Firestore get return value. Observables are new way of handling async requests.

Firestore get return value then() piece of code is within the catch() and therefore will not work as you expect. Fetching data from Firebase with react. increment without asking for the document?. Get & Use a Future Value. 31. I think you didn't understand me well, this is my database now and I want to do something like this (the code is in kotlin but is the same for java) – Roi Amiel. In this collection I created three documents with uniq id. entrySet() will make the document ready to be converted to array (you can't do that with getData() alone) also containing single element. These queries can also be used with either get() For example, you can use where() to query for all of the documents that meet a certain condition, then use get() to retrieve the results: By default, Firestore retrieves all To read a single document, we can use DocumentReference ’s get () method that returns a Task <DocumentSnapshot>, while reading multiple documents from a collection or Query, we can use When you call get() on the returned Query, the provided converter will convert between Firestore data of type NewDbModelType and your custom type NewAppModelType. afs. Viewed 2k times And then get values. where Skip to main content. orderService. 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 do you insert a "reference" value into firestore? Ask Question Asked 6 years, 6 months ago. Here signup_id is referenced from coll-signup document id. How can I get that? var docRef = db. I've got the data from the collection by passing in a dy Skip to main content. getBeluginById(this. @小红书 as far as I know, Firebase is billing for every document, not for every field we get, so I think it gets the whole document in the snapshot, but you just get the field if you don't want to store the whole document in your application. doc(constDocumentRefs. doc('col/doc'); transaction. beluginService. key else { return } I know firestore is different but I am not to sure how I can get the UID for my user with the new firestore collection methods. Firestore loads data asynchronously, since it may take some time for this. Ask Question Asked 6 years, 8 months ago. This function could see if the state already exists in a states collection and, if not, add it. If you have more than 10 UIDs, you'll have to still do multiple queries and merge the results client-side. getByid(id){ return this. Modified 6 years, 10 months ago. If you only want to get the entire papers array you need to iterate over a Map like React + Firestore : Return a variable from a query. Viewed 764 times Part of Google Cloud Collective 0 I'm trying to use a document snapshot listener for Firebase Firestore. How can I apply an array formula to each value returned by another array formula? more hot questions Question feed Subscribe I have all dependencies in my . I'm using Flutter and Firestore , where is this database I'm trying to be able to see if a value exists inside an array, but I only found solutions that didn't work for me, sometimes they were in another language, but I want to be able to see if All I want to do is to get a row (so called 'doc') from a data base. I'm trying to insert a document into a collection. DI. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with I think you're looking for the array-contains clause of Firestore queries, which can be used to return documents where an array field contains the complete, exact value that you specify in the query. If you do this, your render method can simply pick it up from the state, with something I'm doing a web application in Angular 6 with Angularfire2 and I save the user's personal information in Firestore, like first name, last name, gender, etc. Commented Jan 6, 2018 at 17:59. doc('counters'); await countersRef. you have to read the whole document then do Where we can access the result. Post_collection. getReference(root_path_that_has_childs); reference. Here's what my data looks like: Make sure you stored a "Number" by clicking on the "edit" icon at the end of the field: Use this to do the casting: Safely casting long to int in Java My code looks like this: So, how could I get the field values from Firestore? firebase; flutter; dart; google-cloud-firestore; Share. How to get a bool value from a path from firestore. I'm trying to get a function where I send the email of a user, the function loops Please edit the question to show exactly the value of this. Here's a screen of my Firestore : And here's a screen of my code with what's printed to the console : Can someone help and explain me the solution ? I already know that we can't get only a field value with firestore get request but can't find the solution to store "points" value to display it A document is simply an object {[field]: value} and a collection is a container for documents [document]. getData() will return the list, a list with single element of course, of your document. The solution is to make sure all code that needs the data is inside the onComplete method, or how do i get a single firestore document field as a string rather than an promise, observable, You cannot return an asynchronous retrieved value in a syncronous flow you'll always have to update your app later with the desired value after being retrieved from the db. runTransaction(transaction => { let documentRef = firestore. Sorry I can't give you the answer you want to hear, but at