Question

Firebase更新子项是iOS更新中的updateChildValues，不删除旧值但在Web和Android中删除旧数据并添加。看起来firebase方面的一个bug不确定。

iOS代码

 self.viewFirebase = [[Firebase alloc] initWithUrl: [NSString stringWithFormat:@"%@messages/%@",fOrgURL,self.userHash]];
 Firebase *insertData = [self.viewFirebase childByAutoId];
 Firebase *notificationRef = [[Firebase alloc] initWithUrl: [NSString stringWithFormat:@"%@notifications/%@/%@/",fOrgURL,fromHash,self.userHash]];
  NSDictionary *dummyData = @{@"a":@"0"};
  NSDictionary *messageIDDict = @{insertData.key : dummyData};

    Firebase *lastData = [notificationRef childByAppendingPath:@"inbox/"];

   NSDictionary *lastSentData = @{@"msgs":messageIDDict,@"sender": toHash,@"lastSender":[[AuthDataStore sharedAuth] pushKey], @"text" : messageInput, @"ack":@"ok", @"time":[NSNumber numberWithInt:timeStamp]};
   [lastData updateChildValues:lastSentData];

Android代码

 //Note: receiverinbox and notificationMsgs are hashmaps;
 Firebase mNotificationref=new Firebase(FIREBASE_URL+"/notifications");
 receiverinbox.put("sender",userid);
 receiverinbox.put("text", input));
 receiverinbox.put("time", Utilities.getCurrentTime());
 receiverinbox.put("ack","no");
 notificationMsgs.put(messagepush,placeholder); // messagepush is firebase pushid, placeholder is not null
 receiverinbox.put("msgs",notificationMsgs);

 mNotificationref.child(chatwithid).child(userhash).child("inbox").updateChildren(receiverinbox);

Angular JS

 var msgsVal = {};
 msgsval[msgId] = {placeholder : 1}; // MsgID is firebase pushkey
 var rcvrNotificationConvRef = new Firebase(sessionURL + '/notifications/' + $scope.ustoId + '/' + msgkey);
 rcvrNotificationConvRef.child('inbox').update({
 sender: sender,
 time: time,
 text: msgintext,
 ack: 'No',
 lastSender: $scope.usLoggedUserId,
 msgs : msgsVal
 });

Answer 1

在Android中，我们可以使用push()方法将数据附加到多用户应用程序中的列表中。每次将新子项添加到指定的Firebase参考时，push() method都会生成唯一键。

Firebase updateChildValues适用于IOS，但不适用于Web和Android

1 个答案: