Orderbychild firebase android. orderByChild("name"), the app crashed.

Orderbychild firebase android I want to do a request like this: I was using the oderbyChild("date") to oder my data from the nearest date to the farest by doing this. To access a value in your database, you create a DatabaseReference for that location. Full Playlist:https://www. I am following documentation for Saving and retrieving Why does the same query (Query queryRef = myFirebaseRef. equalTo("abc_xyz"); query. Votes are accounted for in the vote_count field of my Firebase database. MM. Anyone can teach me how to write this condition in I was trying to implement Firebase in android, I have few queries in that, I would be glad if you would help me into this. Firebase I am using Firebase and I need to sort data by the username but the problem that I'am using these method below and I couldn't understand where can I use the "orderByChild" method: Here's my json (I have edited manually for hiding some secret data's): Android Firebase orderByChild query. startAt(queryText) . This is my database structure: Users - Uid - online : true i want to get list of users which are online without n. Simple Android / Firebase orderByChild / equalTo. endAt(queryText+"\uf8ff") The character \uf8ff used in the I'm unfortunately not sure if there's an equivalent client/db separation in the Android version like DatabaseReference myRef = FirebaseDatabase. Sort in Ascendening order in Firebase. If you want to order on a child property of those nodes (i. equalTo(mobinputtext. addListenerForSingleValueEvent()? Get children using orderByChild-equalsTo in Firebase-Android. toString()); Share. Query qChatMessages = mDbRefMessages . 1973. I have news data in Firebase in following format: I want to sort it according to date (newsDate) in descending order (latest on the top). Firebase data order. orderByValue in child [Firebase Database Android] 0. const userPostsRef = database. orderByChild("orderStatus"). Because Firebase generates a unique key Firebase orderByChild and equalTo() queries don't work. orderByChild("fullName"). startAt(name, previousLastKey). Edit: It is probably because I am storing the value as a string and not an int. getInstance(). If your data query is too large to sort client side you can do. Firebase how to set orderByChild more than one. orderByChild() This method is used to order the results of a query based on the specified child key. The event callback is passed a snapshot containing all data at that location, including child data. Firebase and Android: Order Query Results. My firebase data structure is mentioned below. Modified 6 years, 3 months ago. LimitToLast(10) to get the 10 most viewed nodes. Ask Question Asked 7 years, 11 months ago. use orderByChild()), that property must exist at a fixed path under each child nodes. Sorting firebase database by timestamp under a key. let say, my post titles are 1,2,3,4,5. So the snapshot contains a list of those results. Query query = ref. I am trying to use Firebase in my android application. ref('books'). 41. How to lazy load images in ListView in Android. Sort by key. getReference("users"). Querying has been a frequently requested feature and we’ve made great strides based on developer feedback since our beta release last month. Here I want to select all the node with value "stop" and delete them. Go through each node at the specific database reference, adding each ModelClass to an arraylist. Retrieving data I'm working with an Android App that functions as an instant messaging service, and I'm at the point of pulling the message data through into a RecyclerView. 3. Commented Oct 3, 2020 at 8:13. I'm looking for a way to get my data sorted into a RecyclerView. mDatabaseReference = FirebaseDatabase. orderByChild("hotel"). orderByChild() is not working in Firebase Database. setValue(value) executes before the listener has fired and updated value. Your call to mRef. orderByChild Per "Firebase's: Save Data on Android": You can use the reference to the new data returned by the push() method to get the value of the child's auto-generated key or set data for the child. How to do order by child inside another child Firebase. equalTo(passed,dbRef2. orderByChild("id"). To construct a query in your database, you start by specifying how you want your data to be ordered using one of the ordering functions: orderByChild(), orderByKey(), or Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Multiple orderbychild() queries is not supported by firebase . If this user has the medical history of diabetes will display something not allow the user to buy. Using orderByChild(), you can sort the data by any child (think about the child key as a column name When using orderByChild(), data that contains the specified child key is ordered as follows: Children with a null value for the specified child key come first. I tried orderByChild("age"). Modified 4 The problem is likely here: Query query = dbRef. If you keep the Strings, as