How to get data from querysnapshot flutter By using DocumentSnapshot, you can get the document including document fields and its values. The unique key generated is prefixed with a client-generated timestamp so that the resulting list will be chronologically-sorted. The itemCount for the ListView. Instead you should create a single DropdownSearch widget, with all documents in the items property. map((DocumentSnapshot doc){ return doc. instance . Related questions. documents is also deprecated. 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 . toList(); print(list); Answered By – Henok Answer Checked By – Cary Denson (FlutterFixes In this article, we will take a look at some basic concepts used in FlutterFire’s cloud_firestore plugin and how to make use of various methods offered by it for data operations such as adding Retrieve List<DocumentSnapshot> from a snapshot. builder, which is inside a StreamBuilder&lt;QuerySnapshot&gt;. So how to display loading spinner or something to user until data gets loaded? This code should work. map((AsyncSnapshot<QuerySnapshot> snapshot) { if (snapshot. Modified 5 years, 2 months ago. Related. Hot Network Questions TikZ: Automatically get a good bounding box: reset the origin What effects would the instant release of large amounts of light have on the air? Invertibility of a matrix defined using inner product What is the ideal way for a This works in FlutterFire! I used DocumentSnapshot and await. get list from fireStore in flutter app with indexes. getData(), builder: (context, snapshot) { if (snapshot. id. From the docs: If no [path] is provided, an auto-generated ID is used. I cannot get the data The issue seems to be with your return type for categoryList. I am trying to use the GroupedListview() showing some data from Firebase cloud. Flutter - Get array from Firestore with FutureBuilder (using query) 0. Viewed 2k times Part of Google Cloud Collective 3 . The problem when the first times app loaded it takes few seconds to load data until that it show a blank screen. Now, as a Flutter beginner I find understanding how to handle collectionGroup queries quite StreamBuilder<QuerySnapshot>( stream: DatabaseMethods(). A DocumentSnapshot contains data read from a document in your Cloud Firestore database. It only happens only the first time. docs) { var docData = doc. hasData ? How to get data from firestore using flutter streams. static List categoryList() { final categorySnapshots = FirebaseFirestore. Ask Question Asked 3 years, 3 months ago. map and then convert the returned Iterable to a List using toList. Future<List<String>> categoryList async { return await final QuerySnapshot querySnapshot; ViewSchedule({@required this. uid}); // Get User stream Stream<DocumentSnapshot<Map<String, dynamic>>> get user { return usersCollection. The documents can be accessed as an array via the docs property or enumerated using the forEach method. I am looking for a way to display this more or less complex data in something like a Card-Widget with the information from each snapshot in my Flutter project. Since you said you want to get a List<UserTask>, I'm assuming you want to get the collection of UserTasks only once. map((json) => UserCheck. docs . dart (Where I retrieve user data) class DatabaseService { final String uid; DatabaseService({this. A bit more meaningful be to print the document id: I want to add data in my firestore like ->users(collection)->userid(document)->friends(collection) I want to add/fetch data from friends collection Here is my code: Future&lt;void&gt; _getUser Looks like maybe because you got a stream builder, so the Snapshot is a AsyncSnapshot<dynamic>, when you grab its . last, or . data!docs[0]. You're already doing that second part, but you'll have to change to using the snapshots() stream rather than get() to get the updates. My Users. Get data from firestore and put into list (flutter) 2. data() as Map<String, dynamic>; // do what you want with your data here } }); I am wondering how to get data from firestore to my Flutter app using the StreamBuilder. builder is snapshot. forEach that doesn't return a List, you should use List. collection('tasks'). snapshots(); List categories = []; On what platform are you running this app? And what plugin are you using to access Firestore? On iOS and Android the FlutterFire plugin should already be caching the data locally once you access it. Flutter + Firebase : Class 'QuerySnapshot' has no instance getter 'documents' 3. I am trying to get data (In real-time) from my database using QuerySnapshot. How to cast an Instance of QueryDocumentsnapshots into a List - Flutter, Firestore. I created the root collection as Users and in that collection, each user has a subcollection named by Books. Flutter firestore get stream of document ids from a collection. The following is an example QueryDocumentSnapshot called "week" that I get from Firestore with a StreamBuilder. Flutter Retrieving firestore collection using Stream. Use . querySnapshot. Using a snapshot listener to both get the initial data and listen to updates to that data. snapshots(), builder: I'm new to flutter and I'm trying to pass a firestore document snapshot to another class. 