CODEWITHSUNDEEP
mobilefluttergoogle-cloud-firestore
Vinicius Yukita
Vinicius Yukita

Reputation: 23

How to add a new field to a firestore collection when offline with flutter?

I'm using flutter and Google firestore and I need to update a collection (add a new field), when offline, I'm testing using airplane mode. When I click in the button the app crashes and the data is not sent to the database. It works fine online.

I think this happen because the async/await, however if I don't use them, the app doesn't even save when online.

Widget where the is the function that calls the update function (I'm using FutureBuilder):

var formataData = new DateFormat('y/MM/dd');
var data = formataData.format(new DateTime.now());
final _funcao = funcoesBanco();

 child: RaisedButton(
   shape: RoundedRectangleBorder(
   borderRadius: BorderRadius.circular(25)),
   child: Text(
    "Registrar", style: TextStyle(fontSize: 17),),
    onPressed: () {
     _funcao.atualizaCampos(data, 'saida1', snapshot.data[index]);
    },
   ),

The update function:

atualizaCampos(String dataHoraAtual, String campo, DocumentSnapshot document){
    Firestore.instance.runTransaction((transaction) async{
      DocumentSnapshot freshSnap = await transaction.get(document.reference);
      await transaction.update(freshSnap.reference , {
        campo: dataHoraAtual,
      });
    });
  }

The expected result would be the data added to the firestore, even when offline.

The errors I get in the console:

V/NativeCrypto(19561): Read error: ssl=0x740b0778c8: I/O error during system call, Software caused connection abort
V/NativeCrypto(19561): Write error: ssl=0x740b0778c8: I/O error during system call, Broken pipe
V/NativeCrypto(19561): Write error: ssl=0x740b0778c8: I/O error during system call, Broken pipe
I/OkHttpClientTransport(19561): Failed closing connection

E/flutter (19561): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: PlatformException(Error performing transaction, java.lang.Exception: Do transaction failed., null)

Upvotes: 1

Views: 478

Answers (1)

Vinicius Yukita
Vinicius Yukita

Reputation: 23

I've just figured it out, the Widget is now like this (changed the onPressed):

var formataData = new DateFormat('y/MM/dd');
var data = formataData.format(new DateTime.now());
final _funcao = funcoesBanco();
final docID = snapshot.data[index].reference.documentID;

 child: RaisedButton(
   shape: RoundedRectangleBorder(
   borderRadius: BorderRadius.circular(25)),
   child: Text(
    "Registrar", style: TextStyle(fontSize: 17),),
    _funcao.atualizaCampos(docID,{
     'saida2': data
    });
   ),

And the function is like this:

atualizaCampos(document, novoCampo){
 _firestore.collection('horarios').document(document).updateData(novoCampo);
}

Upvotes: 1

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