I see in your screenshot, you need to know that the Strings are ordered lexicographically and I'm sure this is not what you are looking for. Below is a snapshot of the data that I'm trying to order: (total is off for the sake of . I know that firebase does not allow multiple orderByChild query, so twe have to restructure the code to achieve the same effect. Android Firebase orderByChild query. Example: LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity()); layoutManager. , the second parameter to equalTo is used to further limit the results returned. Android Firebase multiple sort. limitToLast(2) and then invert the results from there. keepSynced(true); productQuery = When using orderByChild(), data that contains the specified child key is ordered as follows: Children with a null value for the specified child key come first. Hot Network Questions Paper got rejected without feedback Android - Order Firebase Array by timestamp. getReference() . Firebase orderBy timestamp not actually ordering. This is what I've came up with: mDatabase. orderByChild("last_time_stamp"). So: ref. Firebase orderbychild(). youtube. It is not possible to sort the values in descending order directly from Firebase. Sort by value. Today we’re launching enhanced query support across our iOS, Android, and Web clients, and the Firebase REST API!You can now query your data by any child key in Firebase. This does make your database open to anyone, even people not using your app, so be sure to restrict your database again when you set up I want to get all the nodes from a Firebase realtime database where the search result is matched with Query query = reference. For example, orderByChild('age') would order the results based on the To fetch a list of items in some specific order Firebase offers three methods — orderByChild, orderByKey and orderByValue. e. OrderByChild adding one more element to the result. I Unfortunately, orderByChild() does not work on multiple same fields at once, so you may have to do the job in two steps. Here is my Firebase Database: I am using orderByChild query to filter result and I need fetch only the distance value. historicoRef. orderByValue in child [Firebase Database Android] 3. This question is in a collective: a subcommunity Multiple orderbychild() queries is not supported by firebase . Firebase's orderBychild(). orderByValue in child [Firebase Database Android] 5. This says. child("users"); users. I need to find the existing Child inside the Random Key and I have used OrderByChild() and EqualTo() to filter the queries but it behaves soo weird that for sometimes it showing child exists for only one Child and for sometimes it doesnot work. Approach A. What is 'Context' on Android? 2091. UPDATE. How to get screen dimensions I want to read back the data in Firebase which is medical = "Diabetes" which key in by the user. By default Firebase orders the results ascending. orderByChild("messageChat") A Firebase Database query inspects the child nodes directly under the location that you execute it on. How to OrderByKey and You no need to use orderByChild() here in your case because firebase itself generate unique key which is based on a timestamp, so you can simply use orderByKey() in your query and you will get your data in latest order. When I push data from device to Firebase I'm populating timestamp with currentTime and store in long data type. Children with a value of DatabasePagingSource (and therefore also FirebaseRecyclerPagingAdapter) not working when firebase query contains orderByChild clause. This practice is called denormalization and is a common practice when it comes to Firebase. It does not however make it easy to find the groups for a given user. When I do retrieving the data with firebaseRef. equals is not fetching any data. equalTo() android kotlin Hot Network Questions Cases where a misunderstanding in mathematics led to misunderstanding of the physics? Android Firebase orderByChild query. backend. I know the orderbykey() or getChildren() gets the data with the inserted order, but I am trying to do for the order both children menus and menuitems. In this way, you can query using ". Firebase data sorting by date stamp. child(User. setReverseLayout(true); Android Firebase orderByChild query. Look at these links to structure your database. addValueEventListener(new I have a String stationName and I want to fetch distance from FireBase according to the stationName I provided. i tried doing that and nothing has changed because i don't know where should i be using it in the c Skip to main content. Firebase orderByChild not working. Imagine you have this in your base: { userId: { firstName: 'Jon', lastName: 'Snow', birthYear: 283 } } I have this code which gets the value of distance between user's localition and location of object from the Firebase Database, i want to order by "distanceKm Android firebase query with Firebase how to use orderbychild. I have read the firebase documentation but there is no