Renew only the reference on section part for \ref

Question

I had to declare \thesection without its fitting chapter. But the reference should always include the \thechapter. Does anyone has a workaround? I guess,

\let\origref\ref
\renewcommand\ref[1]{
    %ref to chapter.%
    \ref{#1}
}

Some more information

class: scrbook

hyperref is used

Tried things

I tried to use

\usepackage[nokeyprefix]{refstyle}
\chapref

but this refs on the section.

Answer 1

References can be prefixed by \p@<counter> that can be defined to contain \thechapter:

\documentclass{report}

% Section numbers without chapter number
\renewcommand*{\thesection}{\arabic{section}}

% Section references with chapter number
\makeatletter
\def\p@section{\thechapter.}
\makeatother

\begin{document}

\chapter{First chapter}
\section{First section}
\section{Second section}
\label{sec:second}
See section \ref{sec:second}.
\end{document}