How to get data from querysnapshot flutter. Below is Screenshot and the code.
- How to get data from querysnapshot flutter Below is Screenshot and the code. userId). collection('users'). Ask Question Asked 3 years, 3 months ago. Now, you have to iterate over the array of documents and use the data member that gives all the data of this snapshot. At the moment if my data change in Firestore then my list in StoriesListScreen will automatically be updated because it uses a Stream<QuerySnapshot>. key}); @override State This code should work. So if you want the documentSnapshot of every users in your 'users' collection, you will have to iterate over snapshot. I want to get the data through a where query within a second StreamBuilder but I can't access the values I only get StreamBuilder<QuerySnapshot<Object?>> returned. get(); List<Object?> data = snapshot. Hot Network Questions Looks like maybe because you got a stream builder, so the Snapshot is a AsyncSnapshot<dynamic>, when you grab its . To get a specific field, you'll want to cast the data() to a Map and then look up that field: var data = querySnapshot. Since you're not accessing specific data of the document snapshot, you get its default toString implementation, which apparently just shows the class name. So if you want to match all timestamps for an entire day, that is a range of timestamp values. body: new StreamBuilder( stream: Guys how can i retrieve a specific document from QuerySnapshot. snapshots(); } i use this method. doc(document. collection('products'). map((e) { return e. . else { List<ModelProduct> genericProductList = []; QuerySnapshot querySnapshot = snapshot. data() as Map); return QuerySnapshot qurySnapshot = await userCollection. As mentioned the thread, you can go through the following code on retrieving data through streambuilder :. 1. docs. I have . Timestamp objects in Firestore are very specific points in time, with a microsecond precision. 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<void> _getUser In your first code snippet you are printing element, which are instances of the QueryDocumentSnapshot class. docs) { var docData = doc. collection('sub This tutorial demonstrates how to integrate Firebase Firestore with Flutter for effective product data management. data!. Future<Stream In flutter, I use Firebase Firestore to save data. How can I put a list of snapShot of String in array inside the DropdownButton flutter. docs[0)['fieldName']); Simplify data retrieval from Firebase in Flutter with our step-by-step guide. document(user. data. docs returns an array of all the documents in the QuerySnapshot and obviously it's not a type of Food. Modified 3 years, 3 months ago. 0. snapshot. A bit more meaningful be to print the document id: I am trying to map a DocumentSnap from Firebase to a Json Class in Flutter. snapshots() . You can use FutureBuilder like this: class LoadDataFromFirestore extends StatefulWidget { const LoadDataFromFirestore({super. If you want to repeatedly get all your UserTasks after each change, then using a Stream makes sense. contains(query)); in the following streamBuilder to fetch users by their email. data, you get a dynamic, which returns a DocumentSnapshot, which then you need to call . Try to write your animals with get so it runs code written there only when you get animals but not on initialization:. from(querySnaphost. documents. forEach((doc) flutter/firebase/dart: get data from firestore. docs[0]. getDocuments() – Situation: In submission page, user have to select society name (dropdown menu), enter title, attach file, and submit it. I tried to get all users all books with a button click as below A QuerySnapshot contains zero or more DocumentSnapshot objects representing the results of a query. Viewed 2k times 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 could retrieve data from the first collection through a StreamBuilder without any problems. Discover how to get data from Firebase in Flutter efficiently. orderBy('createdate') . id. get(); print(qurySnapshot. How to get document id in firestore flutter using QuerySnapshot. builder: (context, snapshot) { final DocumentSnapshot ds = snapshot. first. The typical approach is to create a timestamp of one day later, and then add that to the second clause needed for the range: I have a collection and Subcollection, I want to get the data of subcollection along with main collection data. Stream<QuerySnapshot> get animals => FirebaseFirestore. It unfortunately does so as a generic type T?, which is probably where you are struggling. docs can contain zero, 1 or more documents matching the criteria. data; querySnapshot. Notice the plural there. where((u) => u['email']. Following is my code for query. where('uid', isEqualTo: In my Flutter app, I'm trying to get the data from a Document in Firestore. docs? I once get all documents of a collection. snapshots(), builder: (context, 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 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 Your uid is set in initState() that calls after the class is initialized. Using that data you could convert it to any type of instance you wish. I want to get that document specifically from this QuerySnapshot since i don't want to be messed with await later in my code. 