[cloud_firestore/unknown] error-Invalid argument (dartObject): Could not convert: Instance of 'Timestamp'

[Puspharaj]

Flutter Web application here - 2.0.1

I'm in the middle of production release, please help asap. Thanks!!

Version: 1.54.3 (user setup)
Commit: 2b9aebd5354a3629c3aba0a5f5df49f43d6689f8
Date: 2021-03-15T10:55:45.459Z
Electron: 11.3.0
Chrome: 87.0.4280.141
Node.js: 12.18.3
V8: 8.7.220.31-electron.0
OS: Windows_NT x64 10.0.19042

equatable: ^2.0.0
firebase_auth: ^1.0.1
google_sign_in: ^4.5.1
firebase_core: ^1.0.2
cloud_firestore: ^1.0.3
firebase_core_web: ^1.0.2
cloud_firestore_web: ^1.0.3
firebase_storage: ^8.0.1
firebase_analytics: ^7.0.1

#2153

I believe this is seems to be resolved but pops up again, cloud_firestore_web: ^1.0.3 to eliminate the error.

I have bunch of nested objects in main object, While trying to save into firebase firestore , it's throws the error.
This is the object I'm going to save it in firestore. Item list having timestamp that causing this error again.

         `[Item(78bfc5b6-8208-4ffa-ae19-71226afa9717, Timestamp(seconds=1615961406, 
          nanoseconds=388000000), Timestamp(seconds=1615961406, nanoseconds=388000000)), 
          Item(78bfc5b6-8208-4ffa-ae19-71226afa9717, Timestamp(seconds=1615961406, 
          nanoseconds=388000000), Timestamp(seconds=1615961406, nanoseconds=388000000)), 
          Item(78bfc5b6-8208-4ffa-ae19-71226afa9717, Timestamp(seconds=1615961406, 
          nanoseconds=388000000), Timestamp(seconds=1615961406, nanoseconds=388000000))]
          `

The error occurs at the list of timestamp i gues. Any help appreciated. Thanks!

[markusaksli-nc]

Hi @Puspharaj
Could you please provide your flutter doctor -v and flutter pub deps -- --style=compact?
Could you provide a minimal complete reproducible code sample?
Thank you

[Puspharaj]

flutter doctor -v
[√] Flutter (Channel stable, 2.0.1, on Microsoft Windows [Version 10.0.19042.868], locale en-IN)
• Flutter version 2.0.1 at D:\Flutter_SDKs\flutter_windows_1.26.0-17.5.pre-beta\flutter
• Framework revision c5a4b4029c (4 weeks ago), 2021-03-04 09:47:48 -0800
• Engine revision 40441def69
• Dart version 2.12.0

[!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at C:\Users\Pusp\AppData\Local\Android\sdk
• Platform android-30, build-tools 29.0.2
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
Run flutter doctor --android-licenses to accept the SDK licenses.
See https://flutter.dev/docs/get-started/install/windows#android-setup for more details.

[√] Chrome - develop for the web
• Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe

[√] Android Studio (version 3.5)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin version 43.0.1
• Dart plugin version 191.8593
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)

[√] VS Code (version 1.54.3)
• VS Code at C:\Users\Pusp\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 3.18.0

[√] Connected device (2 available)
• Chrome (web) • chrome • web-javascript • Google Chrome 89.0.4389.114
• Edge (web) • edge • web-javascript • Microsoft Edge 89.0.774.63

---

flutter pub deps -- --style=compact
Dart SDK 2.12.0
Flutter SDK 2.0.1
castella_bakes 1.0.0+1

dependencies:

• animations 2.0.0 [flutter]
• bloc 7.0.0 [meta]
• cloud_firestore 1.0.3 [cloud_firestore_platform_interface cloud_firestore_web firebase_core firebase_core_platform_interface flutter meta]
• collection 1.15.0
• confetti 0.6.0-nullsafety [flutter random_color vector_math]
• equatable 2.0.0 [collection meta]
• file_picker 3.0.0 [flutter flutter_web_plugins flutter_plugin_android_lifecycle plugin_platform_interface]
• firebase_analytics 8.0.0-dev.0 [firebase_analytics_platform_interface firebase_analytics_web firebase_core flutter meta]
• firebase_auth 1.0.1 [firebase_auth_platform_interface firebase_auth_web firebase_core firebase_core_platform_interface flutter meta]
• firebase_core 1.0.2 [firebase_core_platform_interface firebase_core_web flutter meta]
• firebase_storage 8.0.1 [firebase_core firebase_core_platform_interface firebase_storage_platform_interface firebase_storage_web flutter]
• flutter 0.0.0 [characters collection meta typed_data vector_math sky_engine]
• flutter_bloc 7.0.0 [flutter bloc provider]
• flutter_staggered_grid_view 0.4.0-nullsafety.3 [flutter]
• formz 0.4.0-nullsafety.0
• geolocator 7.0.1 [flutter geolocator_platform_interface geolocator_web]
• get_it 6.0.0 [async collection]
• google_fonts 2.0.0 [flutter http path_provider crypto]
• google_maps_flutter 2.0.2 [flutter flutter_plugin_android_lifecycle google_maps_flutter_platform_interface]
• google_maps_flutter_web 0.3.0 [flutter flutter_web_plugins meta google_maps_flutter_platform_interface google_maps stream_transform sanitize_html]
• google_sign_in 5.0.1 [google_sign_in_platform_interface google_sign_in_web flutter meta]
• html 0.15.0 [csslib source_span]
• http 0.13.1 [http_parser meta path pedantic]
• intl 0.17.0 [clock path]
• json_annotation 4.0.1
• shared_preferences 2.0.5 [meta flutter shared_preferences_platform_interface shared_preferences_linux shared_preferences_macos shared_preferences_web shared_preferences_windows]
• timeago 3.0.2
• url_strategy 0.2.0 [flutter_web_plugins]
• uuid 3.0.3 [crypto]