9,239 7 7 gold how to get data from The snapshot. An object can be created to map the data from Firestore. So if you want the documentSnapshot of every users in your 'users' collection, you will have to iterate over snapshot. contains(query)); in the following streamBuilder to fetch users by their email. I tried to get all users all books with a button click as below You can use FutureBuilder like this: class LoadDataFromFirestore extends StatefulWidget { const LoadDataFromFirestore({super. data?. You could use this for flutter : FirebaseAnimatedList( query: databaseRef, itemBuilder: (BuildContext context, DataSnapshot snapshot, Animation<double> animation, int index) { Stream<List<String>> userNames = fbStream. MaterialPageRoute( builder: (context) => ViewSchedule(querySnapshot:snapshot. So far, when I need I use cloud firestore with flutter and I successed to get all key/value from document but I don't successed to match only one id from doc here is my code: getgift() async { final firestoreIns If I have a collection called userNames and I use a firebase query to search for a document that a database field uid matches the current user ID, how do I print the document ID of the documents that When you load data from Firestore, you get a DocumentSnapshot for each document. Sticking to the Firebase and Flutter way, it is possible to use a Streambuilder inside a Streambuilder. I'm u How do I record the document ID and pass it into the Streambuilder's return system. But I'm not able to access the data. B How do I search through data in flutter app. If you simply want to get all your UserTasks once, you should have a Future instead of a Stream. 3 Retrieving Data with Stream<QuerySnapshot> in Firebase with Flutter. snapshots(); } i use this method. I was also looking on how to handle nested json objects in Flutter with Cloud Firestore and found your post. documents; print(_myDocCount. hasData) { final querySnaphost = snapshot. collection('user_groups'). Future<Stream You can do: FirebaseFirestore. This is my method and I don't know how to get my Your stream is FirebaseFirestore. getDocuments(); List<DocumentSnapshot> _myDocCount = _myDoc. How to query a list of Objects with Firebase in Flutter. Im trying to get something similar to; CollectionReference _events = FirebaseFirestore. builder: (context, snapshot) { final DocumentSnapshot ds = snapshot. map((doc) => To access the documents within a QuerySnapshot, call the docs property, which returns a List containing DocumentSnapshot classes. hasData) { return snapshot. 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 Yeah @RavitejaReddy I just gave you an explanation about why you were facing the problem. Here is an example of FutureBuilder<QuerySnapshot>( future: crud. collection('groups'). You are using List. This is a list of document snapshots. Please help. orderBy('createdate') . get(); // Get data from docs and convert map to List final allData = querySnapshot. collection('animal') . _Tags. With the informations you provided is hard to tell if the problem is that map['tags'] is not the right Future<List<DocumentSnapshot>> getData() async { var firestore = Firestore. As I solved my problem, maybe it helps you too: In the "fromJson"-factory of my model I had to parse every element in the list with jsonEncode and jsonDecode before adding it to the model. instance; QuerySnapshot qn = await firestore . data; Guys how can i retrieve a specific document from QuerySnapshot. . data, you get a dynamic, which returns a DocumentSnapshot, which then you need to call . docs can contain zero, 1 or more documents matching the criteria. collection('event'); Future<DocumentSnapshot<Event>> getEvent(String eventId) async { 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 So you get uid before it is set. Now, you have to iterate over the array of documents and use the data member that gives all the data of this snapshot. Since you're calling toString() on that here, you see the debug representation of the object in your UI: Flutter firestore QuerySnapshot has no instance of getter 'documents' in Android. docs. The search query is working fine. data; // Get query snapshot if List<Map<String, dynamic>> list = q. docs: But if you want to get the document of a particular user, then This is how I get data using stream builder from firebase StreamBuilder<QuerySnapshot>( stream: Firestore. orderBy('name') . If you want to repeatedly get all your UserTasks after each change, then using a Stream makes sense. length); // Count of Documents in Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. It works if I access the item in the list