fat: 25.0,
carbs: 51,
protein: 4.9,
iron: '22%',
},
{
name: 'KitKat',
calories: 518,
fat: 26.0,
carbs: 65,
protein: 7,
iron: '6%',
},
],
}
},
methods: {
selectAllToggle(props) {
if(this.selected.length != this.desserts.length - this.disabledCount) {
this.selected = [];
const self = this;
props.items.forEach(item => {
if(!item.disabled) {
self.selected.push(item);
}
});
} else this.selected = [];
}
},
created() {
const self = this;
this.desserts.map(item => {
if (item.disabled) self.disabledCount += 1
})
}
})

Answer 2

On tops chans' answer. if you have pagination with your datatable, and you have multiple pages of data, the answer probably won't work for you. instead of calculating disabledCount i calculate if selected items length is equal to all available items length
selectAllToggle(props) {
let availableItems = props.items.filter(item => !item.isDisabled)
if (this.selected.length !== availableItems.length) {
this.selected = availableItems;
} else {
this.selected = [];
}
}

Answer 3

Just One simple change will work. You have to change the value attribute v-simple-checkbox.
<template v-slot:item.data-table-select="{ item, isSelected, select }">
<v-simple-checkbox
:value="(item.name !== 'Frozen Yogurt') && isSelected"
:readonly="item.name == 'Frozen Yogurt'"
:disabled="item.name == 'Frozen Yogurt'"
#input="select($event)"
></v-simple-checkbox>
</template>