[Sessions: create / edit / cancel] Cancel through status-only update
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评估
调研方向
Start with cancelSession in lib/sessions/session_repository.dart, and read the server guard at supabase/schemas/private/functions/sessions_guard_update.sql to see how cancellation timestamps are set. Read issue #29 first, since this issue builds on it. Done means the cancel call sends only a status update filtered by id and hostId, an already-cancelled session is treated as success on retry, and missing or unauthorized sessions raise a readable error. Verify with test/sessions/session_repository_dp_s09_test.dart, flutter test on that file, and flutter analyze.
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描述
What to build
Cancel a hosted meeting by changing its status, not deleting it. The server supplies the cancellation timestamp, and retrying an already-completed cancellation should be handled safely.
Files
lib/sessions/session_repository.dart(extend the prerequisite’s file)- Starting example: supabase/schemas/private/functions/sessions_guard_update.sql
Code to add or extend:Future<void> cancelSession(client,userId,sessionId).
Steps
- Update {"status":"cancelled"} only, filtered by id and hostId.
- Do not delete row or set cancelledAt; server guard supplies timestamp. For session_cancelled, re-read own row and treat an already-cancelled state as satisfied.
- Unknown/missing/permission errors fail with a readable cancellation error.
Example
Request body contains only status; already cancelled row does not become a second update/delete.
Check it works
In test/sessions/session_repository_dp_s09_test.dart, check the example above and the failure or limit described in the steps. Run flutter test test/sessions/session_repository_dp_s09_test.dart and flutter analyze.
Before starting
- #29 — Read caller hosted sessions
References
Assign yourself before starting, or comment to claim the issue. Project setup.
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- PLpgSQL
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