如何在firebase中为新创建的文档添加子集合

Question

我正在为firebase中的一些文档创建一个导入程序。

我需要为我添加的每个文档的特定属性有一个子集合(而不仅仅是一个数组(。

目前我有以下代码，似乎不起作用：

let rawdata = fs.readFileSync("files/" + file);
let spot = JSON.parse(rawdata);
var spotFirebase = {
id: spot.Id,
sourceId: spot.SourceId,
type: spot.Type,
location: new firebase.firestore.GeoPoint(spot.Latitude, spot.Longitude),
description: spot.Description,
address: spot.Address,
city: spot.City,
country: spot.Country,
price: spot.Price,
parkingCost: spot.ParkingCost,
opening: spot.Opening,
name: spot.Name,
features: spot.Features,
activities: spot.Activities,
rating: {
ratingCount: spot.Rating.RatingCount,
ratingAverage: spot.Rating.RatingAverage
}
}
db.collection("spots").add(spotFirebase).then(function (docRef) {
console.log("Document ", file, " written with ID: ", docRef.id, ", index: ", index, ". ", spot.Rating.UserRatings.length);
spot.Rating.UserRatings.forEach(ur =>
docRef.collection("userRatings").add(
{
date: ur.Date,
username: ur.UserName,
review: ur.Review,
note: ur.Note,
reviewSource: ur.ReviewSource
}).then(function (subDocRef) {
console.log("Review ID  ", subDocRef.id, " written");
}).catch(function (errorReview) {
console.error("Error adding document: ", errorReview);
}));
})
.catch(function (error) {
console.error("Error adding document: ", error);
});

1. 我没有显示错误
2. 我从未收到过"审阅ID…已写入"的消息
3. 很明显，我以编写的spot文档结束，但没有任何用户评分

我想我没有正确添加子集合。

我做错了什么？

Answer 1

代码在终止之前没有等待对子集合的添加完成。

此编辑将添加到子集合中的内容分解为可测试函数，收集在promises数组中创建每个新文档的承诺，然后等待所有这些(Promise.all()(完成，然后终止。。。

function addUserRating(parentRef, ur) {
const newDoc = {
date: ur.Date,
username: ur.UserName,
review: ur.Review,
note: ur.Note,
reviewSource: ur.ReviewSource
}
return parentRef.collection("userRatings").add(newDoc).then(result => {
console.log("Review ID  ", result.path, " written");
return result
})
}
db.collection("spots").add(spotFirebase).then(function (docRef) {
console.log("Document ", file, " written with ID: ", docRef.id, ", index: ", index, ". ", spot.Rating.UserRatings.length);
let promises = spot.Rating.UserRatings.map(ur => addUserRating(docRef, ur))
return Promise.all(promises)
}).catch(function (error) {
console.error("Error adding document(s): ", error)
})