change log api to reflect data split into base and extension

wagfarm-api/logs/generic/model.go

@@ -0,0 +1,37 @@
+package generic
+
+import (
+	"wagfarm-api/assets/machine"
+	"wagfarm-api/generic"
+	"wagfarm-api/logs/base"
+
+	"github.com/shopspring/decimal"
+	"gorm.io/gorm"
+)
+
+type ExtendedLog interface {
+	generic.Model
+	GetBaseLog() base.BaseLog
+}
+
+type BaseExtendedLog struct {
+	ID        uint         `gorm:"primaryKey"`
+	BaseLogID uint         `gorm:"not null"`
+	BaseLog   base.BaseLog `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;not null"`
+}
+
+func (l BaseExtendedLog) GetID() uint              { return l.ID }
+func (l BaseExtendedLog) GetBaseLog() base.BaseLog { return l.BaseLog }
+func (l *BaseExtendedLog) UpdateCost(db *gorm.DB, newCost decimal.Decimal) (err error) {
+	err = db.Model(&base.BaseLog{}).
+		Where("id = ?", l.BaseLogID).
+		Update("cost", newCost).Error
+	return
+}
+
+type FieldWorkLog struct {
+	BaseExtendedLog
+	WorkedAreaPercentage float64         `gorm:"not null"`
+	MachineID            uint            `gorm:"not null"`
+	Machine              machine.Machine `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;not null"`
+}