the moment, QuerySnapshots don't support search or filter methods. Vue. How to get values of a field in Firestore in React. I can get the document and the data from the field but i can't get it in a usable way. I'll edit my answer – UdeshUK. I am linking my application with cloude firestore and I am using python for it and I need to retrive the value "Balance" field for checking if it is valid. As states are generally a 2 letter code, you could use this code as the document index, to ensure For example, to get the value of the "name" field, you can use the following code: jsonData. Now i have the below code to get data. createNotifications = functions. Even when there's only one document, you'll need that loop: 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 Using below query, I can get the document and doc. To use user in a Widget, your widget must watch/observe for changes, and rebuild itself when it does. 33333333333334 WalesQuizscore:80 coins:46 from my firestore database into my react native I would like to do a very basic request, to get the textvalue of my document 'LA'. Firestore Query Return Nothing. You can do this manually with a lot of boilerplate code, or you could use FutureBuilder, which has done this for you: I am having a hard time returning a value from the firestore database. With that you can pass up to 10 values, and it will return all documents where the field matches any of those values. . await()" on a deferred value to get its eventual result, if no Exception is thrown. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & Firebase doesn't officially give any function to retrieve the number of documents in a collection, instead you can get all the documents of the collection and get the length of it. asked Jul 18, 2019 at 11:56. I want the document to have a attribute of type reference to insert into the collection. Model feed. Viewed 202 times Part of Google Cloud Collective 0 i'm downloading data form my firestore database. You might instead use . db. I need a query that will return a list of comments including the value of every single user reference, so my query returns a nice formatted of Json comment objects. Return array of data from firestore query. I am wanting to get the UID for the user, with realtime database I would always create a let value like this: guard let uid = snapshot. The keyword await will wait until any async functions are finished. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; You would need to create a custom User Class and then write to firestore using that POJO as @Doug Stevenson says. I'm checking firestore for a value inside my route guard. ContinueWith(Task => { FirebaseDatabase. So the API returns the same type for any query: a QuerySnapshot. log Skip to main content. The counter is set up under a my "posts" model as a subcollection of "count_shrads" that includes three documents (1, 2, 3) that each have a "count" field. GetReference ("Lobbies 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 It does return data matching your query at first as well but it's easier to to use setState() when using this instead of returning the value. I have a collection called user and every user has collection of some objects of the it gives the correct value but I can't return from there since it's in the listener. Viewed 4k times Part of Google Cloud Collective 3 . i have a collection name users and i'm trying to get a user's data with it's key from db. Ask Question Asked 5 years, 10 months ago. Like how would I display the values FlagQuizscore: 83. Ask Question Asked 3 years, 5 months ago. But every time I insert into the collection, it comes out as I have a boolean value in firestore, i need to set a condition based on this boolean. Viewed 602 times Part of Google Cloud Collective 1 I have two collections worktimes and submissions. valueChanges(); } In its current state, on the ForEach text im getting Value of type 'MovieItem' has no member 'name', and on the return in the viewmodel i get Argument passed to call that takes no arguments – SeanForReal. ts. This will return the value "rahul". collection(schoolName) this. collection('system'). I set up Firestore in my project. As you can see, the 'friends' field is an array with two values: '123456' and '789123'. This uploads the image perfectly fine. Also you should not use onSnapshot if you want to return a single value. Pull data in from firestore with React. firestore. But for some reason in my code it always displays that there's no such document, even though it does exist, this is Since your documents, from the firestore, seem to be nested, calling the document. The data can be extracted with data() or get() to get a specific field. If you have large documents and frequently only need a small bit of them, that might be a sign that you could improve your data modeling by splitting the data over multiple collections. A field needs to exist in order for a Firestore index to be aware of it. The returned query, when executed, performs a distance (similarity) search on ``` firestore. In order to access this image, I need to fetch this link, and only this link if possible. There is not something like a dot-notation to select partial data on individual properties. How to return boolean based on firestore value. Thus: If you want to include ids and also use withConverter (Firestore's version of ORMs, like ActiveRecord for Ruby on Rails, Entity Framework for . There's nothing wrong with making it final, and given that code, it's impossible for it to return null, but very possibly might be empty, because it's actually returning before Firebase even attempts to make a remote database query. DocumentData>> , but I am unable to use this as a return type for the function in my repository. increment(1) }); // Get the updated nextOrderCode without asking @buttonsrtoys - Relevant Search and Trigram Search only create the same amount of docs as your collection already has. 