directly like element['tags'][0] Is there a way to get the 'tags' field to a list of Strings ? Or to get the size of the list to recreate it by separately getting each item? Timestamp objects in Firestore are very specific points in time, with a microsecond precision. The return type should be Future<List<String>>. Provide details and share your research! But avoid . then((myDocuments){ print("${myDocuments. _Users is not getting populated because you are using List. Since you're not accessing specific data of the document snapshot, you get its default toString implementation, which apparently just shows the class name. Firestore queries read from a single collection only, or from all collections with a given name. collection('product'). Improve this answer. Modified 3 years, 3 months ago. data()[FIELD_NAME] during the map setup. In this KB, we have explained using the Firestore data as an example. single in addition to await to get just a single element, and toList() should be removed. snapshots() . length. A value of type 'Future<QuerySnapshot<Map<String, dynamic>>>' can't be assigned to a variable of type 'QuerySnapshot<Object?>' Hot Network Questions Law of conservation of energy with 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 However, it does not output the actual data stored in the database. toList(); } else { At one point I have the snapshot (AsyncSnapshot object), access the data property to get a QuerySnapshot object, then access docs property to get List<DocumentSnapshots> QuerySnapshot querySnapshot = await productoComplementos. get(); List<Object?> data = snapshot. There is no way to include information from other (sub)collections within the same read operation. data));// pass querySnapshot here The argument type 'Future<QuerySnapshot<Map<String, dynamic>>>' can't be assigned to the parameter type 'Future<DocumentSnapshot<Object?>>? 1. collection(&quot;notifications&qu Stream<QuerySnapshot> fetchUsersInSearch() { return Firestore. first, . 1. I did not have the full access to the code. Learn more about Labs. It is useful for apps like chatting which requires frequent updates. value; I suggest you put a few more print statements in as strategic points to see what you are actually getting. What you're missing here is that json snapshot needs to be decoded before accessing the data as a Map. map( e => e. return Get early access and see previews of new features. i have this streamBuilder to populate the data on screen I'm new in flutter and i need help with this I'm trying to get data snapshot from Firestore collection but i need this snapshot result via document ID this the collection and document ID. In my flutter app, i am using firebase too, and i am successfully bring data with that code QuerySnapshot querySnapshot = await Firestore. instance. When you first open the stream on a collection, the data should be added to the cache. collection('products'). DocumentSnapshots have the info fields on a document and QuerySnapshot is a collection of DocumentSnapshots. Hot Network Questions Try using needsSnapshot. snapshots(); } } The widget that provides the stream is my Home Widget and have this code: If I'm reading this correctly, the problem abstracts to: how do you transform a stream of data which requires making an asynchronous call to modify data in the stream? In the context of the problem, the stream of data is a list of messages, and the async call is to fetch the user data and update the messages with this data in the stream. This is my Firebase Cloud Firestore. doc(uid). Write the data without concern for the UI updates. key}); @override State How to get document id in firestore flutter using QuerySnapshot. After doing the above, also change the There are different kind of implementations for this scenario, basically subcollections are located under one single document, the query identifies a group of documents, when you know that the query only identifies one document, the Firestore client doesn't know that, and even if it did, it doesn,t know the full path for that document. I want to get that document specifically from this QuerySnapshot since i don't want to be messed with await later in my code. getDocuments() – You're creating a DropdownSearch widget for each document. Using that data you could convert it to any type of instance you wish. snapshots(); I structured my firestore database as follow: to display the data in flutter i use streambuilder as follow: StreamBuilder&lt;QuerySnapshot&gt;( stream: Firestore. First you need to return a widget, next if you want to print the data then you need to check if the snapshot has data or no. I get to a point where I can retrieve the reserved timeslots on a given day (by hardcoding the day and passing it on to a futurebuilder), but when I try to retrieve data from a collectionGroup the listview stays empty (snapshot doesn't have data). data!. docs? I once get all documents