switch update to upsert

internal/api/merch/repository.go

@@ -4,6 +4,7 @@ import (
 	"database/sql"
 	"errors"
 	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 	"time"
 )
 
@@ -117,22 +118,18 @@ func (r *Repo) updateMerch(payload UpdateMerchDTO, userUuid string) error {
 
 	switch payload.Origin {
 	case "surugaya":
-		var recordSurugaya Surugaya
-		err := r.db.Where("merch_uuid = ?", payload.MerchUuid).FirstOrCreate(&recordSurugaya, Surugaya{
+		if err := r.upsertOrigin(&Surugaya{
 			MerchUuid: payload.MerchUuid,
 			Link:      payload.Link,
-		}).Error
-		if err != nil {
+		}); err != nil {
 			return err
 		}
 
 	case "mandarake":
-		var recordMandarake Mandarake
-		err := r.db.Where("merch_uuid = ?", payload.MerchUuid).FirstOrCreate(&recordMandarake, Mandarake{
+		if err := r.upsertOrigin(&Mandarake{
 			MerchUuid: payload.MerchUuid,
 			Link:      payload.Link,
-		}).Error
-		if err != nil {
+		}); err != nil {
 			return err
 		}
 	}
@@ -220,3 +217,10 @@ func (r *Repo) getDistinctPrices(userUuid, merchUuid string, period time.Time) (
 	}
 	return prices, nil
 }
+
+func (r *Repo) upsertOrigin(model any) error {
+	return r.db.Clauses(clause.OnConflict{
+		Columns:   []clause.Column{{Name: "merch_uuid"}},
+		DoUpdates: clause.AssignmentColumns([]string{"link"}),
+	}).Create(model).Error
+}