在我的 onWrite
事件处理程序中,我在不同的数据库路径中执行数据更新。该函数在未完成执行任务的情况下被中断。我正在实现 Promise.all() 来将 promise 数组发送到 GCF 并等待所有未完成的工作/任务完成。控制台日志未显示错误。我正在尝试找出我的实现是否正确。
exports.ObserveProposals = functions.database.ref("/proposals/{jobid}/{propid}").onWrite((event) => {
const jobid = event.params.jobid;
const userId = event.params.propid;
const promises = [];
const isinvitation = event.data.child("isinvitation").val();
if (!isinvitation) {
return userRef = admin.database().ref(`users/${userId}/proposals/sent`);
if (event.data.exists() && !event.data.previous.exists()) {
return userRef.child(jobid).set({
timestamp: admin.database.ServerValue.TIMESTAMP
});
} else if (!event.data.exists() && event.data.previous.exists()) {
return userRef.child(jobid).remove();
}
promises.push(userRef);
}
return collectionRef = admin.database().ref(`/jobs/${jobid}`).once('value').then(snapshot => {
if (snapshot.val() !== null) {
return countRef = collectionRef.child("proposals").transaction(current => {
if (event.data.exists() && !event.data.previous.exists()) {
return (current || 0) + 1;
} else if (!event.data.exists() && event.data.previous.exists()) {
return (current || 0) - 1;
}
});
}
promises.push(collectionRef);
});
return Promise.all(promises);
});
最佳答案
Bellow 函数工作正常,promise 数组正在发送到 GCF 并且所有任务都已执行。
exports.ObserveProposals = functions.database.ref("/proposals/{jobid}/{propid}").onWrite((event) => {
const jobid = event.params.jobid;
const userid = event.params.propid;
const promises = [];
let userRef = admin.database().ref(`users/${userid}/proposals`);
let jobRef = admin.database().ref(`/jobs/${jobid}/proposals`);
jobRef.once('value').then(snapshot => {
if (snapshot.val() !== null) {
jobRef.transaction(current => {
if (event.data.exists() && !event.data.previous.exists()) {
return (current || 0) + 1;
} else if (!event.data.exists() && event.data.previous.exists()) {
return (current || 0) - 1;
}
});
}
});
promises.push(jobRef);
if (event.data.exists() && !event.data.previous.exists()) {
const isInvitation = event.data.child("isinvitation").val();
if (!isInvitation) {
return userRef.child(`/sent/${jobid}`).set({
timestamp: admin.database.ServerValue.TIMESTAMP
});
} else if (isInvitation) {
return userRef.child(`/received/${jobid}`).set({
timestamp: admin.database.ServerValue.TIMESTAMP
});
}
} else if (!event.data.exists() && event.data.previous.exists()) {
const isInvitation = event.data.previous.child("isinvitation").val();
if (!isInvitation) {
return userRef.child(`/sent/${jobid}`).remove();
}else if (isInvitation) {
return userRef.child(`/received/${jobid}`).remove();
}
}
promises.push(userRef);
return Promise.all(promises);
});
关于firebase - Cloud Functions for Firebase 将 promise 数组返回给 GCF,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43242982/