以下Google Cloud函数返回空结果。
相同的代码可以与onRequest一起正常工作,并按预期返回数据。我想使用可调用函数,以便轻松地将参数发送到该函数。有人知道这是怎么回事吗?
const functions = require('firebase-functions');
const mysql = require('mysql');
exports.getUserData = functions.https.onCall((data, context) => {
const connectionName =
process.env.INSTANCE_CONNECTION_NAME || 'instance';
const dbUser = process.env.SQL_USER || 'root';
const dbPassword = process.env.SQL_PASSWORD || 'password';
const dbName = process.env.SQL_NAME || 'someDb';
const mysqlConfig = {
connectionLimit: 1,
user: dbUser,
password: dbPassword,
database: dbName,
};
if (process.env.NODE_ENV === 'production') {
mysqlConfig.socketPath = `/cloudsql/${connectionName}`;
}
let mysqlPool;
if (!mysqlPool) {
mysqlPool = mysql.createPool(mysqlConfig);
}
mysqlPool.query('SELECT * from table where id = 1', (err, results) => {
if (err) {
console.error(err);
} else {
data.send(JSON.stringify(results));
}
});
})
答案 0 :(得分:2)
正如您将在Firebase官方视频系列(https://firebase.google.com/docs/functions/video-series/)中有关“ JavaScript Promises”的三个视频中看到的那样,您必须在Cloud Function中返回Promise或值,以向平台表明它具有完成。
您使用的mysqljs/mysql
库不会返回Promises,因此一种方法是使用promise-mysql
,它“是mysqljs/mysql
的包装器,其中包装了带有Bluebird Promise的函数调用”。 / p>
我还没有尝试过,但是以下几行应该可以解决问题:
const functions = require('firebase-functions');
const mysql = require('mysql');
const mysqlPromise =require('promise-mysql');
exports.getUserData = functions.https.onCall((data, context) => {
//.....
const connectionOptions = ...;
return mysqlPromise.createPool(connectionOptions) //you must return the Promises chain
.then(pool => {
return pool.query('SELECT * from table where id = 1')
})
.then(results => {
return(results: JSON.stringify(results));
//send back the response with return() not with data.send(), see the doc
})
.catch(error => {
//See the Callable Functions doc: https://firebase.google.com/docs/functions/callable#handle_errors_on_the_client
});
});
答案 1 :(得分:0)
您还可以将Promise封装在mysqljs / mysql中。
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