of a collection. toList(); Share. This is how I get data from QuerySnapshot: QuerySnapshot snapshot = await userCollection. where("Title", isEqualTo: "Solo") . A QuerySnapshot contains zero or more DocumentSnapshot objects representing the results of a query. For last you can listen to data changes with Streams. docs returns an array of all the documents in the QuerySnapshot and obviously it's not a type of Food. class Users{ final String id; final String profileName; final String userName; final String url; final String @bsplosion (if I understood what you mean) you cannot read a specific field from a document. QuerySnapshot querySnapshot = snapshot. You're returning as List of Lists when the Stream only contains a single layer of List. In flutter, I use Firebase Firestore to save data. documents. where('uid', isEqualTo: uid) . getDocuments(); return qn. As an example, you can create an object for the 'text' data. final suscription = await Firestore. collection('users'). docs[i]. Now we can go ahead and tackle the situation. data; }). Firestore. document() when you calling this method without any path, it will create a random id for you. I want to implement OR condition in flutter using the multiple where(); method but this returns AND condition. value in the code line: Map<dynamic, dynamic> values = needsSnapshot. builder() everything is working fine. flutter/firebase/dart: get data from firestore. data()!['call'] What should I do to get the data stored in the database? (The field name is 'call') In your first code snippet you are printing element, which are instances of the QueryDocumentSnapshot class. Ask Question Asked 5 years, 2 months ago. 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 can I get the amount of items I have in this document field (ingredients) as integer? (in this case 5) I tried this: void countDocuments() async { QuerySnapshot _myDoc = await Firestore. I want to search for the user from his mobile number. The typical approach is to create a timestamp of one day later, and then add that to the second clause needed for the range: This is happening because you are not properly geting the data from the firestore to be set on you map. The data can be extracted with data() or get() to get a specific field. I passed to the Profile class a snapshot document, and I want to indicate the index of my document, but I d I could retrieve data from the first collection through a StreamBuilder without any problems. You can use methods like map(). data; Can you please help me? I need to load data from cloud firestore into a List<> and I need that before flutter runs the build() method. Following is my code for getting data from a firestore collection called posts. Here's the data I want to get : Firestore document's data I need to fetch that url from the Document. I am new to flutter. cast to do some type conversion and obtain Meeting. Follow answered Dec 13, 2019 at 2:18. I would like to do the same in StoryDetailsScreen but what I pass to the StoryDetailsScreen screen is not a Stream , it is a Story object that will not be updated. this is the form. I want to do is COLLECTION > SPECIFIC DOCUMENT I'M TRYING TO GET > FIELDS (MY ARRAY DATA). The idea is to have this list ready to use its values fr Skip to main content So if I could get a List at the beginig I can save many requests to get the brand data from cloud firestore. 0. how to search from data in api [flutter] 1. username). So if you want to match all timestamps for an entire day, that is a range of timestamp values. Asking for help, clarification, or responding to other answers. However, I cannnot retrieve data from the second collection. In your code it will always print null since this is asynchronous. As of now I have a code where it does what I'm trying to do but the problem it only gets the first data on my document. I get the following output: AsyncSnapshot<QuerySnapshot<Object? >>(ConnectionState. I created the necessary Boilerplate code I have the widget built and working and in the below code I am building a flutter app and using cloud-firestore, this is how my database looks like I want a function that retrieves all documents in the collection called "Driver List" in an array of strings that what I had already used but it gets them back in a listview in a new screen How add/fetch data from firestore using StreamBuilder<QuerySnapshot> in flutter? 0. snapshots() This return a Stream<QuerySnapshot>, if you change some data un firestore the data in the app updates. How to get document id in firestore flutter using QuerySnapshot. data(); }). If the user found then show his other information like Name, Surname. getDocuments. 