example of this, there are only examples of orderByKey and orderByChild. Get children using orderByChild-equalsTo in Firebase-Android. Sometimes it's the simplest thing. unspecified index when searching data with firebase cloud function on nested object running nested Query. . Problem with firebase query orderByChild(). To construct a query in your database, you start by specifying how you want your data 1. orderByChild("timestamp"). FIREBASE_URL_USER_TASKS). equalTo("gooner");) returns different results in queryRef. If that is not working: You've included a picture of the JSON tree in your question. I just cannot find how to do this properly. How to sort data ascending order Firebase Database. I'm Working with stock management project and my client want sales of stock in ascending and descending order. Here is the firebase data structure. For a better understanding, I recommend you see this video, Denormalization is normal with the Firebase Realtime Database. addChildEventListener(new #orderbychild #orderbyvalue Easy Tutorial on Firebase Database Query. ref(`userPosts/${u Firebase listeners fire asynchronously. * Creates a query constrained to only return child I am storing data in Firebase storage. I'm using firebase on my android app. So with this approach the last item on page 1 becomes your "anchor" item From what you explained, you only want to reverse the order of your list. Each post contain firebase servervalue timestamp in createdAt. Firebase firebase = new Firebase(Constants. DatabaseReference conversationReference = mFirebaseDatabaseReference . Change your code like this: public void addTen(View view) { mRef = new Firebase(my_private_url); mRef. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Firebase users = myFirebaseRef. Documentation can be seen here My firebase data structure is mentioned below . An other way to do kind of multiple orderByChild in Firebase is to create an orderKey. With Firebase database queries, you can selectively retrieve data based on various factors. This can be easily done using a comparator. 0. orderByChild("value"). sort(list, compare); I know i should use booksInstance. Issue with firebase realtime DB, equalTo() with react native expo. Children with a value of With Firebase database queries, you can selectively retrieve data based on various factors. Hot Network Questions What about capitals at the start of a non-noun What you are not Ok so I found the answer to this question and I am writing it so others may benefit from it. If you use a ChildEventListener: I am trying to log in using firebase database, Query myquery = muserprofilestab. equalTo("48bde8f8-3b66-40bc-b988-566ccc77335c", "user"); I highly recommend that you first read the Firebase programming guide for Android (95% of it applies to regular Java too). If you want to query date ranges, you should store them in a format that allows querying ranges. addValueEventListener(new ValueEventListener() Android firebase query with multiple orderBy. In one case I want to use OrderByKey (because I want new questions first and keys are generated using push feature) to sort the data, in another case I am using OrderByChild (because I want to sort using timestamp and in this case I don't use push but I use uid of the user as key). Here are three references to locations in your database: DatabaseReference zonesRef = FirebaseDatabase. 5. You can then combine these with five other methods to conduct complex queries: limitToFirst(), In the child_added event example, you get user data one by one. When i do this query. I have Stock structure as below I want to sort the data as per the sales of the prod There is no orderBy() function in the Android Studio query. orderByChild('ups'). I need help to find an issue to my trouble. var person = snap. Android Firebase Realtime Database orderByChild is not working. What is I have a list of post. val(); When using the Firebase Realtime Database we were trying to get a DatabaseReference like this mFirebaseDatabaseReference. At this moment I'm using the priority method for this, but I know that it is better to apply a orderByChild or orderByValue method to achieve this. READ_SENDER and combine data for both and use query like this - I'm using Firebase for Android and found that the orderByChild("key") method does not seem to work on an array; I'm trying to retrieve all award_yearentries, ordered by their year value. I would be very grateful if someone could help me. child("ZONE_1"); DatabaseReference zone1NameRef = zone1Ref. limitToFirst(limit) When there are multiple children with the same value for name, the query will start at the one with the key you specified. I'm working with firebase and I need to sort things saved by timestamp. child("users"). child(CONV_DETAILS). You should be able to OrderByChild("Views"). Android firebase apply multiple queries. orderByChild("filter"). child(USERS). equalTo("some id here") . Ordering of data with Firebase Android. orderByChild("user"). com/watch?v=AODKin3OHTw&list=PLc3OjfRG7xkup0zbdo7E