datamodel done without validators

wagfarm-api/logs/cropprotection/model.go

@@ -0,0 +1,36 @@
+package cropprotection
+
+import (
+	"wagfarm-api/assets/pesticide"
+	"wagfarm-api/database"
+	"wagfarm-api/logs/base"
+	"wagfarm-api/taxonomy/worker"
+
+	"github.com/shopspring/decimal"
+	"gorm.io/gorm"
+)
+
+type CropProtectionLog struct {
+	base.FieldWorkLog
+	PesticideID   uint                `gorm:"not null"`
+	Pesticide     pesticide.Pesticide `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;not null"`
+	Amount        float64             `gorm:"not null"` // in units of the pesticide
+	PerformedByID uint                `gorm:"not null"`
+	PerformedBy   worker.Worker       `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;not null"`
+}
+
+func (l *CropProtectionLog) AfterSave(db *gorm.DB) (err error) {
+	// Example: compute cost as Amount * UnitPrice
+	if l.Pesticide.ID == 0 {
+		if err := db.First(&l.Pesticide, l.PesticideID).Error; err != nil {
+			return err
+		}
+	}
+
+	unitPrice := l.Pesticide.Cost
+	totalCost := unitPrice.Mul(decimal.NewFromFloat(l.Amount))
+	l.UpdateCost(db, totalCost)
+	return
+}
+
+func RegisterModels() { database.RegisterModel(&CropProtectionLog{}) }