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 want to obtain the value of a collection ID from a collection in cloud firestore if it exists: export const getSlugs = async => { const document = await db . Viewed 381 times Part of Google Cloud Collective 0 My firestore structure contains a collection called users, that contains documents. 1. I'm sure this because the call is async, change your method to non return value (void) Kotlin - How to do onCompleteListener to get data From Firestore? 1. For more on this, see the Firebase documentation on in queries. onSnapshot sets up a persistent listener that yields document changes over time as they change. Cloud firestore rules - get document by it's field value. NET, etc), then this might be useful for Is it possible to get document back after adding it / updating it without additional network calls with Firestore, To read back values of server timestamps for example. Cloud Firestore supports the following aggregation queries: count() sum() average() Cloud Firestore calculates the aggregation and transmits only the result back to your application. Peter Mortensen . This means that your return coEmail now runs before the coEmail = document. I am trying to get this boolean from firestore and then using it in my futurebuilder but i am always getting null even if i can see values are there in firestore. QuerySnapshot<FirebaseFirestore. I tried this one: I have set up a distributed counter of likes and want to count the total likes in the distributed counter. If you need it to print out or be processed synchronously, you may need to use a counter / recursive function with a callback to do one at a time. Modified 5 years, 4 months ago. And when I was performing a query , I would get the hash value and compared it with the given range of dates. Not possible unless you make the function async and return a promise that resolves to the value you want the caller to receive. getResult(). If the widget should only be rendered once the data is available, you should not render it until that data has been loaded. You could create a Cloud Function which is triggered by an onWrite event to your cities collection. Modified 6 years, 8 months ago. Share. Post_collection = this. Hot Network Questions using v9, you can also get the ID even before creating the document. A bit more meaningful be to print the document id: Two years late but I just began reading the Firestore documentation recently cover to cover for fun and found withConverter which I saw wasn't posted in any of the above answers. all([getDoc]). I have the collection users and all of them has attributes like auth, email, nickname. Firestore get field value with document ref. Compared to executing a full query and calculating the aggregation in your app, I need the help to query long collection with date range. See the below example document. However, I would then like to write the download URL to firestore. DefaultInstance. Cloud Firestore GetSnapshotAsync to return a value. However, I get a full DocumentReference object with lots of info rather than just the document reference path/string I want. export interface Feed { firstName? : string; signup_id? : string; title? : string; } I'm trying to get data from my firestore database into my react native project. How get the id of an document from vuejs and firestore? 0. data(). Unity and C#. At least for now. But as @Doug Stevenson said: You can't query for something that doesn't exist in Firestore. "How to get that token_id?"), I would like to draw your attention on the fact that, in your code, the return Promise. Get a new docRef and read its random id; Use the id as you want; For example, insert the id in the document data; Then create the document In your first code snippet you are printing element, which are instances of the QueryDocumentSnapshot class. (see co Having answered your question (i. I think that you want to get the entire collection, and then map over all of the documents. Since you're not accessing specific data of the document snapshot, you get its default toString implementation, which apparently just shows the class name. The second print ##2 returns null because it called before the getWaypointById method finishes. I have set up a distributed counter of likes and want to count the total likes in the distributed counter. – Gil Gilbert. I have a button on a menu and i'm showing only if user is admin (usertype=1) on onPrepareOptionsMenu. A DocumentSnapshot contains data read from a document in your Cloud Firestore database. update({ nextOrderCode: firebase. That's the problem with being My firestore document contains names and other data too I just want to show names on the ListView but ListView takes itemCount which takes the length of the document but my document contains other values like doc1(name), doc2(name), doc3(name), doc4(other value), doc5(other value), something like that so the length of the document becomes 5 where I