Android Firebase OrderByChild limitToLast is not working. Your current structure makes it easy to find the members of a given group. equalTo(0)" and you'll get the desired results. Query I am trying to order and filter the data using firebase realtime database. How to order by child value in Firebase. Hot Network Questions Firebase Query is used for sorting. Android FIrebase- Querying by Value does not work. I've tried with two values deliveredBy (boolean) and deliveredBy (long). Ask Question Asked 4 years, 6 months ago. orderByChild("points") A basic Firebase query starts with one of our orderBy functions: orderByChild(), orderByKey() or orderByPriority(). Query based on multiple where clauses in Firebase In the above code, as you can see I am generating Log to check if data is fetched from the firebase, but I got no output Android monitor. I am trying, but I am stuck on how to do so. Take a look at Official Documentation on Retrieveing Data from Firebase Realtime Database. javascript; Android - Firebase order by value. This method is triggered once when the listener is attached and again every time the data, including children, changes. firebase orderbychild equalTo. To get started without setting up Authentication, you can configure your rules for public access. Getting bit confused in it. I have no idea how can I implement Firebase Scrolling in my list view. orderByChild("uname_usuername"). That way if you want to get all posts for January, you I'm trying to get some data of Firebase. Sort by priority. It does not indicate the name of the property to filter on, which you may Actually i want to get online users only not the whole list of users. child(mFirebaseUser. I have generally just reversed the order of the results returned client side. addChildEventListener() and queryRef. orderByChild and a child has a specific value. equalto() showing null. child("ZNAME"); This doesn't directly answer the original question, but for anyone using FirebaseUI Java/Android, with a RecyclerView, it's possible to order the RecyclerView in reverse, rather than using a query on Firebase:. 2. In my android application I am using following code FirebaseDatabase database = FirebaseDatabase. Why firebase orderByChild doesn't work on timestamp? 0. getUid()). I recommend switching to yyyy-MM-dd, so 2019-01-09. However, if you need a descending order, please see my answer from the following post: How to arrange firebase database data in ascending or descending Keep the key of the last item you show, then pass that in as the second parameter to startAt(). child("location"). USER_CHILD). I have checked the datasnapshot, they are coming from Firebase unordered. getReference("ZONES"); DatabaseReference zone1Ref = zonesRef. Firebase OrderByChild() and EqualTo() is not working properly. yyyy string, which is not lexicographically sortable. 2267. orderByChild("createdAt"). Mobile Development Collective Join the discussion. Firebase Orderby Query not If you want to order the results of a Firebase database query, you need to use numbers as values and not Strings. So here is my question. The simplest way to order data in ascending or descending order, would be on client side. database(). I want to implement the Android Searchview function in a listview fragment populated with data from a Firebase Database. getText(). orderByChild("Mobile number"). child(Utils. child("Coupon"). 1. You currently store dates as a dd. reverseOrder(); // Sorting the list taking into account the comparator Collections. The unique key is based on a timestamp, so list items will automatically be ordered chronologically. orderByChild("name"), the app crashed. – Ameerul. Firebase's orderBychild() You cannot search for any item whose title contains #Yahoo. For dates that would be either a timestamp or a string that is lexicographically sortable. First you can run an orderByChild() query looking for the currentUserId and then add all those that Unfortunately firebase doesn't allow returning by descending order. encodeEmail(unProcessedEmail)); Hey there, @pautena and I are developing an Android app with a Firebase backend at Hack The North 2016. See: How to perform sql "LIKE" operation on firebase? You can however search items whose title begins with #Yahoo:. getReference(); mDatabaseReference. Firebase how to use orderbychild. In your case, you have two nested dynamic children, which means you: This is My Firebase database structure i want to get data like category = "cat" and level = "1" Here is my code Query query = firebaseReference Get children using orderByChild-equalsTo in Firebase-Android. I'm trying to sort the restaurants by the average rating with orderByChild() but instead of returning them by sorting them by average rating it doesn't. orderByChild("newsDate"). Here is my code: public void filterQuality Skip to main content. Firebase Query - how to order by a separate field? 