add missing path property handling

storage/dao/database_error.go

@@ -12,19 +12,19 @@ const (
 	ErrTypeForeignKeyViolation
 )
 
-type DAOError struct {
+type Error struct {
 	Cause error
 	Type  Type
 }
 
 func NewDAOError(t Type, cause error) error {
-	return &DAOError{
+	return &Error{
 		Type:  t,
 		Cause: cause,
 	}
 }
 
-func (e *DAOError) Error() string {
+func (e *Error) Error() string {
 	if e.Cause != nil {
 		return fmt.Sprintf("Type %d: %s", e.Type, e.Cause.Error())
 	}