belongsTo(OwnerBillReport::class); } public function owner(): BelongsTo { return $this->belongsTo(Owner::class); } public function unit(): BelongsTo { return $this->belongsTo(Unit::class); } public function getPriceAttribute(): string { return $this->unit_price . '/' . $this->unit->name; } public function model(): BelongsTo { return $this->belongsTo(OwnerPriceOperation::class, 'model_id', 'id'); } }