我对云函数node.js和type script是新手。我正在运行下面的代码，得到了下面的错误，并且看了一大堆关于承诺的视频和搜索其他问题后无法理解它。
如有任何帮助，我们将不胜感激。
函数返回未定义的预期承诺或值
exports.compReqUpdated = functions.firestore
.document('/compRequests/{id}')
.onUpdate((change, contex)=>{
const newData = change.after.data();
//const oldData = change.before.data();
const dbConst = admin.firestore();
const reqStatus:string = newData.requestStatus;
const compId:string = newData.compID;
const reqActive:boolean = newData.requestActive;
if (reqStatus == "CANCELED" && reqActive){
const query = dbConst.collection('compRequests').where('compID', '==', compId);
const batch = dbConst.batch();
query.get().then(querySnapshot => {
const docs = querySnapshot.docs;
for (const doc of docs) {
console.log(`Document found at path: ${doc.ref.path}`);
console.log(doc.id);
const docRef = dbConst.collection('compID').doc(doc.id);
batch.update(docRef, {requestStatus: 'CANCELED',requestActive: false});
};
return batch.commit()
})
.catch(result => {console.log(result)});
}else{
return
}
});
firebase文档说明传递给onUpdate函数的回调应该返回PromiseLike或Any值，但您现在没有返回任何值。如果您将代码改为如下所示，我认为它应该按预期工作:
exports.compReqUpdated = functions.firestore
.document('/compRequests/{id}')
.onUpdate((change, contex) => {
const newData = change.after.data();
//const oldData = change.before.data();
const dbConst = admin.firestore();
const reqStatus: string = newData.requestStatus;
const compId: string = newData.compID;
const reqActive: boolean = newData.requestActive;
if (reqStatus == "CANCELED" && reqActive) {
const query = dbConst.collection('compRequests').where('compID', '==', compId);
const batch = dbConst.batch();
return query.get().then(querySnapshot => {
const docs = querySnapshot.docs;
for (const doc of docs) {
console.log(`Document found at path: ${doc.ref.path}`);
console.log(doc.id);
const docRef = dbConst.collection('compID').doc(doc.id);
batch.update(docRef, { requestStatus: 'CANCELED', requestActive: false });
};
return batch.commit()
}).catch(result => { console.log(result) });
} else {
return false;
}
});
