[ { "date": "2023-05-22", "orderList": [{ "id": 22, "schoolId": null, "schoolName": null, "name": null, "menuType": 1, "amount": 0.66, "refundAmount": null, "orderNo": null, "status": 3, "week": null, "orderDate": null, "detailList": [{ "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.01, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.01, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.01, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.02, "quantity": 2 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.01, "quantity": 1 }] } }]vue怎么把里面的amount加一起获得总和

你可以通过遍历订单列表，累加每个订单的菜品总价来获得总金额。具体可以使用reduce方法，如下所示：

const orders = [ { "date": "2023-05-22", "orderList": [{ "id": 22, "schoolId": null, "schoolName": null, "name": null, "menuType": 1, "amount": 0.66, "refundAmount": null, "orderNo": null, "status": 3, "week": null, "orderDate": null, "detailList": [{ "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.01, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.01, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.01, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.02, "quantity": 2 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "大米炒鸡蛋", "price": null, "amount": 0.66, "quantity": 1 }, { "id": null, "detailNo": null, "menuType": null, "orderDate": "2023-05-22", "name": "红烧肉", "price": null, "amount": 0.01, "quantity": 1 }] } }];

const totalAmount = orders.reduce((acc, order) => {
  const orderAmount = order.orderList.reduce((subAcc, item) => {
    return subAcc + item.amount;
  }, 0);
  return acc + orderAmount;
}, 0);

console.log(totalAmount); // 输出总金额

在上面的代码中，我们首先使用reduce方法遍历订单列表，累加每个订单的菜品总价。每个订单的菜品总价是通过使用reduce方法遍历订单中的detailList属性来计算的。最后，使用reduce方法累加所有订单的菜品总价，得到了最终的总金额。