2. flutter search from API Json. 2 How add/fetch data from firestore using StreamBuilder<QuerySnapshot> in flutter? How to get data from nested In my Flutter app, I'm trying to get the data from a Document in Firestore. dart file:. document(user. fromJson(json)). My code: 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 Situation: In submission page, user have to select society name (dropdown menu), enter title, attach file, and submit it. active,Instance of '_JsonQuerySnapshot',null, null). Following is my code for query. Thomas Thomas. Class 'Future<DocumentSnapshot<Map<String, dynamic>>>' has no instance method '[]' Hot Network Questions Why don't the Bene Gesserit retaliate against I have been trying to get data from Firestore in a ListView. But i dont get the GroupedListview working. Try to write your animals with get so it runs code written there only when you get animals but not on initialization: Stream<QuerySnapshot> get animals => FirebaseFirestore. first. That is, instead of using a FutureBuilder for the nested data, which makes you wait for each . collection('myColl I don't know how to access a field that is a list of Strings from QueryDocumentSnapshot object in flutter. collection('leaderboard'). I am creating app using Firebase. I'm currently having a problem on my code, where in I'm trying to get a specific data on my database. How to fetch specific data from querysnapshot in flutter. After user submit the file, the file will be stored in firebase storage, and How add/fetch data from firestore using StreamBuilder<QuerySnapshot> in flutter? 2 How to "append" firebase querysnapshots to a stream. where("uid", isEqualTo: uid). Example. Provide the data to the widget tree using StreamProvider. collection("LiveGames") . When i am using the normal Listview. I am trying to read the data from a list that has the data of Instance of '_JsonQuerySnapshot'. First, you have to get all the documents from that collection, then you can get the length of all the documents by document List. We will not provide Firebase access files and a key. It unfortunately does so as a generic type T?, which is probably where you are struggling. Stream Stream&lt;QuerySnapshot&gt; _stream1 = FirebaseFirestore. snapshot. To remove that warning you need to change in your code the doc[FIELD_NAME] structure to doc. To get a specific field, you'll want to cast the data() to a Map and then look up that field: var data = querySnapshot. length}"); }); 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 I am trying to fetch some menu item details such as menu name, slogan text icon, and verify data from firebase firestore using flutter but in the services of database getMenus() function, I am faci Meeting. collection('profile'). snapshots() which is a QuerySnapshot, meaning, a List of QueryDocumentSnapshot which Extends DocumentSnapshot. value instead of needsSnapshot. In the below code I am trying to get the data from DB getData() async { var db = FirebaseFirestore. toList(); Map<dynamic, dynamic> userData = data[0] as Map; Use Firebase QuerySnapshot to fetch data from Firebase Firestore in real-time. and I need to update my data as well. map((e) { return e. data on this object to get the proper Map<String, dynamic> data. documents . querySnapshot}) And then add the following change in your MaterialPageRoute. collection('categories') . final emailResults = snapshot. userId). Viewed 7k times Part of Google Cloud Collective 6 I'm building an app where the users can write into my db and ask questions to other users, database. 3. data. I want to get the data through a where query within a second At the moment if my data change in Firestore then my list in StoriesListScreen will automatically be updated because it uses a Stream<QuerySnapshot>. getChatRoomMessages(chatRoomId), builder: (context, AsyncSnapshot snapshot) { <<<< insert here return snapshot. And after some code, i want to get a document by its ID from that collection. So for example the first result can be in snapshot. where((u) => u['email']. documents; } I have extracted the data using this function getData() to use it in the FutureBuilder. how to get data from firebase in flutter. From here to get the document id (in your case uid) simply use snapshot. How to order data from Firestore in Flutter, orderBy not ordering correct. So, instead of this Notice the plural there. listen((QuerySnapshot collection) { // consume the collection being streamed / listened to for (var doc in collection. The only way if you have the document id, is to retrieve all the fields inside the documents, then display what you want. data() as Map; var value = data["userId"]; how to get data from firebase in flutter. The below could should get the job done. But subcollection data are not included in document snapshots because Firestore Calling data() on a DocumentSnapshot, gives you all the fields from that document. get request. The following steps explain how to load the data from the Firestore database for Flutter DataGrid: STEP 1: To get started with Firestore, refer to this link and create the database in Firestore. zwrg tndntm omyu qegrcy mnhfmxr wgfmi hpt qdof myarxu bxgq