Problem with expandable child component in parent v-data-table using Vuetify 2 - vuetify.js

Question

I upgraded to Vuetify 2 from 1.5. Everything went pretty smoothly except for one thing. I have a parent component with a v-data-table and I want to pass data and expand each row with a child component.
ScanGrid(parent component):
<template>
<v-container>
<v-card>
<v-card-text>
<v-layout row align-center>
<v-data-table
:headers="headers"
:items="items"
:hide-default-footer="true"
item-key="id"
>
<template slot="items" slot-scope="props">
<tr #click="props.expanded = !props.expanded">
<td>{{ props.item.name }}</td>
<td class="text-xs-left large-column">
{{ props.item.scanned }}
</td>
<td class="text-xs-left large-column">
{{ props.item.incoming }}
</td>
<td class="text-xs-left large-column">
{{ props.item.outgoing }}
</td>
<td class="text-xs-left large-column">
{{ props.item.unknown }}
</td>
</tr>
</template>
<template slot="expand" slot-scope="props">
<ScanGridChild :value="props.item"></ScanGridChild>
</template>
</v-data-table>
</v-layout>
</v-card-text>
</v-card>
</v-container>
</template>
ScanGridChild(child component):
<template>
<v-card>
<v-card-text>{{ value }}</v-card-text>
</v-card>
</template>
<script>
export default {
name: "ScanGridChildComponent",
props: {
value: {
Type: Object,
Required: true
}
},
computed: {},
watch: {
props: function(newVal, oldVal) {
console.log("Prop changed: ", newVal, " | was: ", oldVal);
this.render();
}
}
};
</script>
<style></style>
It worked fine in Vuetify 1.5.19. I'm on Vuetify 2.1.6 and using single file components. Thanks.

Answer 1

Vuetify 2.x has major changes to many components, slot-scopes are replaced with v-slot, and many new properties and slots added to vuetify data table
Here is the working codepen reproduced the same feature with above code
https://codepen.io/chansv/pen/BaaWbKR?editors=1010
You need to make sure that you have vue js 2.x and vuetify 2.x
Parent component code:
<template>
<v-container>
<v-card>
<v-card-text>
<v-layout row align-center>
<v-data-table
:headers="headers"
:items="items"
item-key="name"
single-expand
:expanded="expanded"
hide-default-footer
#click:row="clickedRow"
>
<template v-slot:expanded-item="{ item }">
<td :colspan="headers.length">
<ScanGridChild :value="item"></ScanGridChild>
</td>
</template>
</v-data-table>
</v-layout>
</v-card-text>
</v-card>
</v-container>
</template>
<script>
export default {
...
data () {
return {
expanded: [],
headers: [
{
text: "Localisation",
sortable: true,
value: "name"
},
{
text: "Paquets scannés",
sortable: true,
value: "scanned"
},
{
text: "Paquets entrants",
sortable: true,
value: "incoming"
},
{
text: "Paquets sortants",
sortable: true,
value: "outgoing"
},
{
text: "Paquets inconnus",
sortable: true,
value: "unknown"
}
],
items: [
{
id: 1,
name: "Location 1",
scanned: 159,
incoming: 6,
outgoing: 24,
unknown: 4,
test: "Test 1"
},
{
id: 2,
name: "Location 2",
scanned: 45,
incoming: 6,
outgoing: 24,
unknown: 4,
test: "Test 2"
}
],
}
},
methods: {
clickedRow(value) {
if (this.expanded.length && this.expanded[0].id == value.id) {
this.expanded = [];
} else {
this.expanded = [];
this.expanded.push(value);
}
}
}
...
}
</script>
In child component
Replace
props: {
value: {
Type: Object,
Required: true
}
},
with( Type and Required change to lower case type and required)
props: {
value: {
type: Object,
required: true
}
},