35 lines
893 B
Go
35 lines
893 B
Go
package fertilizing
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import (
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"wagfarm-api/assets/fertilizer"
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"wagfarm-api/database"
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"wagfarm-api/logs/generic"
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"github.com/shopspring/decimal"
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"gorm.io/gorm"
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)
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type FertilizingLog struct {
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generic.BaseExtendedLog
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FertilizerID uint `gorm:"not null"`
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Fertilizer fertilizer.Fertilizer `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;not null"`
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Amount float64 `gorm:"not null"` // in units of the fertilizer
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}
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func (l *FertilizingLog) AfterSave(db *gorm.DB) (err error) {
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// Example: compute cost as Amount * UnitPrice
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if l.FertilizerID == 0 {
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if err := db.First(&l.Fertilizer, l.FertilizerID).Error; err != nil {
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return err
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}
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}
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unitPrice := l.Fertilizer.Cost
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totalCost := unitPrice.Mul(decimal.NewFromFloat(l.Amount))
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l.UpdateCost(db, totalCost)
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return
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}
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func RegisterModels() { database.RegisterModel(&FertilizingLog{}) }
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