Vue.draggable Get Dragged Item and List ID - ruby-on-rails

Question

I've read all the documentation and stackoverflow I can find, but still am having issues with this.
I'm building a Trello clone with Vue and Rails.
I have many draggable lists.
Each list has draggable cards.
When I drag a card from one list to a second list, how do I persist this to my ajax rails endpoint?
I've tried using the #end method and the :move prop, but have had zero luck.
#app.vue
<template>
<draggable v-model="lists" group='lists' class="row dragArea" #end="listMoved">
<div v-for="(list, index) in lists" class="col-3">
<h6>{{ list.name }}</h6>
<hr />
<draggable v-model="list.cards" group='cards' class="dragArea" :move="cardMoved">
<div v-for="(card, index) in list.cards" class="card card-body mb-3">
{{ card.name }}
</div>
</draggable>
<div class="card card-body">
<input v-model="messages[list.id]" class="form-control" ></input>
<button v-on:click="submitMessages(list.id)" class="btn btn-secondary">Add</button>
</div>
</div>
</draggable>
</template>
<script>
import draggable from 'vuedraggable'
export default {
components: { draggable },
props: ["original_lists"],
data: function() {
return {
messages: {},
lists: this.original_lists
}
},
methods: {
cardMoved: function(event) {
console.log(event)
var data = new FormData
data.append("card[list_id]", WHERE_DO_I_FIND_THIS_ID)
data.append("card[position]", event.draggedContext.element.id)
Rails.ajax({
url: `/cards/${event.draggedContext.element.id}/move`,
type: "PATCH",
data: data,
datatype: "json"
})
},
}
}
</script>

Answer 1

Use the change event that contains all the dnd information you need and is called only once the drag operation is ended.
As suggested by #sovalina you need to pass extra infomation linked to the list:
:change="changed(list.id, $event)"
Also your div should be keyed:
<div v-for="(card, index) in list.cards" :key="card.name" class="card card-body mb-3">