我的数据库已建立，因此每当用户发布帖子时，其名称和图像信息就会与该帖子一起保存，以保存阅读（通过不要求对正在阅读的每个帖子都要求对用户数据进行读取）。 / p>
我正在尝试构建一个函数，当该用户在设置中更改其姓名时，该用户的所有帖子实例中该用户的姓名都将更改。
*注意：我应用中的所有帖子都是问题。
我已经部署了它并尝试对其进行测试，通过更改用户名，我可以肯定有一个问题，即他们是谁的作者（我可以在数据中看到这一点）。只要我正确使用通配符，该路径也是正确的，据我所知。
当我这样做时，他们的名字在问题数据集中不会改变。
当我查看日志时，看到此错误：
Error: No document to update: projects/my-projects-name/databases/(default)/documents/communities_data/4ORj0bh9rpi2Ns5vj4pW/questions/undefined
at Http2CallStream.call.on (/srv/node_modules/@grpc/grpc-js/build/src/client.js:96:45)
at emitOne (events.js:121:20)
at Http2CallStream.emit (events.js:211:7)
at process.nextTick (/srv/node_modules/@grpc/grpc-js/build/src/call-stream.js:71:22)
at _combinedTickCallback (internal/process/next_tick.js:132:7)
at process._tickDomainCallback (internal/process/next_tick.js:219:9)
我不知道为什么一定会出现一个与该查询相对应的文档。
这是我的功能：
exports.updateUser = functions.firestore.document('communities_data/{community}/profiles/{profileID}').onUpdate((change, context) => {
// Retrieve the current and previous value
const data = change.after.data();
const previousData = change.before.data();
// We'll only update if the name has changed.
// This is crucial to prevent infinite loops.
if (data !== undefined && previousData !== undefined) {
if (data.name !== previousData.name || data.image !== previousData.image) {
return db.collection('communities_data/' + context.params.community + '/questions').where('author_ID', '==', context.params.profileID).get()
.then(snapshot => {
if(snapshot.size >0){
snapshot.forEach(doc => {
const question = doc.data as unknown as Question
const promises = []
const p = db.doc('communities_data/' + context.params.community + '/questions/' + question.id)
.update({
author_name: data.name,
author_image: data.image
});
promises.push(p)
return Promise.all(promises)
})
}
}
)
} else {
return null;
}
} else {
return null;
}
});
这是我的Question类：
class Question {
id: string;
title: string;
details: string;
language: Number;
tags: Array<string>;
timestamp: Number;
author_ID: string;
author_name: string;
author_image: string;
answers: Number;
last_interaction: Number;
score_items: Number;
constructor(id: string, title: string, details: string, language: Number, tags: [], timestamp: Number, author_ID: string, author_name: string, author_image: string, answers: Number, last_interaction: Number, score_items: Number) {
this.id = id;
this.title = title;
this.details = details;
this.language = language;
this.tags = tags;
this.timestamp = timestamp;
this.author_ID = author_ID;
this.author_name = author_name;
this.author_image = author_image;
this.answers = answers;
this.last_interaction = last_interaction;
this.score_items = score_items;
}
}