Bernard Siebens ab1d34cd0a Fix a 500 when two roster entries clash on jersey number ...

team/season aren't TeamMembershipForm fields (the view sets them from
the URL, not user input), so Django's own validate_unique() silently
excludes both of them -- and with them, the whole
unique_jersey_number_per_team_per_season constraint. A clashing jersey
number reached the database unrejected and came back as a raw
IntegrityError. form.clean() now checks it by hand, same as
PositionForm already does for its own check constraint; the four
roster/staff save paths also get a try/except IntegrityError backstop
so any future gap degrades to an error banner instead of a 500.

2026-08-03 22:42:19 +02:00

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