have a field of type map that contains Maps of data in firestore. snapshots(). As per official documentation regarding arrays: Although Cloud Firestore can store arrays, it does not support querying array members or updating single array elements. But if you want to get all documents where the field aave exists/has any value, you can make use of the fact that in the sort order of values they always start with null. 563 2 2 gold badges 9 9 silver badges I need help with retrieving the values stored in the 'friends' array. Modified 4 years, 5 months ago. name to get the value for the key 'name'. firestore As others have explained, you can't return that value, since it's loaded from Firestore asynchronously. When I check on the Firestore database, a user is created with an id, but the profile picture and username are null. toObject(Vehicle. Submission document has uid field. Data is loaded from Firestore (and most cloud APIs) asynchronously, and your main code continues while this is going on. This means that you can't use asynchronous information (such as data that you still need to load from Firestore) in initState. ts getDomiciliarios() { this. – I'm trying to get values from documents in collection using Firestore. Also use get() instead if you want to fetch data only once. These queries can also be used with either get() You therefore need to wait that the promise returned by the get() resolves and use the then() method, as Alex mentioned, to receive the query results and send the response. This how I read the docume Queries select specific values, or ranges of values, of a known field. The other question if about finding the ID of each document, which you can do with doc. pull data from FireStore. see the following from the docs: "Custom objects Using Java Map objects to represent your documents is often not very convenient, so Cloud Firestore also supports writing your own Java objects with custom classes. A value of type 'Future' While you may know for a fact there's only one document with the given uberId value, there is no way for the API to know that. js. DocumentSnapshot) => { console. I want to be able to update/delete worktime document when it's not signed. Remember, holding a null get values from firestore query. retrieving data from firestore collection. I wanna query startTime field using date range. map(s=>{ const data = 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 To query documents with the field exists. I want to store these values in my variable called friendsList and I try to do this in getFriendsList I have a collection called 'categories' containing a single document with ID: 5gF5FqRPvdroRF8isOwd. My actual query looks like this I am linking my application with cloude firestore and I am using python for it and I need to retrive the value "Balance" field for checking if it is valid. Afterwards i want to iterate through my Observable and get one specific value. 55 . 3. When setting the variable i am able to console. You incur the write only once unless you update the doc, and you incur the read only when you search. name. instance. id inside the loop. Here's what I've When i upload data on Firestore i creat a field name "position" with random value from 1 to 1 milions. Modified 3 years, 7 months ago. I calculated a Date Hash (Integer value) from the given date and stored it inside users database. Viewed 99 times Part of Google Cloud Collective React + Firestore : Return a variable from a query. Improve this question. log the 'amount'. You can use child listener to listen every change under the root node. For example, I have a collection named countries in cloud firestore, and I want to fetch all the country names and ids as json , but this list is null when I return it and android studio is prompting me to make the array list final. So you have to update the rest of the documents to have an array field with null. The image below shows the structure of my Firestore. get_the_posts(){ this. answered Oct 7, 2020 at I'm querying a collection for a specific document and trying to get the document-ID from the result of my query that is from type FirebaseFirestore. Subscriptions to Observables are quite similar to calling a function. js Firebase . collection('<collection_id>') return ; }; 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 This depends on what you need to do with the data. For arbitrary byte sequences there is no value that's higher than all possible other valid bytes so it's easier to go the way I describe. map() where the return value of the map() function is a new array, containing one entry for each entry of the original array, and the value of that new array is the return value from map()'s callback parameter. getString("coEmail"), even if you were to fix the scoping problem. QuerySnapshot. Firestore get all fields from a single document pure JS. toString() and the associated document that you're trying to get. resolve(); }); ``` get (refOrQuery) → Cloud Firestore provides powerful query functionality for specifying which documents you want to retrieve from a collection. You should adapt this part of the code and include it in the promises chain. phoneNumber in your code is not actually doing anything. domiciliarios = this. When a user changes his username, I must verify that this username is unique. 