如何用PHP和Vue实现仓库管理的入库管理功能

`id` int(11) not null auto_increment,
`name` varchar(255) not null,
`code` varchar(255) not null,
`model` varchar(255),
`spec` varchar(255),
`unit` varchar(255),
primary key (`id`)

`id` int(11) not null auto_increment,
`goods_id` int(11) not null,
`quantity` int(11) not null,
`created_at` timestamp not null default current_timestamp,
primary key (`id`),
foreign key (`goods_id`) references `goods` (`id`)

$stmt = $conn->prepare('SELECT * FROM goods');
$stmt->execute();
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);

echo json_encode($result);

$goods_id = $_POST['goods_id'];
$quantity = $_POST['quantity'];

$stmt = $conn->prepare('INSERT INTO stock (goods_id, quantity) VALUES (?, ?)');
$stmt->execute([$goods_id, $quantity]);

echo json_encode(['status' => 'success']);

<meta charset="UTF-8">
<title>仓库管理</title>

<div id="app">
    <h1>入库管理</h1>
    <form @submit.prevent="addStock">
        <select v-model="selectedGoods">
            <option v-for="goods in goodsList" :value="goods.id">{{ goods.name }}</option>
        </select>
        <input type="number" min="1" v-model="quantity" required>
        <button type="submit">确认入库</button>
    </form>
    <ul>
        <li v-for="stock in stockList">{{ stock.name }} 入库 {{ stock.quantity }} 件</li>
    </ul>
</div>

<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
    new Vue({
        el: '#app',
        data: {
            selectedGoods: '',
            quantity: '',
            goodsList: [],
            stockList: []
        },
        methods: {
            getGoodsList() {
                fetch('api.php?action=getGoodsList')
                .then(response => response.json())
                .then(data => {
                    this.goodsList = data;
                });
            },
            addStock() {
                const formData = new FormData();
                formData.append('action', 'addStock');
                formData.append('goods_id', this.selectedGoods);
                formData.append('quantity', this.quantity);

                fetch('api.php', {
                    method: 'POST',
                    body: formData
                })
                .then(() => {
                    this.getStockList();
                    this.selectedGoods = '';
                    this.quantity = '';
                });
            },
            getStockList() {
                // 获取入库记录列表
            }
        },
        mounted() {
            this.getGoodsList();
            this.getStockList();
        }
    });
</script>