Flutter - Updated all Firebase Dependencies - Bad state: cannot get a field on a DocumentSnapshotPlatform which does not exist

Question

I have a flutter project that I want to migrate to the newest dependencies (Firestore, FirebaseAuth, FirebaseStorage, etc.).

I migrated all the code and also updated my library to be able to launch the app. In a lot of my firebase collections I do not have defined fields and previously when I request from Firebase the field it just returns null. Now instead, it creates an error Bad state: cannot get a field on a DocumentSnapshotPlatform which does not exist and the application cannot function properly.

I would appreciate solutions that would allow me to update my dependencies but not change the code base as much.

Dependencies in Pubspec.yaml file:

  cupertino_icons: ^1.0.4
  cloud_firestore: ^3.1.0
  firebase_auth: ^3.2.0
  curved_navigation_bar: ^1.0.1
  grouped_list: ^4.1.0
  random_color: ^1.0.6-nullsafety
  intl: ^0.17.0
  firebase_storage: ^10.1.0
  image_picker: ^0.8.4+4
  flutter_staggered_grid_view: ^0.4.1
  carousel_slider: ^4.0.0
  csv: ^5.0.0
  path_provider: ^2.0.7
  excel: ^2.0.0-null-safety-3
  flutter_email_sender: ^5.0.2
  firebase_core: ^1.10.0
  firebase_messaging: ^11.1.0
  auto_size_text: ^3.0.0
  flutter_icons: ^1.1.0
  camera: ^0.9.4+4
  qr_code_scanner: ^0.6.1
  package_info: ^2.0.2
  url_launcher: ^6.0.13

Example Streambuilder code:

StreamBuilder(
  stream: stream,
  builder: (ctx, queryDetailSnapShot) {
    if (queryDetailSnapShot.connectionState ==
        ConnectionState.waiting) {
      return Center(child: CircularProgressIndicator());
    }

    var priceDetail = queryDetailSnapShot.data.docs;
    return ListView.builder(
        reverse: false,
        itemCount: priceDetail.length,
        itemBuilder: (ctx, index) {
          if (_selectedBottomIndex == 1) {
            return CostExpenseRequestContainer(
              widget.storenameUser,
              widget.storeCostAcess,
              widget.userName,
              widget.userEmail,
              widget.userId,
              widget.userLanguage,
              priceDetail[index]['Storename'],
              priceDetail[index]['Created_dt'],
              priceDetail[index]['Expense_type_en'],
              priceDetail[index]['Expense_type_th'],
              priceDetail[index]['Expense_amount_org'],
              priceDetail[index]['Expense_amount_approved'],
              priceDetail[index]['Visible_to'],
              priceDetail[index]['Expense_status'],
              priceDetail[index]['Photo_url'],
              priceDetail[index]['Service_dt'],
              priceDetail[index]['Partner_account_number'],
              priceDetail[index]['Partner_value_th'],
              priceDetail[index]['Partner_value_en'],
              priceDetail[index].id,
              key: ValueKey(priceDetail[index].id,),
            );
          } else
            return CostExpenseTrContainer(
              widget.storenameUser,
              widget.storeCostAcess,
              widget.userName,
              widget.userEmail,
              widget.userId,
              widget.userLanguage,
              priceDetail[index]['Storename'],
              priceDetail[index]['Created_dt'],
              priceDetail[index]['Service_dt'],
              priceDetail[index]['Expense_type_en'],
              priceDetail[index]['Expense_type_th'],
              priceDetail[index]['Expense_amount'],
              priceDetail[index]['Reversal_flg'],
              priceDetail[index]['Visible_to'],
              priceDetail[index].id,
              priceDetail[index]['Parent_record_id'],
              priceDetail[index]['Partner_account_number'],
              key: ValueKey(
                priceDetail[index].id,
              ),
            );
        });
  }),

Error Message:

Bad state: cannot get a field on a DocumentSnapshotPlatform which does not exist

user_6051666 · Answer

Earlier you had to call the field in document snapshot like this

docSnapshot['field']

But in the recent version, you have to call the data function to get the data as a map then access the required field. Example

docSnapshot.data()['field']

user_15116503 · Answer

Since the field that was creating an issue for me was Partner_account_number, I needed to check if the field exists before calling. This was the quickest fix I could find that need to apply throughout the application.

priceDetail[index].data().containsValue('Partner_account_number') ==true? 
priceDetail[index]['Partner_account_number']
:null

Flutter - Updated all Firebase Dependencies - Bad state: cannot get a field on a DocumentSnapshotPlatform which does not exist

2 Answers