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 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 If the array has multiple instances of the value you query on, the document is included in the results only once. firebase; cloud; ref; google-cloud-firestore ; Share. document. Daibaku asked how to get the return value of user & use it. but when I try to retrieve it I get outputs like this I'm having a problem on how I will get the data/value from the field which is an array. This way, you'll end up with a states collection which only has one of each state in it. For Example : Get users between 1 Jan 2020 to 1 May 2020 So what I did was the following. – Doug Stevenson Commented May 20, 2020 at 23:30 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'm tryng to get that specific "points" field value. FieldValue. I want to perform some action based on the current document value from the server, but also listen for According to the documentation from firebase you can get a document very simply by using get(). delete(documentRef); return Promise. Since it will work with any type of data with any value even for null. " Is there a way to retrieve the updated value of a document field updated using firestore. I need to retrieve the value before doing others things with it. Commented Jan 6, 2018 at 18:07. How to get a Firestore transaction to return a promise? Ask Question Asked 6 years, 10 months ago. want to write a function which returns the document's data (as the object returns from db or dict), not just prints to consol. sub = this. so far, I have tried: all with the 'aref' const aref = firebase . Commented Jan 31, 2019 at 19:08 | Show 3 more comments. var countersRef = db. However, if I just hardcode a return of true or false, it works. How get specific Field data by document id from firestore website. e. Following code given below what i did. Firestore: how can read data from outside void onComplete methods. Improve this your code would be a lot simpler if get() would immediately return the value from the database, but it can't do that because the data needs to be loaded @小红书 as far as I know, Firebase is billing for every document, not for every field we get, so I think it gets the whole document in the snapshot, but you just get the field if you don't want to store the whole document in your application. Firestore provides powerful query functionality for specifying which documents you want to retrieve from a collection or collection group. I created new collection named categories. There are two ways: 1) final int documents = await Firestore. getOrders(). Any logs within my if statement always return correctly, but doesn't seem to be updating my global variable for some reason. map(). Please help me to Get to market quickly and securely with products that can scale globally Go to Build Build Products; App Check App Hosting Authentication Cloud Functions Cloud Storage Data Connect Extensions Firebase ML Firestore Genkit Hosting Realtime Database Vertex AI in Firebase Generative AI Run Run; Run your app with confidence and deliver the best experience for The purpose of initState is to determine the state of the widget when it first renders. subscribe((documentSnapshot: firebase. Firestore document listener doesn't return current value from server. this. Posts = this. collection("polja") . What I'd like to do is return the value from the get() call to my service, in the service I will be performing checks and executing the business logic that I need. teamId and WorkDayLocationData. Any idea why? When you authenticate your users using email and password, it means that a new instance of type FirebaseUser is created. Is it possible to subscribe it? Because it returns me a Observable object:( Here`s my code. But, if 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 this is Skip to main content. These queries can also be used with either get() or How can i get the value of collection field then return it? It can be done for currentUser to get uid etc but i need to get another value of field. So for example: I have this function that gets all the posts and I want to get the id of the post any idea how to get the id of the post or How to include the id when I add the document to the collection. First: make your getWaypointById method as Future like this: Angular firestore get value of observable. So those documents will not be returned. You can't query for documents without the field. Ask Question Asked 4 years, 6 months ago. same as answered by Gil Firestore- How to get the id of a user that contains a specific value? Ask Question Asked 3 years, 7 months ago. teamId is the same) - the global read seems to work fine and also the users{users} seems to work. Improve this answer. Each ticket has a reference field which assigns the ticket to a particular category. Depending on your connection speed and the state, it may take from a few hundred milliseconds to a Firebase Firestore get() method fetches and returns the object asynchronously which means chronologically the following occurs:. class);; So instead of returning object v using return v; I have a order data that has user data and hotel data as references. Hot Network Questions Im trying to sum an integer field in my firestore document collection, although I keep gettings errors. I want to get the firstName and title. Viewed 48k times Part of Google Cloud Collective 51 . I would like to get all the keys in that document. personId) . I asked a question two days ago with a reply "Your method must return a Promise (or an Observable). Using the converter Returns a query that can perform vector distance (similarity) search with given parameters. This is my If you mean that you would like to get just some parts of Firestore documents then you cannot. I'm trying to get a value from my firestore with flutter. To do so i tried the following: interface Note{ imageUrl: string; title: 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 ran across a problem while create some backend things for an app I'm making. Observables are new way of handling async requests. It looks like because firestore store integers as "num". See the link for example in all supported languages. android; How to return value from firestore database? 