lenra-io/server

[Bug]: Listener call returns an error

Open

#573 opened on Jan 7, 2024

View on GitHub
 (0 comments) (0 reactions) (0 assignees)Elixir (0 forks)auto 404
buggood first issue

Repository metrics

Stars
 (6 stars)
PR merge metrics
 (PR metrics pending)

Description

What happened?

I was testing the template-bun on this commit : https://github.com/lenra-io/template-bun-js/commit/3e1067122107e3fdebb48e1aed3fa02b29a98048

It seems that when opening the application page, you can't click more than once on the increment button. An error occurs and if you wait a little (5 seconds), it will actually register the event properly. If you let time for the app page to initialise, this error does not occur.

https://github.com/lenra-io/lenra_cli/assets/36544012/d48c72cc-ce45-4611-8b7d-ee92f3a1572e

LOGS

Client

Error: Expected a value of type 'String', but got one of type 'Null'
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 294:3       throw_
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 127:3       castError
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 818:12  cast
dart-sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart 674:17                as
packages/client_common/api/response_models/api_error.dart 14:17                   fromJson
packages/lenra_ui_runner/io_components/lenra_route.dart 47:26

What browsers are you seeing the problem on?

No response

Version

No response

Relevant log output

No response

Contributor guide

Research direction
Focus on the error: 'Expected a value of type 'String', but got one of type 'Null'. This occurs in fromJson of api error.dart and in lenra route.dart line 47. The bug is likely due to the Listener call returning an error response that is null or missing a field. The timing issue suggests maybe the Listener hasn't been fully initialized when the first click happens. Investigate the listener registration and how the route handles responses. Look for race conditions.
Tech stack
dartflutterelixir
Domain
frontendbackend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
DartFlutterGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60