How to check if data was successfuly written to firebase in flutter

Question

I need to check if data was written successfuly to Firestore so if it was successful I need to show a popup showing data was written or if data wasn't written i need to show a popup showing task failed so should I use a future builder what is the way to do it

Answer 1

Every Firestore Operations are promises, so it has .then() and .catch() method to handle whether the task is successful or failure.
For example, you can do something like this.

 firestoreInstance.collection("Users").document('123456').updateData({
 
  "username" : 'white_devil'

 }).then((result) {
   
   print("Success!");

 }).catch((error){
 
   print("Error!")

});

Not only on updateData(), you can also use this case in setData(),add(),get(), getDocuments() and all operations which returns a promise.