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Flutter×FirebaseのCRUD処理まとめ

Last updated at Posted at 2021-06-17

M1 MacBook、Android Studio、Flutter 2.0
2021年1月末からプログラミング学習始めた初心者です。自分用メモ。

1、FlutterとFirebaseをリンク
https://firebase.google.com/docs/flutter/setup

2、最初のおまじない

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

3、以下、CRUD処理
・登録(Create)

var collection = FirebaseFirestore.instance.collection("sauna");
    collection.add({
   'title': title,
      'isDone': false,
      'createdTime': Timestamp.now()
    });

読取(Read)

StreamBuilder<QuerySnapshot>(
      stream: saunas.snapshots(),
      builder: (context, snapshot) {
        if (snapshot.hasData) {
          return ListView.builder(
            itemBuilder: (BuildContext context, int index){
              if(snapshot.data!.docs[index]['isDone']) return Container();
              return CheckboxListTile(
                controlAffinity: ListTileControlAffinity.leading,
                title: Text(snapshot.data!.docs[index]['title']),
                value: snapshot.data!.docs[index]['isDone'],

更新(Update)

onPressed: ()async{
       await snapshot.data!.docs[index].reference.update({
           'title': editTitleController.text,
           'updatedTime': Timestamp.now(),
            });
            Navigator.pop(context);
            },
            child: const Text('編集'),

削除(Delete)

onPressed: ()async{
       await snapshot.data!.docs[index].reference.delete();
            Navigator.pop(context);
            },
            child: Text('削除実行'),
            ),
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