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[英]Use FieldValue.arrayUnion in Flutter with Cloud FireStore
[英]Unhandled Rejection with FieldValue.arrayUnion()
我正在制作一個社交媒體克隆,當我嘗試關注另一個個人資料時,我遇到了錯誤。 當我嘗試 console.log("follow user") 時,它會正常工作,但是當我將其更改為 onClick={handleFollowUser} 時,它會拋出一條錯誤消息,指出某些內容未定義。
具體錯誤可以在這里查看: https://imgur.com/Lit4iqv
我得到的錯誤是:
未處理的拒絕 (FirebaseError):Function 使用無效數據調用 FieldValue.arrayUnion()。 不支持的字段值:未定義(在文檔 users/pX1fay49L6fLiYwnzIXL 中找到)
async function handleFollowUser() {
setFollowed(true);
await updateLoggedInUserFollowing(loggedInUserDocId, profileId, false);
await updateFollowedUserFollowers(profileDocId, userId, false);
}
<button
className="text-xs font-bold text-blue-medium"
type="button"
onClick={handleFollowUser}
// onClick={console.log('Follow this user!')}
>
Follow
</button>
export async function updateLoggedInUserFollowing(
loggedInUserDocId, // currently logged in user document id (gore's profile)
profileId, // the user that gore requests to follow
isFollowingProfile // true/false (am i currently following this person?)
) {
return firebase
.firestore()
.collection('users')
.doc(loggedInUserDocId)
.update({
following: isFollowingProfile ? FieldValue.arrayRemove(profileId) : FieldValue.arrayUnion(profileId)
});
}
export async function updateFollowedUserFollowers(
profileDocId, // currently logged in user document id (gore's profile)
loggedInUserDocId, // the user that gore requests to follow
isFollowingProfile // true/false (am i currently following this person?)
) {
return firebase
.firestore()
.collection('users')
.doc(profileDocId)
.update({
followers: isFollowingProfile
? FieldValue.arrayRemove(loggedInUserDocId)
: FieldValue.arrayUnion(loggedInUserDocId)
});
}
正如@Frank van Puffelend
所說,您正試圖向數據庫寫入一個未定義的值,這會引發錯誤。 您可以通過多種方式修復,一種是讓 Firebase 忽略未定義的值。 一個例子是:
import * as firestore from "firebase-admin"
const db = firestore.firestore();
db.settings({ ignoreUndefinedProperties: true })
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