0. The Firestore REST API returns the updated document on the same call. – If you don't use Reference data type, you need to update every document. hey guys i am trying to get a text from firestore but it is returning a null value. Since you are only getting the email address and the password from the user, the only field of the class that I see, unfortunately if you need the full QuerySnapshot then you're going to have to run through each doc snapshot and search for the name. Modified 3 years, 5 months ago. When i get data from Fire store i will set Order by field "Position" and update value for it, a lot of user load data and data always update and it's will be random value. In React you handle this by putting the data in the component's state, and using it from there. get not returning expected data. I am trying to retrieve this data using a cloud function in node. school$ = school. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists I'm trying to get the timestamp of a document that I created in firestore, but what I get is this: myService. Return array of data from firestore query . When i'm passing the object with function to oncreate. For example, you can use where() to query for all of the documents that meet a certain condition, then use get() to retrieve the results: By default, Cloud Firestore retrieves all documents that Cloud Firestore provides powerful query functionality for specifying which documents you want to retrieve from a collection or collection group. How do I just get the download URL string as my 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 That's totally normal, the get() method is an async method you have to wait before it returns the value. Please see image: In the image, I want to get the data/value of parking_code which is from the array field (parkings). I am trying to simply get a value from firestore and storing it in a var. – Peza I am using angular and firestore. For example, to get the value of the "duration" field, you can use the following code: The problem I'm having is that in validate() I want to return the correct valid value after the callback is finished because it currently returns the incorrect value before the callback has finished. addChildEventListener(new ChildEventListener() { @Override public void onChildAdded(DataSnapshot dataSnapshot, This is a classic issue with asynchronous web APIs. collection('domiciliarios'). You are trying to get a single document/object and the problem is that you cannot map to it directly. This is an example of how my Firestore collections looks like You're asking two different things. 6k 22 22 gold badges 109 109 silver badges 133 133 bronze badges. I want to store my firestore value as boolean but it is being stored as string. Stack Overflow. Share . subscribe(result => { this flutter How to Get Bool value from firestore and change the button state. There is no support for dynamic field names in a query in Firestore. I manage to receive the value, I can even save it in the var when I do that specifi The value does not store the result returned from the return text segement. I've been able to get the data of a whole collection but unsure of how I would get different field values individually. The get() returns a Promise<FirebaseFirestore. Rusben Wladiskoz Rusben Wladiskoz. did the same for firebase database so i know i am the doing something wrong, so please if you have a solution or you find a mistake i No, you won't, since document2 doesn't contain an array field that holds the value of null. But I failed. For example, you have 2 collections "categories" and "products" and you stored the category name "Fruits" in categories to every document of "Apple" and "Lemon" in products as shown below. My user model is: export interface Us Is it possible to query a firestore collection to get all document that starts with a (U+DBFF U+DFFF) that could exclude some strings. – I'm trying to assign the data collected from a firestore document to a variable with an Observable type initialised before the constructor. pipe(map(schoollist=>schoollist. For that, I want to use a Cloud function for more reliability. firestore() . but when I try to retrieve it I get outputs like this I have two fire store collection with following reference image . collection('posts'); return this. When console logging my 'downloadURL' variable, I get the following: PromiseObservable {_isScalar: false, promise: y, scheduler: undefined} The download is inside the promise observable. I am trying to return the 'amount' from the database. My Firestore usage even says I have read the database 27 times so far, but I can't seem to get the String value and use it in my TextView. An aggregation query processes the data from multiple index entries to return a single summary