firebase-realtime-database

问题 Edit: Figured it out, check my posted answer if you're having similar issues. I know there are several questions about this issue, but none of their solutions are working for me. In my model class I have made sure to use List instead of Arraylist to avoid Firebase issues, but am still getting this error. It's a lot of code but most questions ask for all the code so I'll post it all. TemplateModelClass.java // I've used this basic model successfully many times. For the HashMaps<String, List

问题 I have written a Windows service in C# which connects to the Firebase Database and stores data. For connection and database communication, I use a NuGet Packages called "FirebaseAuthentification.net" and "FirebaseDatabase.net", both by StepUp Labs, Inc. On my test system, everything works fine. On the customer's system, there are firewall/procy restrictions which deny communication. We already opened Port 443 and are able to send a request, but the answer does not arrive. Old GCM Doc says: If

问题 In my iOS app, I have two Firebase-related functions that I want to call within viewDidLoad(). The first picks a random child with .queryOrderedByKey() and outputs the child's key as a string. The second uses that key and observeEventType to retrieve child values and store it in a dict. When I trigger these functions with a button in my UI, they work as expected. However, when I put both functions inside viewDidLoad(), I get this error: Terminating app due to uncaught exception

问题 How to create an array in the firebase 3.0 and perform the functions of append and delete in the array This is the data structure i am looking for:- 1-UserIds --0.) 12345 --1.) 678910 --2.) 1112131415 2-UserProfile --0.) 12345 -0.) userName : "Rayega" -1.) friends : ["Julian","Mary","Powers"] --1.) 678910 -0.) userName : "Morse" -1.) friends : ["Polme","Mary","Finn"] --2.) 1112131415 -0.) userName : "Tanya" -1.) friends : ["Ester","Hulio","Julian"] i want to create an array like UserIds and

问题 I need a data from one Firebase project's database in 2 iOS apps (with different bundle names). So, the question is: Is it possible to configure replication between 2 different Firebase project's databases? Or is it possible to use 1 Firebase project (1 database) for 2 ios apps? 回答1: There is no built-in feature to replicate Firebase Databases. I'm not aware of any tools that replicate between two Firebase Databases. The closest is probably making a backup from one database and restore to

问题 I need a data from one Firebase project's database in 2 iOS apps (with different bundle names). So, the question is: Is it possible to configure replication between 2 different Firebase project's databases? Or is it possible to use 1 Firebase project (1 database) for 2 ios apps? 回答1: There is no built-in feature to replicate Firebase Databases. I'm not aware of any tools that replicate between two Firebase Databases. The closest is probably making a backup from one database and restore to

问题 Currently I add a new post to my Firebase array by observing for the array first, appending my new post, and then updating the ref: REF_USER.child(UID).observeSingleEventOfType(.Value, withBlock: { snapshot in if !snapshot.exists() {return} if let dict = snapshot.value as? Dictionary<String, AnyObject>, let posts = dict["posts" as? [String] { posts.append(newPost) REF_USER.child(UID + "/posts").setValue(posts) } } Is there a way to skip the step of observing , and straight away update posts

问题 This question already has answers here : Firebase how to prevent duplicate entries atomically (4 answers) Closed 3 years ago . Here is my database structure for categories I want prevent duplicate data using Firebase rules here is my firebase rule { "rules": { ".read": "auth != null", ".write": "auth != null", "categories": { "$catid": { ".validate": "!root.child(newData.child('type').val()).exists()" } } } } When I am trying to insert again java it's inserting duplicate of java how do I

问题 Question I have this Firebase Realtime Database: { "groupUsers" : { "group1key" : { "user1key" : "admin" }, "group2key" : { "user1key" : "admin", "user2key" : "readonly", "user3key" : "readwrite" } } } In my Android app I query that like this DatabaseReference ref = FirebaseDatabase.getInstance().getReference("groupUsers"); ref.orderByChild(auth.getCurrentUser().getUid()).startAt("").addValueEventListener() {...} That produces the warning: Using an unspecified index. Consider adding ".indexOn

问题 How do I search for users based on their usernames? I have looked at numerous SO posts on this matter but am still unable to achieve what I want to do.. I have tried to apply what I saw in those posts and is shown below: DatabaseReference usersRef = FirebaseDatabase.getInstance().getReference("users"); usersRef.orderByChild("username") .startAt(queryText) .endAt(queryText+"\uf8ff"); usersRef.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange