AmountCast::class, 'amount_reduced' => AmountCast::class, 'amount_solidarity' => AmountCast::class, ]; public function tenant() : BelongsTo { return $this->belongsTo(Tenant::class, 'tenant', 'slug'); } public function type() : BelongsTo { return $this->belongsTo(ParticipationType::class, 'type', 'slug'); } }