Restriction: it should not be possible to add negative amount of book copies

feyclan / WT_backend

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Restriction: it should not be possible to add negative amount of book copies #54

Open LucDielhof opened 2 months ago

LucDielhof commented 2 months ago

adding issues: currently possible to add a negative ammount of issues. ( should be restricted at 0) should it also be possible to add a book with 0 issues currently?