node.js - 云函数查询冲突

问题描述

我正在编写一个谷歌云功能来创建聊天室，用户从移动应用程序向他的兴趣发送一个请求到 firestore，然后触发函数读取 firestore 中的所有待处理请求，直到找到与用户匹配的人。当发生这种情况时，云功能会删除两个请求并创建聊天室，但我的问题是，如果多个用户同时发送请求，云功能会读取理论上应该已经删除的请求。这是我的代码：

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();

const db = admin.firestore();

exports.cargarPeticion = functions.firestore.document('/Requests/{id}').onCreate((snap, context) => {

    const newValue = snap.data();
    const uid = newValue.uid;
    const age = newValue.age;
    const sex = newValue.sex;
    const manInterest = newValue.Hombres;
    const womenInterest = newValue.Mujeres;
    const loveInterest = newValue.Love;
    const friendInterest = newValue.Friendship;
    const timestamp = newValue.Timestamp;
    const minAgeInterest = newValue.ageMin;
    const maxAgeInterest = newValue.ageMax;
    var ciclo = true;

    db.collection('Requests').orderBy('Timestamp').get()
    .then((snapshot) => {

        try{
            snapshot.forEach((doc) => {
                var data = doc.data(); 
                
                if(data.uid !== uid){
                    console.log("NUEVO");
                    console.log(doc.id, '=>', data.uid);

                    if(loveInterest === data.Love || friendInterest === data.Friendship){

                        if(data.age >= minAgeInterest &&
                            data.age <= maxAgeInterest && 
                            ((sex === "H" && data.Hombres === "true") || (sex === "M" && data.Mujeres === "true"))){

                            if(age >= data.ageMin &&
                                age <= data.ageMax && 
                                ((manInterest === "true" && data.sex === "H") || (womenInterest === "true" && data.sex === "M"))){

                                var arrayUsers = [uid, data.uid];

                            console.log("ID SALA");
                            console.log(uid.substring(0, 8) + data.uid.substring(0, 7) + doc.id.substring(0, 7));
                            db.collection('chatRoom').doc(uid.substring(0, 8) + data.uid.substring(0, 7) + doc.id.substring(0, 7)).set({
                                arrayUsers: arrayUsers,
                                uid1: uid,
                                uid2: data.uid,
                                chatRoomId : uid.substring(0, 8) + data.uid.substring(0, 7) + doc.id.substring(0, 7),
                                ultimoMensaje: '',
                                ultimoEscritorUid : '',
                                ultimoMensajeTiempo : 0
                            });

                            db.collection('Requests').doc(doc.id).delete();
                            db.collection('Requests').doc(snap.id).delete();


                            throw exception
                        }
                    }
                }
            }
        });
        }catch(exception){
            console.log(exception);
        }

        return null;
    })
    .catch((err) => {
        console.log('Error getting documents', err);
    });

})

标签： node.jsfirebasegoogle-cloud-firestoregoogle-cloud-functions

node.js - 云函数查询冲突

问题描述

解决方案

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