value. Use the CollectionReference::select() + CollectionReference::where() to select only what we want to read from the firestore. After entering the Admission_No, I want to retrieve all the data in the relevant document such as name, grade, phone. You cannot return something now, that hasn't been loaded yet. it's about isAllowedWorkDayLocationData (checks if user-document. length; This returns a value of int. Now I want to get this collection in my Flutter application s 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 It will only return a list of document references – Roi Amiel. Let's assume we have the same collection schema as firestore cities example, but with an id field in our doc I get document from Firestore, it's work: this. getInstance() . In which I explained four ways in which you can get data from Firestore. I have another collection called 'tickets'. I have found that on page refresh, it returns as undefined. slugs) . Observables not only able to return a value synchronously, but also asynchronously. Each user's document contains collection named user-info that includes the filed I a m trying to get the list of documents in collections, but m not getting any document, This is code what i m trying- ` schoolProductCollectionFetch(schoolName){ const school = this. snapshotChanges(). The title of your question is about determining the index of each document in the map() function, and you can find an answer here: Flutter - Get iteration index from List. You will need to loop over the results in that snapshot to get your document. I tried to write a program for it. collection('products'). Ask Question Asked 5 years, 4 months ago. – I want to get data from my Firebase Firestore database. Ask Question Asked 3 years, 8 months ago. getData(). Within the application, I am updating the user document using the following code: const handleProfileUpdate = async How to make it work okay? I need only one document from base with id. I'm using a firebase firestore database for this project. So to get all documents where the field aave exists/has any value, My application (React) uses the service of Firestore. Follow edited Oct 7, 2020 at 14:26. // Function executes {onCreate} of a new Firestore document in {collection_a} exports. You cannot return something now that hasn't been loaded yet. Method onComplete doesn't work. I want I'm new to python. 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 the return info. docs to further retrieved the returned filtered result. Set a getter into a firestore section of vuefire. target_sensor_doc. Unfortunately, this mechanism doesn't work with real-time updates. I store a value referencing a link to an image in a firestore document. Follow edited Mar 21, 2023 at 12:56. Modified 5 years, 10 months ago. If not, It would be great to get any suggestions on how to tackle this problem in other ways - thanks! I want to (1) retrieve a reference field value from a doc in collection_a and write it to a doc in collection_b. 0. So if you are willing to use Kotlin Coroutines, then things will be much simpler. gradle file and both my app and firestore are linked. I currently have firebase initialized on the front end of a react application. By using DocumentSnapshot, you can get the document including document fields and its values. But where Observables are different is in their ability to return multiple values called streams. But, if you update the category name "Fruits" in categories, you also need to update the category In other words, you can use ". By the time your return runs, the data hasn't loaded yet. It's just the nature of how Firestore wraps data in returned queries. Yes, you can get document by calling task. Similarly, you can use the dot notation to access other fields in the JSON data, such as "country" or "duration". DatabaseReference reference = FirebaseDatabase . details. With other words, you cannot simply return the places list as a result of a method because it will always be empty due the asynchronous behavior of the onComplete function. Modified 4 years, 1 month ago. return v; statement would have executed first then get() fetches the document details and assigns to v = documentSnapshot. In your case first the second After doing some tests I got to the conclussion we're gonna have to cast Longs to Integers, since that's what we get from fetching a "Number" from firestore. But if I do the check after all the code in that method, it returns 0 because the async task hasn't took func from google's firestore get documentation. collection(" How I can read the original JSON that was stored in Firestore document from my Google Workflow? Because I only find a way to get a JSON with metadata value types instead. Ho Select only works on the top-level fields. If you want to match an array field against a list of value in your code, you can use an array-contains-any clause. async function getValue() { doc = await admin. Thanks! Share. The goal here was to retrieve all of the data. Depending on your connection speed and the state, it may take from a Is there any way to get the last created document in Firebase Firestore collection? Yes, there is! The simplest way to achieve this is to add a date property to each object in your collection, then simply query it according to this new property descending and How can I return a collection of documents from firestore database. sptbb uqqw ftfdpb meezj uovwtoy hgql twkaeue bfrtw knvukc jmfxx