ios - 使用 updateChildValues 更新 childByAutoId
问题描述
我正在尝试使用 childByAutoID 和 updateChildAt() 更新我的 firebase 数据库中的子节点。当我执行代码时,类型会更新,但是它位于节点之外,如下所示。
type: 3 应该在表示 type: 2 的节点内更新
我用来执行这个的代码看起来像
let DB_REF = Database.database().reference()
let WORK_PROG_REF = DB_REF.child("workInProgress")
func completeJobProgress() {
let workUser = self.workerUser
let uid = Auth.auth().currentUser?.uid
let workerId = workUser?.uid
let address = workerUser?.address
let createDate = Int(NSDate().timeIntervalSince1970)
Database.database().reference().child("users").child(uid!).observeSingleEvent(of: .value, with: { (snapshot) in
guard let dictionary = snapshot.value as? [String : Any] else { return }
let user = User(dictionary: dictionary as [String : AnyObject])
workUser?.uid = snapshot.key
let docData: [String: Any] = ["workerId": uid!,
"creationDate": createDate,
"fromId" : workerId!,
"location": address!,
"type": 3,
"checked": 0,]
self.setJobToCompletedInDatabase(uid: uid!, values: docData as [String : AnyObject])
self.postJobNotificationsIntoDatabseWithUID(uid: workerId!, values: docData as [String : AnyObject])
//how I initially got the type: 3 to save under the node was by using the line below
WORK_PROG_REF.child(uid!).child("type").setValue(3)
print(workerId!)
}, withCancel: { (err) in
print("attempting to load information")
})
print("Finished saving user info")
self.dismiss(animated: true, completion: {
print("Dismissal complete")
})
}
这只是将类型设置为节点下。我尝试使用下面的代码,但使用下面的行,我收到错误无法将“String”类型的值转换为预期的参数类型“[AnyHashable:Any]”
WORK_PROG_REF.child(uid!).updateChildValues("type").setValue(3)
感谢您的任何帮助
解决方案
尝试:
交易解决方案:
WORK_PROG_REF.child(uid!).child("-M1bOYAcP_IMFbgz8siD").runTransactionBlock({ (result: MutableData) -> TransactionResult in
if var objInfo = result.value as? [String: Any] {
objInfo["type"] = 3
// Set value and report transaction success
result.value = objInfo
return TransactionResult.success(withValue: result)
}else{
return TransactionResult.success(withValue: result)
}
}) { (error,completion,snap) in
//Handle Error
}
无事务解决方案:
WORK_PROG_REF.child(uid!).child("-M1bOYAcP_IMFbgz8siD"). child("type").setValue(3)
我希望这能解决您的问题。