Most voted "firebase" questions
Firebase is a platform for real-time storage-based application development and data synchronization using client-side code only.
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answer24
viewsHow to reference userid and issue a notification in firebase
I’m having the following structure of the real time database: And I am trying to create a trigger so that whenever a message is added in user003 I send a notification through FCM my function is not…
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answer100
viewsWrite user to firebase database
Good afternoon! I am facing a problem to record my user in my firebase database Altime. The scenario is as follows : I have my user creation code using the createUserWithEmailAndPassword method,…
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answer75
viewsFirebase Two foreach duplicating data
Friends, I started developing using Firebase not long ago. I’m "stuck" in a part of development where I’m using a foreach inside another foreach that’s oddly duplicating the results. When I see the…
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answer129
viewsHow to query by passing an array per parameter in the firestore?
I have a list of documents in the firestore, called shopping. Within each purchase of these, I have a FIELD, called condicaoPagamento, this keeps the condition of payment of the purchase. What I…
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answer162
viewsHow to log in with firebase and consume data from a local Rest api made with Node?
I have a React-Native application that consumes the data of an api made with Node and Mongo. And a simple application, is a CRUD of a "user" entity. However I have route protection using JWT in the…
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answer415
viewsHow I Upload Multiple Images Automatically to Firebase Storage - Android Studio
I am developing an app, this app the user can already choose multiple images, but I am not able to upload the images chosen automatically to Firebase Storage. The user can already authenticate.…
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answers127
viewsReturning data from Firebase to a Listview
I’m making an app for a subject in college that consists of creating events, but I’m having trouble returning these events in a Listview. I saw some similar questions, copied many results but…
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answer424
viewsConvert Varchar in Int or Int in Varchar (SQL Procedure)
in Procedure there are two fields (Cod_manufacturer(VARCHAR) and Codigo_manufacturer(INT)), a Varchar and an Int, when I do a LEFT JOIN to cross the tables, it gives me a conversion error, I tried…
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answers31
viewsAndroid Studio How to reference Activity within a Static method
I needed to create a static method in the main Activity, because Firebase is not accepting Framents within the CreateUserWithEmailAndPassword. I would like to know how I refer to the main Activity…
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answer2178
viewsHow to resolve "the getter data was called on null"?
Personal talk! I’m trying to create a function changeLikes where my firebase document (snapshot) has its likes incremented by Firebase by clicking on ontap through the FieldValue. However, I am…
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answer44
viewscreate a new Child with the same name instead of overwriting-firebase
I need help on firebase i have a code that creates a "Child" (I think that’s what it’s called) called "Records" inside the node(folder/table) called "users" that takes a value passed by parameter,…
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answer54
viewsFirebase stopping the iteration of foreach
Goal: I’m trying to make an array of objects containing 3 information: id, title and imageUri. But when taking the value of imageUri firebase(a download URL), the foreach hangs. Error:[Unhandled…
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answers39
viewsExporting data to Firebase
I’m trying to export a Python database to Firebase. My database is a JSON in the following format: '{ "0":{ "country":"Italy", "description":"Aromas include tropical fruit, broom, brimstone and…
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answer67
viewsI cannot display the Key element in the table
The previous problem was solved, but now I need to list also the key of my objects, because after I changed the method in my file . ts from snapshotChanges() for valueChanges(), I can no longer…
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answer548
viewsFirebase data checkbox in Flutter
I created a method that returns data from Firebase and creates a checklist containing the name. The problem is, when I select a checkbox, it selects all of them. What I did was extract Firebase…
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answer39
viewsName check in c# and firebase
I have not been able to find any results for my question and I will try here. So, I have a firebase database in a c# application and I was wondering if it was possible to check if the name entered…
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answer191
viewsArduino + SIM800L Connect to Firebase
Galley, I’m putting together a project and I need to connect my companion to firebase. For this I am using a SIM800L, however my code return the error below in the compiler, someone has already gone…
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answer33
viewsHow to get a single database value through the Angularfirestore and show your data via Observable?
