我正在努力进行异步操作。我试图简单地从firestore中获取值并将其存储在var中。
我设法接收到该值,当我专门这样做时(甚至可以在get函数中使用var),甚至可以将其保存在var中,但是当尝试以灵活的方式保存它时,我似乎无法正确地管理await:
async function getValues(collectionName, docName,) {
console.log("start")
var result;
var docRef = await db.collection(collectionName).doc(docName).get()
.then(//async// (tried this as well with async) function (doc) {
if (doc.exists) {
console.log("Document data:", doc.data());
result = doc.data().text;
console.log(result);
return //await// (this as well with async) result;
} else {
// doc.data() will be undefined in this case
console.log("No such document!");
result = "No such document!";
return result;
}
console.log("end");
}).catch (function (err) {
console.log('Error getting documents', err);
});
};
helpMessage = getValues('configuration','helpMessage');
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