NodeJS Express 应用程序 await 仅在异步函数中有效，但这显然是异步函数吗？

Question

我做了一个函数来检查数据库中是否已经存在某个东西。我只是简单地复制粘贴了我用来在数据库中获取某些内容的逻辑并更改了查询对象 + 返回的内容。但现在看来 node 不喜欢那样，只是抛出一个对我来说毫无意义的错误。

我在哪里调用函数：

let exists = await queryDatabaseExists(uniqueQuery, res);

我正在调用的函数：

async function queryDatabaseExists(queryParam, res) {
    try {
        const cp = new sql.ConnectionPool(config);
        await cp.connect();
        let result = await cp.request().query(queryParam);
        if(result.recordset.rowsAffected[0] = 1){return true} else { return false }
    } catch (err) {
        res.status(520).send(`Database error: ${err}`);
    }
}

我得到的错误：

let exists = await queryDatabaseExists(uniqueQuery, res);
             ^^^^^

SyntaxError: await is only valid in async function

该路线的所有代码：

router.post("/admin/category", (req, res) => {

    uniqueQuery = `SELECT [name] from [dbo].[idtTV_categories] WHERE [name] = '${req.body.name}'`

    getQuery = `SELECT [id]
    ,[name]
    ,[description]
    ,[created_time]
    ,[created_by] from [dbo].[idtTV_categories]`

    standardQuery = `INSERT INTO [dbo].[idtTV_categories] ([name],[description],[created_time],[created_by]) 
    VALUES 
    ('${req.body.name}', 
    '${req.body.description}',
    SYSDATETIME(),
    '${req.user.name}')`;

    let exists = checkIfExists();

    function checkIfExists() { result = await queryDatabaseExists(uniqueQuery, res); return result} ;

    console.log(exists);

    if(req.user.roles.some(role => role === admin || role === editor)){
        if(!existsInDatabase){
        if(queryDatabase(standardQuery, res)){queryDatabase_get(getQuery, res)}
    }
}

    else { res.statusMessage = `${req.user.name} is not authorized to add categories.`;
           console.log(req.user.roles)
           res.status(520).send() };

})

所有被调用的函数：

///////////// MAIN QUERYING FUNCTION //////////////////////
async function queryDatabase_get(queryParam, res) {
    try {
        const cp = new sql.ConnectionPool(config);
        await cp.connect();
        let result = await cp.request().query(queryParam);
        res.send(result.recordset);
    } catch (err) {
        res.status(520).send(`Database error: ${err}`);
    }
}

async function queryDatabaseExists(queryParam, res) {
    try {
        const cp = new sql.ConnectionPool(config);
        await cp.connect();
        let result = await cp.request().query(queryParam);
        if(result.recordset.rowsAffected[0] = 1){return true} else { return false }
    } catch (err) {
        res.status(520).send();
    }
}

async function queryDatabase(queryParam, res) {
    try {
        const cp = new sql.ConnectionPool(config);
        await cp.connect();
        let result = await cp.request().query(queryParam);
        if(result.rowsAffected > 0){ return true }
    } catch (err) {
        res.status(520).send(`Database error: ${err}`);
    }
}

Answer 1

它必须在异步内部。前任：

app.post('/', async (req, res) => {
  let exists = await queryDatabaseExists(uniqueQuery, res);
});