dev dependencies:

• build_runner 1.12.2 [args async build build_config build_daemon build_resolvers build_runner_core code_builder collection crypto dart_style glob graphs http_multi_server io js logging meta mime path pedantic pool pub_semver pubspec_parse shelf shelf_web_socket stack_trace stream_transform timing watcher web_socket_channel yaml]
• flutter_test 0.0.0 [flutter test_api path fake_async clock stack_trace vector_math async boolean_selector characters charcode
  collection matcher meta source_span stream_channel string_scanner term_glyph typed_data]
• json_serializable 4.1.0 [analyzer build build_config collection json_annotation meta path source_gen]

transitive dependencies:

• _fe_analyzer_shared 19.0.0 [meta]

• analyzer 1.3.0 [_fe_analyzer_shared cli_util collection convert crypto glob meta package_config path pub_semver source_span watcher yaml pedantic]

• args 2.0.0

• async 2.5.0 [collection]

• boolean_selector 2.1.0 [source_span string_scanner]

• build 2.0.0 [analyzer async convert crypto glob logging meta path]

• build_config 0.4.7 [checked_yaml json_annotation meta path pubspec_parse yaml]

• build_daemon 2.1.10 [built_collection built_value http_multi_server logging pedantic path pool shelf shelf_web_socket stream_transform watcher web_socket_channel]

• build_resolvers 2.0.0 [analyzer build crypto graphs logging path package_config pool pub_semver stream_transform]

• build_runner_core 6.1.12 [async build build_config build_resolvers collection convert crypto glob graphs logging meta path package_config pedantic pool timing watcher yaml]

• built_collection 5.0.0

• built_value 8.0.2 [built_collection collection fixnum]

• characters 1.1.0

• charcode 1.2.0

• checked_yaml 2.0.1 [json_annotation source_span yaml]

• cli_util 0.3.0 [meta path]

• clock 1.1.0

• cloud_firestore_platform_interface 4.0.0 [collection firebase_core flutter meta plugin_platform_interface]

• cloud_firestore_web 1.0.3 [cloud_firestore_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins js]

• code_builder 3.7.0 [built_collection built_value collection matcher meta]

• convert 3.0.0 [typed_data]

• crypto 3.0.0 [collection typed_data]

• csslib 0.17.0 [source_span]

• dart_style 2.0.0 [analyzer args path pub_semver source_span]

• fake_async 1.2.0 [clock collection]

• ffi 1.0.0

• file 6.1.0 [meta path]

• firebase 9.0.1 [http http_parser js]

• firebase_analytics_platform_interface 2.0.0-dev.0 [flutter meta]

• firebase_analytics_web 0.3.0-dev.0 [firebase firebase_analytics_platform_interface flutter flutter_web_plugins meta]

• firebase_auth_platform_interface 4.0.0 [firebase_core flutter meta plugin_platform_interface]

• firebase_auth_web 1.0.3 [firebase_auth_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins http_parser intl js meta]

• firebase_core_platform_interface 4.0.0 [flutter meta plugin_platform_interface]

• firebase_core_web 1.0.2 [firebase_core_platform_interface flutter flutter_web_plugins js meta]

• firebase_storage_platform_interface 2.0.0 [collection firebase_core flutter meta plugin_platform_interface]

• firebase_storage_web 1.0.2 [async firebase_core firebase_core_web firebase_storage_platform_interface flutter flutter_web_plugins http js meta]

• fixnum 1.0.0

• flutter_plugin_android_lifecycle 2.0.1 [flutter]

• flutter_web_plugins 0.0.0 [flutter js characters collection meta typed_data vector_math]

• geolocator_platform_interface 2.0.0 [flutter plugin_platform_interface vector_math meta]

