flutter firestore collection snapshots queries tutorial

The solution for “flutter firestore collection snapshots queries tutorial” can be found here. The following code will assist you in solving the problem.

import ‘package:flutter/material.dart’;

import ‘package:cloud_firestore/cloud_firestore.dart’;

void main() => runApp(new MediaQuery(
data: new MediaQueryData(), child: new MaterialApp(home: new MyApp())));

class MyApp extends StatelessWidget {
final databaseReference = Firestore.instance;

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(‘FireStore Demo’),
),
body: Center(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
RaisedButton(
child: Text(‘Create Record’),
onPressed: () {
createRecord();
},
),
RaisedButton(
child: Text(‘View Record’),
onPressed: () {
getData();
},
),
RaisedButton(
child: Text(‘Update Record’),
onPressed: () {
updateData();
},
),
RaisedButton(
child: Text(‘Delete Record’),
onPressed: () {
deleteData();
},
),
],
)), //center
);
}

void createRecord() async {
await databaseReference.collection(“books”)
.document(“1”)
.setData({
‘title’: ‘Mastering Flutter’,
‘description’: ‘Programming Guide for Dart’
});

DocumentReference ref = await databaseReference.collection(“books”)
.add({
‘title’: ‘Flutter in Action’,
‘description’: ‘Complete Programming Guide to learn Flutter’
});
print(ref.documentID);
}

void getData() {
databaseReference
.collection(“books”)
.getDocuments()
.then((QuerySnapshot snapshot) {
snapshot.documents.forEach((f) => print(‘${f.data}}’));
});
}

void updateData() {
try {
databaseReference
.collection(‘books’)
.document(‘1’)
.updateData({‘description’: ‘Head First Flutter’});
} catch (e) {
print(e.toString());
}
}

void deleteData() {
try {
databaseReference
.collection(‘books’)
.document(‘1’)
.delete();
} catch (e) {
print(e.toString());
}
}
}

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