That would be the template <div> <form [formGroup]="animalForm" fxLayout="row"> <mat-form-field> <input matInput placeholder="Microchip" formControlName="IdChip" #IdChip>…
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answers34
viewsRecover firebase data - order items
Good afternoon I am trying to list all the items of a request in a Recycler view, but the query only returns a value as below : public void recuperarItemPedido(String idPedido1) { databaseReference…
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answer70
viewsCreate a node inside another in Firebase with Android Studio
I would like to create a node called "Posts" within each user, but I can only create outside the user. It could help me to create the node within the user? Here is an example of how I wanted the…
android-studio firebase android-fragment firebase-databaseasked 4 years, 11 months ago Joao Paulo 11 -
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answer42
viewsFirebase Data Filter(Kotlin)
Speak for yourself Blz? I’m a beginner in Kotlin and Firebase! I’m trying to do a search on firebase in a collection that has user task data, I wanted to filter by ID, follow example: My search at…
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answer82
viewsGoogle plus authentication on Ionic
I’m trying to create a login with google plus in Ionic 4 on android platform, but is always coming back an error [10], which according to the google documentation, is a configuration error, but I…
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answer227
viewsFlatlist does not render data when launching the Application - Firebase integration
Good afternoon guys, I was studying the React Native Firebase library in order to learn how to work with a Firebase integration with React Native. However, I am facing some problems, the goal is to…
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answer73
viewsSort by date does not work - Firestore
Hello, I have a variable in the database that contains the date in "dd/MM/yyyy" format, when I try to use the orderby of a query with that date firebase uses only the days (dd) to sort my…
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answer46
viewsHow to create triggers in Firebase functions
I’m working on an application that needs to receive a notification whenever a client opens a request, but I’m not able to create a Rigger so that whenever a new document is opened Firebase will run…
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answer46
viewsFirestore Cloud emulator not running properly
I am testing a post request for login in the firebase database using the cloud firestore emulator with the command firebase serves in the terminal and the expected response in the 'Postman' would be…
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answer132
viewsHow to recover firebase keys? Javascript
Good evening, I have the following data structure: I need to store all these Ids that are children of visits in an array to later create a loop to search for the data that each of these Ids has, but…
javascript web-application firebase firebase-database idasked 4 years, 8 months ago LEANDRO DA SILVA 121 -
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answer317
viewsConfiguration of Flutter web and Firebase
I am trying to make a web application with Flutter Web and in my file index.html pasted the script indicated by google firebase, but when I run the application, it runs for hours "compaling…
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answers66
viewsPython - Create dynamic variable for firebase
I have a code that you receive from a spreadsheet CodProduto, Descrição and Quantidade and then inserts them into the database. Only it does this 1000x looping. How can I create variables with this…
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answer81
viewsField recording as Null in Firestore Flutter
I’m trying to record a document inside another document (nested Documents) in Flutter with Firestore. The model is a property that has some fields, and next to the fields a collection of comforts,…
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answer406
viewsUncaught Typeerror: Cannot read Property 'value' of null // JS Error
I’m making a website, and when I use Firebase it gives an error. I probably did something wrong with the Firebase script. This appears on the console: Uncaught TypeError: Cannot read property…
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answer267
viewsI am unable to delete in Firebase database with Flutter
I can’t seem to delete a data in Firebase personal. I created a CRUD I’m already connected with Firebase, the project is configured, and I was able to add some data. But I can’t delete it. It’s not…
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answers52
viewsProblems getting data from Firebase Realtime Database
I’m learning to use Firebase and this is my first project, but when I try to put the values of the database in a variable it returns Promise { <pending> }, the code in question is: const…
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answers26
viewsFirebase Child data is returning null. Kotlin Android Studio
Eai personal! I need to return the current user’s name and surname, registered in firebase. However, I have tried several implementations and none of them returns the result I want. In this last…
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answer44
viewsFirebase: updatePassword() does not work
I’m trying to perform a password reset system on my React Native project with Firebase but it doesn’t work at all. The state of the email is displayed as normal in Alert, but the password returns…
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answers28
viewsCdvplugin class Firebaseuthenticationplugin does not exist. Error: Cordova Plugin Mapping not found
When trying to authenticate the iOS device sending the phone number to receive an ID that will check the device with the code received via sms, with Firebase as shown below:…
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answers47
viewsFirestore call returning before the end of the run, on flutter
I have a function to search the data in the firestore. I call the function that is in a controller class helper.getTodosAgendures(); Works well. Below a snippet of my firestore search function.…
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answers18
viewsI noticed in Chrome devtools that my application (Angular) is making many requests. What could be wrong?