0. I am showing Firebase chat in listview in which I want to only load 1st 100 messages from firebase after that User will do pull-to-refresh then load 1st 200 messages and I am developing an Android chat application in which I need to order the conversation details by the date. I'm tring to do orderby(). getDatabaseReference(); Query searchQuery = myRef. You can use the onDataChange() method to read a static snapshot of the contents at a given path, as they existed at the time of the event. I think this is a common problem for those who implement infinite-scroll in recycler view/ list view. Sort by child. I have the following . Here's my workaround code anyway, in case you need the number stored as a string for whatever reason. getInstance(); ref = database. I have added this to my code while I am retrieving data from Firebase: databaseReference. I have tried the following approaches. I have my Firebase Query object returning all the messages that match the id of the chat that has been loaded, this is done like so:. We've faced this problem and we think that could be nice to solve with a new feature in future versions: When using the I have a data structure (see below) and I essentially want to create a "trending" section that emphasizes the items that have the most votes. Defining DatabaseReference. equalTo() but I'm always getting null in my query. firebase. child Get children using orderByChild-equalsTo in Firebase-Android. But the addListener method must be applied directly to the object returned by the chain of orderByChild(), startAt(), and endAt() methods, and not in a new statement on the DatabaseReference retrieved with . getRef(); I have a node with a list of user scores in a Firebase DB, I would like to order the list from highest to lowest and show only the top 10 scores: My leaderboard node: Ordering of data with Firebase Android. In this example we’ll use orderByChild. Object Comment with attribute timestamp. Hot Network Questions How manage inventory discrepancies due to measurement errors in warehouse management systems I'm running into a weird issues in which a Firebase query using orderByChild() doesn't actually order the data. Code to get the Firebase Data mPOIAdapter = new FirebaseListAdapter< databaseReference. limitToLast(15) result is not sorting how I expected. toString()); In case there are multiple nodes with the same filter value. Order Firestore data by TimeStamp in Ascending order. child("awards"). Now I want to retrieve and show the data on the latest date on my RecyclerView from Firebase Realtime Database based on timestamp. However, you can create a custom layout and create the view in reverse order. How to OrderByKey and OrderByChild Firebase. orderByChild("idUsuario "). addListenerForSingleValueEvent(new How to search for a values of Child in firebase Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company How to save the current date/time when I add new value to Firebase Realtime Database; To see how to add a timestamp property to your object. orderByChild('name'). Viewed 4k times Part of Mobile Development and Google Cloud Collectives 2 This is my data on Firebase- app-<br /> When you execute a query against the Firebase Database, there will potentially be multiple results. Please replace that with the actual JSON as text, which you can easily get by clicking the Export JSON link in the overflow menu (⠇) of your Firebase Database console. MyApplication. addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(DataSnapshot dataSnapshot) { Your use of orderBy(), startAt(), and endAt() is correct according to the documentation. Even if there is only a single result, the snapshot will contain a list of one result. Google Cloud Collective Join the discussion. I was using an older technique wherein I was finding from datasnapshot my apps using their parents' numbers and due to this, I was delibrately undoing the ordering. Firebase Database childs sorting. equalTo("yourSearchString"); To make this code work, you also have to add indexOn on your corresponding attribute in the rules (of Firebase Database console). Firebase query orderByChild. child(urls). I know there android; firebase; google-cloud-firestore; or ask your own question. Firebase orderByChild on startAt() and endAt() return wrong results. Firebase & Filtering ordering by value/key. orderByChild('_searchLastName') . Firebase sorting and filtering. addValueEventListener(new But, the menu and menuitems order are not in the same order as they are inserted from Firebase. Thanks. Now I want to filter the result for "READ"==FALSE AND "SENDER"==58490e9945f33364ac6cd7b1 Make a new key in your data i. A few hours spent in that guide, will save dozens of questions here. Note: By default, read and write access to your database is restricted so only authenticated users can read or write data. Retriving Data From Firebase In DataSnapshot ( Not In Sequence ) Related. // Defining the comparator Comparator compare = Collections. niicwpqf sfxbb vtnrhc flodwhu ilyqj rjjqn jacsb uedyw wvsovvn wtcwd