<template>
    <v-select
    v-model="selected"
    :items="products"
    label="Standard"
    item-text="name"
    item-value="id"
    return-object
    ></v-select>
</template>
<script>
    export default {
        data: () => ({
            products: [],
            selected:{id:1,stock_count:5,quantity:5,name:'Product 1'}
        }),
        methods:{
            getproductAPI(){
                this.products= [
                {
                    id:1,
                    stock_count:5,
                    quantity:5,
                    name:'Product 1'
                },
                {
                    id:2,
                    stock_count:10,
                    quantity:10,
                    name:'Product 2'
                },

                ]
            },
        },
        mounted(){
            this.getproductAPI()
        }

    }
</script>

如果您使用对象

尝试这个：

<v-select 
  :items="items"
  v-model="selection"
>
</v-select>
...
selection: 0

如果您有其他数据（根据product. stock_count/quantity您想要显示的数据，您可以使用item-text, item-valueprops.