diff --git a/model/cache.go b/model/cache.go
index 3ff9d7c5..c9e5b229 100644
--- a/model/cache.go
+++ b/model/cache.go
@@ -22,19 +22,14 @@ var (
 
 func CacheGetTokenByKey(key string) (*Token, error) {
 	var token Token
-	whereItem := "`key` = ?"
-	if common.UsingPostgreSQL {
-		// Make cmd compatible with PostgreSQL
-		whereItem = "\"key\" = ?"
-	}
 
 	if !common.RedisEnabled {
-		err := DB.Where(whereItem, key).First(&token).Error
+		err := DB.Where(&Token{Key: key}).First(&token).Error
 		return &token, err
 	}
 	tokenObjectString, err := common.RedisGet(fmt.Sprintf("token:%s", key))
 	if err != nil {
-		err := DB.Where(whereItem, key).First(&token).Error
+		err := DB.Where(&Token{Key: key}).First(&token).Error
 		if err != nil {
 			return nil, err
 		}
diff --git a/model/redemption.go b/model/redemption.go
index 67dfe290..9fa71971 100644
--- a/model/redemption.go
+++ b/model/redemption.go
@@ -52,14 +52,7 @@ func Redeem(key string, userId int) (quota int, err error) {
 	redemption := &Redemption{}
 
 	err = DB.Transaction(func(tx *gorm.DB) error {
-		whereItem := "`key` = ?"
-
-		if common.UsingPostgreSQL {
-			// Make cmd compatible with PostgreSQL
-			whereItem = "\"key\" = ?"
-		}
-
-		err := tx.Set("gorm:query_option", "FOR UPDATE").Where(whereItem, key).First(redemption).Error
+		err := tx.Set("gorm:query_option", "FOR UPDATE").Where(&Redemption{Key: key}).First(redemption).Error
 		if err != nil {
 			return errors.New("无效的兑换码")
 		}
diff --git a/model/user.go b/model/user.go
index 8f563776..044c1f6b 100644
--- a/model/user.go
+++ b/model/user.go
@@ -293,13 +293,7 @@ func GetUserEmail(id int) (email string, err error) {
 }
 
 func GetUserGroup(id int) (group string, err error) {
-	selectItem := "`group`"
-
-	if common.UsingPostgreSQL {
-		selectItem = "\"group\""
-	}
-
-	err = DB.Model(&User{}).Where("id = ?", id).Select(selectItem).Find(&group).Error
+	err = DB.Model(&User{}).Where(&User{Id: id}).Select("group").Find(&group).Error
 	return group, err
 }