How to Update and Delete data to Realtime Database ?
Use update() function for update data to firebase realtime database and use remove() function to delete data to firebase realtime database. Follow the step to update and delete the data for web to realtime database to firebase.
- First setup firebase SDK and Initialize Realtime Database
Updata Data :
update(ref(database, 'PARENT_NODE'), {CHILD_NODE : VALUE}) :import { database } from '<YOUR_FIREBASE_CONFIG_FILE_PATH>';import { update, ref } from 'firebase/database';update(ref(database,'PARENT_NODE'),{CHILD_NODE: VALUE});* First argument : update ref takePARENT_NODEas reference and update itsCHILD_NODEwithVALUE.* Second argument : It always takes an object.
For example,
Available data in realtime database :
We want to update mobileNumber so
PARENT_NODEis 'users/userInfo' and as a objectCHILD_NODEis 'mobileNumber' with its updated value '+1 1111111111'.So code for that is,
import { database } from '<YOUR_FIREBASE_CONFIG_FILE_PATH>';import { update, ref } from 'firebase/database';update(ref(database, 'users/userInfo'), { mobileNumber: '+1 1111111111' });There is second way to write code for the same functionality,TakePARENT_NODEas 'users' and as a objectCHILD_NODEis 'userInfo/mobileNumber' with its value '+1 1111111111'.import { database } from '<YOUR_FIREBASE_CONFIG_FILE_PATH>';import { update, ref } from 'firebase/database';update(ref(database, 'users'), { 'userInfo/mobileNumber': '+1 1111111111' });
update() return Promise so you can run code on fulfilled and handle errors using '.then()' or 'async/await'. Delete Data :
remove(ref(database, 'REFERENCE_PATH')) :import { database } from '<YOUR_FIREBASE_CONFIG_FILE_PATH>';import { remove, ref } from 'firebase/database';remove(ref(database, 'REFERENCE_PATH'));
'.then( )' : Code for that,
update(ref(database, 'users'), { 'userInfo/mobileNumber': '+1 1111111111' })
.then(() => {
// Run code after successful update
})
.catch((error) => console.log(error));
REFERENCE_PATH is path location of 'node' whose data will remove.For example,
We want to delete 'mobileNumber' field so for that
REFERENCE_PATH is 'users/userInfo/mobileNumber'. So code for that is,import { database } from '<YOUR_FIREBASE_CONFIG_FILE_PATH>';
import { remove, ref } from 'firebase/database';
remove(ref(database, 'user/userInfo/mobileNumber'));
'.then( )' : Code for that is,
remove(ref(database, 'user/userInfo/mobileNumber'))
.then(() => {
// Run code after successful deletion
})
.catch((error) => console.log(error));
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