firebase-realtime-database

问题 I want to use Fusionchart to read my Firebase data and create a chart in my web app. but my Firebase DB has a wrong structure, so the Fusionchart can't get data (my Firebase config is right). Following is the code that I write data to Firebase, num is a value increased in each loop. But as shown in the attached picture, the child's name is not added as a sequence number. Another question is I don't want the unique key inside the child 1, just six various inside the child one is ok. Any

问题 When I create an event, I do this: export const eventCreate = ({ title, time, location }) => { const newPostKey = firebase.database().ref('/events').push().key; const update = {}; const postDetails = { eventId: newPostKey, title, ... goingNumber: 1, ... }; update[`/events/${newPostKey}`] = postDetails; return (dispatch) => { firebase.database().ref() .update(update) .then(() => { dispatch({ type: EVENT_CREATE }); }) .then(() => newPostKey); }; }; in the database: later when I try to update

问题 I am having a similar issue in which I have my files as follow in which I want to be able to view all child items and add new child items. I understand that you will have to modify the code in the Java file, but I am having trouble understanding how to manipulate my own code and I tried to follow the confusing documentation provided by Firebase. Below is the structure of my database followed by my code. Any help would be greatly appreciated. The only problem I have now is how to properly

问题 Hi I'd like to know if there's a way to force the DB structure when using Firebase Console. For example I need to add an object with name: "Sample" and value: 3, then when I want to add another object i can only insert object with the same structure (name and value). Is there any way to achieve this? 回答1: There is no way to enforce a certain data structure when entering data using the Firebase Console. When you access the Firebase Database through the Firebase Console (console.firebase.google

问题 I'm using fire-base to retrieve nested data of users node, and while running query I'm facing this issue fetching data from fire-base database. Consider adding ".indexOn": "userId" at /users/YJdwgRO08nOmC5HdEokr1NqcATx1/following/users to your security rules for better performance. Database Structure: "users" : { "1vWvSXDQITMmKdUIY7SYoLA1MgU2" : { "userEmail" : "test2kawee@gmail.com", "userId" : "1vWvSXDQITMmKdUIY7SYoLA1MgU2", "userName" : "Malik Abdul Kawee", "userPhoneNumber" : "",

问题 Here is My simple query for firebase data using timestamp in android app Query recentStaticJobQuery = reference.child(AppConstants.WORKINDIA_JOBS) .child(AppConstants.WORKINDIA_STATIC_JOBS) .orderByChild(AppConstants.TIMESTAMP) .startAt(lastStaticJobSyncTime); recentStaticJobQuery.addListenerForSingleValueEvent (staticJobDownloadListener); ValueEventListener staticJobDownloadListener = new ValueEventListener() { @Override public void onDataChange(final DataSnapshot dataSnapshot) { Log.i(

问题 This question already has answers here : How can I sort an ArrayList of Strings in Java? (5 answers) Closed 4 years ago . This question is a follow up question from a previous post. Is there anyway to order the results alphabetically? I'm looking for something like Query 's orderByValue() . ... protected ArrayList<String> usernames = new ArrayList<>(); Firebase userRef = ref.child("users"); userRef.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange

问题 I try to push a new record to my Firebase. But everytime I receive a console error like this: $scope.contacts.$add is not a function Here is my code: app.controller('contactsCtrl',['$scope','$firebaseObject',function($scope,$firebaseObject){ var ref = new Firebase("https://<database_details>.firebaseio.com/contacts"); $scope.contacts = $firebaseObject(ref) $scope.addContact = function(){ $scope.contacts.$add({ name: $scope.name, address: $scope.address, telephone: $scope.telephone, company:

问题 I have events in firebase database table where each event has certain fields. One of the field is event_type . What I want to achieve is to be able to visualize in graphical form, how many events of each type comes daily? How do I do something like that in firebase database? Q1. Is it possible to directly do this in firebase? Q2. Do I need to move data to some other datasource (like Big query) and setup dashboard there? 回答1: It is definitely possible to create a dashboard with aggregate data

问题 Having some issues understanding firebase with Swift 3. I've remade my observer to look like this: currentUserFirebaseReference.observeSingleEvent(of: .value, with: { (snapshot: FIRDataSnapshot) in let UID = snapshot.key let dict = snapshot.value as! Dictionary<String,AnyObject> let pictureURL = dict["pictureURL"] as! String I used to just do observation..... in { let picture = snapshot.value!["pictureURL"] But now I guess you have to explicitly tell Firebase that you're dealing with a