//SERVICE import { Injectable } from '@angular/core'; import { Angularfirestore, Angularfirestorecollection } from '@angular/fire/firestore'; import { Product } from '.. /model/product'; //import *…
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answers31
viewsI need a method that marks an item on a list as completed
I’m making a small app with to-do list that logs in firebase. Through the app I can add tasks to the list and delete with a long click, now I need it to mark "completed" in the app and reflect on…
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answers18
viewsProblem getting Facebook profile photo
Good night! Using the login with Facebook, the user is authenticated perfectly, I can recover the name and email, but when I try to recover the image from the profile of fb returns a default image,…
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answer53
viewsCannot scroll to Flat List
I’m building a recipe app with React Native, Expo and Firebase... I’m creating a Flatlist to render cards from an array of objects, but when the cards exceed the height of the screen I can’t see…
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answers87
viewsVisual Studio Connection 2019 c# with Firebase
I tried for hours and even days to look for application examples for VS 2019 connection extensions (in C#) with Firebase, but without any success. I feel that almost nobody uses it for lack of more…
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answers17
viewshow to read Firebase data via Dialogflow
Hello! I’m having difficulty reading the Firebase data via Dialogflow, I tried several ways, I saw some tutorials, but I did not identify the error, if anyone can help me, I thank. Firebase rules: {…
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answer177
viewsFlutter Exception Error in firebase_auth
Good afternoon, I’m using the firebase_auth plugin: 0.20.0+1 to authenticate user. When the user matches the login information no error is shown, however when the user is incorrect and an exception…
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answers12
viewsConnecting logged-in users only to their data in Firebase
Good afternoon. I would like to know how to make the data saved by a user be only seen by him once he has logged in. I am using Vue.js2 and Firebase. I followed this tutorial:…
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answers35
viewsFirebase Cloud Messaging - Failed to send notification via server
I have an application that sends messages from Server to Android through Firebase and is working. However, I am developing a new project with "andoirdx" and after the new changes in Firebase I am no…
php android android-studio firebase firebase-cloud-messagingasked 4 years, 2 months ago André Silva 21 -
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answers25
viewsHow to relate account to Realtime Database data in firebase
I am developing for web, and I can create the user, but I have to attach more data than email and password. In case I need to store the name, surname and date of birth. How I can create this user…
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answers11
viewsProblem with state React
I cannot use state helps once the page is rendered. The following error appears: TypeError: undefined is not an object (evaluating 'this.state.ajudas['0']['tipo']') My code: class AjudaScreen…
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answers14
viewsRealtime Database duplicates records
Hello, I’m ranking a game using the Firebase database but every time I "push" the data Firebase makes two records. Code sample: The Handlegameover function is invoked when the Gameover variable is…
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answers29
viewsHelp with Firebase and Android studio, collect data
Guys I have the following list in the database Opening each user of the list I have this information I need to take this information and play for a model class android studio, for this I’m using a…
android-studio firebase kotlin crud realtime-databaseasked 4 years, 1 month ago Felippe Pinheiro 11