Firebase 更新检索到的数据

Firebase updating the retrieved data

我正在练习 firebase firestore,我正在尝试根据条件更新我检索到的数据,但我收到了这个错误

FirebaseError: Expected type 'rc', but it was: a custom oc object

 if (updateMerge === "update") {
  const q = query(
    collection(db, "contacts"),
    where("fname", "==", firstName, "lname", "==", lastName)
  );
  const querySnapshot = await getDocs(q);
  querySnapshot.forEach((doc) => {
    console.log(doc.id, " => ", doc.data());
    const payload = { phone: phone };
    setDoc(q, payload);
  });
}

我正在做一个联系人应用 我可以在控制台上看到检索到的数据,如果用户已经有一个帐户,我想更改 phone 号码,因此有效负载会更改 phone(来自 firestore 文档字段):phone(phone 状态)。 所以我用 setDoc 做了一些练习,但我通常使用“collectionRef”而不是查询,如果我能看到控制台,很可能错误会在这里

setDoc(q, payload);

提前致谢

setDoc() takes a DocumentReference as first parameter. If you are trying to update the documents in the QuerySnapshot,尝试重构代码如下所示:

querySnapshot.forEach((doc) => {
  console.log(doc.id, " => ", doc.data());
  const payload = { phone: phone };

  // doc.ref is DocumentReference
  setDoc(doc.ref, payload);
});

如果您要更新 500 个或更少的文档,那么您可以使用 Batched Writes 来确保所有文档都已更新或更新失败:

import { writeBatch } from "firebase/firestore"; 

const batch = writeBatch(db);

querySnapshot.forEach((doc) => {
  console.log(doc.id, " => ", doc.data());
  const payload = { phone: phone };

  // doc.ref is DocumentReference
  batch.update(doc.ref, payload);
});

batch.commit().then(() => {
  console.log("Documents updated")
}).catch((e) => {
  console.log("An error occured")
})