Vue. How to get a value of a "key" attribute in created element

Question

I try to create a components and get its key for using in axios. Elements created, but I can't get a key. It's undefined

<div class="container" id="root">
    <paddock is="paddock-item" v-for="paddock in paddocks" :key="paddock.key" class="paddock">
    </paddock>
</div>
<script>
var pItem = {
    props: ['key'],
    template: '<div :test="key"></div>',
    created: function() {
        console.log(key);
    }
    };
new Vue({
    el: '#root',
    components: {
        'paddock-item': pItem
    },
    data: {
        paddocks: [
            {key: 1},
            {key: 2},
            {key: 3},
            {key: 4}
        ]
    }
})
</script>

I try some variants, but no result - @key was empty.

Answer 1

you don't need to use an extra attribute. You can get the key by

this.$vnode.key