func scopePrimaryKeys(scope *gorm.Scope, tableName string) string {
var primaryKeys []string
for _, field := range scope.PrimaryFields() {
key := fmt.Sprintf("%v.%v", scope.Quote(tableName), scope.Quote(field.DBName))
primaryKeys = append(primaryKeys, key)
}
if len(primaryKeys) > 1 {
return fmt.Sprintf("(%v)", strings.Join(primaryKeys, ","))
}
return strings.Join(primaryKeys, "")
}