我正在使用 Nodejs 並使用expressjs框架，現在我正在嘗試獲取 “最後插入的 id”，但我在控制台中收到“未定義”，如何獲取最後插入的 id？這是我目前的程式碼
static async addServiceDetail(salonId,serviceId,genderTypeId,price,serviceName)
{
const sql = `SELECT id from hc_servicesdetail WHERE shopId='${shopId}' AND serviceId='${serviceId}' AND genderTypeId='genderTypeId'`;
const [rows, fields] = await pool.execute(sql);
if(rows<1)
{
const sql2 = `INSERT INTO hc_servicesdetail (shopId, serviceId, genderTypeId,price,serviceName) VALUES ("${shopId}", "${serviceId}", "${genderTypeId}", "${price}","$ {serviceName}")`;
const datass = await pool.execute(sql2);
console.log('last inserted id is ' datass.insertId);
}
else
{
console.log('already exist');
}
}
}
module.exports = User;# 
使用
result.insertId屬性。此屬性在執行INSERT查詢時執行的回呼函數中可用。static async addServiceDetail(shopId, serviceId, genderTypeId, price, serviceName) { const sql = `SELECT id from hc_servicesdetail WHERE shopId='\${shopId}' AND serviceId='\${serviceId}' AND genderTypeId='\${genderTypeId}'`; const [rows, fields] = await pool.execute(sql); if (rows請注意，我在第一個 SQL 查詢中將
genderTypeId='genderTypeId'更改為ngenderTypeId='\${genderTypeId}'。這應該會修復語法錯誤。