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. How to fetch specific data from querysnapshot in flutter. I can confirm that my is getting the data from the document, but i cannot pass the gathered data to my Json object. I passed to the Profile class a snapshot document, and I want to indicate the index of my document, but I d 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, Get early access and see previews of new features. After user submit the file, the file will be stored in firebase storage, and This is how I get data using stream builder from firebase StreamBuilder<QuerySnapshot>( stream: Firestore. and I need to update my data as well. Here's the data I want to get : The problem was that I was trying to fetch data from a DocumentSnapshot using a StreamBuilder<QuerySnapshot> instead of StreamBuilder<DocumentSnapshot> Here's how I solved it : I am trying to get data (In real-time) from my database using QuerySnapshot. I am using collectionGroup query, but don't know how to get subcollection's data. data()[FIELD_NAME] during the map setup. data() as Map; var value = data["userId"]; So if I could get a List at the beginig I can save many requests to get the brand data from cloud firestore. This is a list of document snapshots. listen((QuerySnapshot collection) { // consume the collection being streamed / listened to for (var doc in collection. To remove that warning you need to change in your code the doc[FIELD_NAME] structure to doc. If you simply want to get all your UserTasks once, you should have a Future instead of a Stream. From here to get the document id (in your case uid) simply use snapshot. data!docs[0]. In my flutter app, i am using firebase too, and i am successfully bring data with that code QuerySnapshot querySnapshot = await Firestore. id). This is happening because you are not properly geting the data from the firestore to be set on you map. The documents can be accessed as an array via the docs property or enumerated using the forEach method. documents . Hot Network Questions How to fetch specific data from querysnapshot in flutter. I'm away from You’ll need to cast that to a Map<String, dynamic> to then be able to get the individual fields from it: var data = Map<String,dynamic>. 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 gravitational waves After running our Flutter app, in the firestore database created in Firebase console, it creates the collection city_data and adds the first document with data as above. 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. collection('groups'). instance . StreamBuilder<QuerySnapshot>( stream: FirebaseFirestore. 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 I'm new to flutter and I'm trying to pass a firestore document snapshot to another class. This is my Firebase Cloud Firestore. 3. It currently shows the contact details for all registered accounts. collection("collection name"). Since you said you want to get a List<UserTask>, I'm assuming you want to get the collection of UserTasks only once. instance. collection('leaderboard'). Accessing documents using StreamBuilder in Flutter 2. collection('animal') . snapshots() which is a QuerySnapshot, meaning, a List of QueryDocumentSnapshot which Extends DocumentSnapshot. Calling data() on a DocumentSnapshot, gives you all the fields from that document. So just use map to transform your Snapshots into Lists. data() as Map<String, dynamic>; // do what you want with your data here } }); Your stream is FirebaseFirestore. snapshots How to get data from firestore using flutter streams. You can do: FirebaseFirestore. Getting firebase data in a stream. where("uid", isEqualTo: uid). collection('profile') . How to display data from an API in a dropdown menu. I'm trying to make a flutter app that allows users to log into an account and then store contact details in a firebase firestore. I created the root collection as Users and in that collection, each user has a subcollection named by Books. i have this streamBuilder to populate the data on screen I am wondering how to get data from firestore to my Flutter app using the StreamBuilder. data(); }). data; In order to implement stream builder with cloud firestore to retrieve field data, you can follow the StreamBuilder Documentation and link related to explanation of streambuilder in flutter. how to get document id Firestore. So, instead of this Stream<QuerySnapshot> fetchUsersInSearch() { return Firestore. toList(); Map<dynamic, dynamic> userData = data[0] as Map; What is a Document, how to create one and refer it while querying the data? What is a QuerySnapshot, DocumentSnapshot and AsyncSnapshot ? final QuerySnapshot<Map<String, dynamic>> questionsQuery = await FirebaseFirestore. So you get uid before it is set. We’ll cover setting up Firestore, creating a data model, You could use this for flutter : FirebaseAnimatedList( query: databaseRef, itemBuilder: (BuildContext context, DataSnapshot snapshot, Animation<double> animation, int index) { You have a Stream<AsyncSnapshot<QuerySnapshot>> now, and you want a Stream<List<String>>. The snapshot. collection('user_groups'). data on this object to get the proper Map<String, dynamic> data. final emailResults = snapshot. This is how I get data from QuerySnapshot: QuerySnapshot snapshot = await userCollection. docs: But if you want to get the document of a particular user, then I want to implement OR condition in flutter using the multiple where(); method but this returns AND condition. Get user details from a dropdown list. However, I cannnot retrieve data from the second collection. uswaz nmlv siizdm fbm cgfb yvhukpi eesu ibnns vaa nizdq