Refactor functions that created their own sessions when called from
within existing transactions, which caused "database table is locked"
errors in SQLite's shared-cache mode.
Changes:
- Add files.CreateWithSession() to reuse caller's session
- Refactor DeleteBackgroundFileIfExists() to accept session parameter
- Add variadic session parameter to notifications.Notify() and
Notifiable.ShouldNotify() interface
- Update all Notify callers (~17 sites) to pass their session through
- Use files.CreateWithSession in SaveBackgroundFile and NewAttachment
- Fix test code to commit sessions before assertions
Since NewSession() now auto-begins a transaction, explicit Begin()
calls are redundant (xorm's Begin() is a no-op when already in a
transaction). Removing them reduces confusion.
Special case: user_delete.go's loop previously called Begin/Commit
per user on a shared session. Restructured to create a new session
per user deletion so each gets its own transaction.
Add defer s.Close() to sessions that were never closed:
- auth.GetAuthFromClaims inline session
- models.deleteUsers cron function
- notifications.notify database insert
This fixes a bug where the ownership of a project was not transferred when the user was deleted, leading to errors when viewing the project, as the owner user could not be found.
Resolves https://kolaente.dev/vikunja/vikunja/issues/2827