• geolocator_web 2.0.2 [flutter flutter_web_plugins geolocator_platform_interface]

• glob 2.0.0 [async collection file path pedantic string_scanner]

• google_maps 5.1.0 [js_wrapping meta]

• google_maps_flutter_platform_interface 2.0.3 [flutter meta plugin_platform_interface stream_transform collection]

• google_sign_in_platform_interface 2.0.1 [flutter meta quiver]

• google_sign_in_web 0.10.0 [google_sign_in_platform_interface flutter flutter_web_plugins meta js]

• graphs 1.0.0

• http_multi_server 2.2.0 [async]

• http_parser 4.0.0 [charcode collection source_span string_scanner typed_data]

• io 0.3.5 [meta path string_scanner]

• js 0.6.3

• js_wrapping 0.7.0 [js]

• logging 1.0.0

• matcher 0.12.10 [stack_trace]

• meta 1.3.0

• mime 1.0.0

• nested 1.0.0 [flutter]

• package_config 2.0.0 [path]

• path 1.8.0

• path_provider 2.0.1 [flutter path_provider_platform_interface path_provider_macos path_provider_linux path_provider_windows]

• path_provider_linux 2.0.0 [path xdg_directories path_provider_platform_interface flutter]

• path_provider_macos 2.0.0 [flutter]

• path_provider_platform_interface 2.0.0 [flutter meta platform plugin_platform_interface]

• path_provider_windows 2.0.0 [path_provider_platform_interface meta path flutter ffi win32]

• pedantic 1.11.0

• platform 3.0.0

• plugin_platform_interface 2.0.0 [meta]

• pool 1.5.0 [async stack_trace]

• process 4.1.0 [file path platform]

• provider 5.0.0 [collection flutter nested]

• pub_semver 2.0.0 [collection]

• pubspec_parse 1.0.0 [checked_yaml collection json_annotation pub_semver yaml]

• quiver 3.0.0 [matcher]

• random_color 1.0.6-nullsafety [flutter]

• sanitize_html 2.0.0 [html meta]

• shared_preferences_linux 2.0.0 [flutter file meta path path_provider_linux shared_preferences_platform_interface]

• shared_preferences_macos 2.0.0 [shared_preferences_platform_interface flutter]

• shared_preferences_platform_interface 2.0.0 [flutter]

• shared_preferences_web 2.0.0 [shared_preferences_platform_interface flutter flutter_web_plugins meta]

• shared_preferences_windows 2.0.0 [shared_preferences_platform_interface flutter file meta path path_provider_platform_interface path_provider_windows]

• shelf 1.1.0 [async collection http_parser path stack_trace stream_channel]

• shelf_web_socket 0.2.4+1 [shelf stream_channel web_socket_channel]

• sky_engine 0.0.99

• source_gen 1.0.0 [analyzer async build dart_style glob meta path pedantic source_span]

• source_span 1.8.0 [charcode collection path term_glyph]

• stack_trace 1.10.0 [path]

• stream_channel 2.1.0 [async]

• stream_transform 2.0.0

• string_scanner 1.1.0 [charcode source_span]

• term_glyph 1.2.0

• test_api 0.2.19 [async boolean_selector collection meta path source_span stack_trace stream_channel string_scanner term_glyph
  matcher]

• timing 0.1.1+3 [json_annotation]

• typed_data 1.3.0 [collection]

• vector_math 2.1.0

• watcher 1.0.0 [async path pedantic]

• web_socket_channel 1.2.0 [async crypto stream_channel]

• win32 2.0.4 [ffi]

• xdg_directories 0.2.0 [meta path process]

• yaml 3.1.0 [collection source_span string_scanner]

               ` 
                class Track extends Equatable {
                  const Track({this.id, this.createdDate, this.updatedDate, this.track});
                
                  final String? id;
                  final List<String>? track;
                  final Timestamp? createdDate;
                  final Timestamp? updatedDate;
                
                  static const empty = Track(id: '', track: null);
                
                  @override
                  List<Object?> get props => [id, track, updatedDate, createdDate];
                
                  TrackEntity toEntity() {
                    return TrackEntity(
                      this.id,
                      this.track,
                      this.createdDate,
                      this.updatedDate,
                    );
                  }
                
                  static Track fromEntity(TrackEntity entity) {
                    return Track(
                      id: entity.id,
                      track: entity.track,
                      createdDate: entity.createdDate,
                      updatedDate: entity.updatedDate,
                    );
                  }
                }`
  

This kind of example model to List then, when trying to save it in firestore. It's says the above error. Right now I can't give you reproducible code. Please try yourself, If you can't then will add some code.

[darshankawar]

@Puspharaj
The above code seems to be from your production app. We would like to have a minimal reproducible code that we can directly copy paste and run to verify the issue you are facing.

[Puspharaj]

Ok, please wait for day or two I can post the exact code with error.