titlesec-package prevents TOC from showing full subsection number

Question

I'm using titlesec for customizing section titles. The problem is, that it prevents TOC from showing full (sub)subsection numbers. This applies to referring to section labels as well:

\documentclass{article}
\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{titlesec} % Allows customization of titles
\renewcommand\thesection{\arabic{section}} % Arabic numerals for the sections
\renewcommand\thesubsection{\arabic{subsection}} % Arabic numerals for subsections
\renewcommand\thesubsubsection{\arabic{subsubsection}} % Arabic numerals for subsubsections
\titleformat{\section}[block]{\Large\scshape\centering}{\thesection}{1em}{} 
\titleformat{\subsection}[block]{\large\scshape}{\thesection.\thesubsection}{1em}{} 
\titleformat{\subsubsection}[block]{\large\scshape}{\thesection.\thesubsection.\thesubsubsection}{1em}{}

\begin{document}
\tableofcontents

\vspace{1cm}
\hrule

\section{section 1}
\subsection{subsection 1.1}
\subsection{subsection 1.2}
\label{subsection 1.2}

\section{section 2}
\subsection{subsection 2.1}
\subsection{subsection 2.2}
Referring to subsection \ref{subsection 1.2}.
\subsubsection{subsubsection 2.2.1}

\end{document}

What do I have to change/specify in order to have the full number shown in TOC/references? Thanks in advance!

Answer 1

You need to complete/fix the re-definitions of subsections:

\documentclass{article}
\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{titlesec}
\renewcommand\thesection{\arabic{section}}
\renewcommand\thesubsection{\arabic{section}.\arabic{subsection}} % %new code
\renewcommand\thesubsubsection{\arabic{section}.\arabic{subsection}.\arabic{subsubsection}} % new code
\titleformat{\section}[block]{\Large\scshape\centering}{\thesection}{1em}{}
\titleformat{\subsection}[block]{\large\scshape}{\thesubsection}{1em}{}
\titleformat{\subsubsection}[block]{\large\scshape}{\thesubsubsection}{1em}{}

\begin{document}
\tableofcontents

\vspace{1cm}
\hrule

\section{section 1}
\subsection{subsection 1.1}
\subsection{subsection 1.2}
\label{subsection 1.2}

\section{section 2}
\subsection{subsection 2.1}
\subsection{subsection 2.2}
Referring to subsection \ref{subsection 1.2}.
\subsubsection{subsubsection 2.2.1}

\end{document}