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href 内的 citefield

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href 内的 citefield

我的参考书目中有一个特殊字段，称为adsurl，我想将此 url 显示在我的文件中作为链接。

但是，当我尝试这样做时，href 会抛出一个非常奇怪的错误。它会进入某种无限循环，不断提示

! Undefined control sequence.
 \filename@simple ...#2\\}\fi \edef \filename@base 
                                              {#1}

梅威瑟：

\documentclass[a4paper,12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{filecontents}

\begin{filecontents*}{\jobname.bib}
@online{elk,
 author       = {Anne Elk},
 title        = {On the Theory of Brontosauruses},
 adsurl       = {https://example.edu/~elk/bronto.html},
}
\end{filecontents*}


\usepackage[hyperref,backend=biber]{biblatex}
\usepackage{hyperref}
\addbibresource{\jobname.bib}

\begin{filecontents*}{biblatex-dm.cfg}
 \DeclareDatamodelFields[type=field, datatype=literal, skipout=false]{adsurl}
 \DeclareDatamodelEntryfields{adsurl}
\end{filecontents*}

\begin{document}
 \cite{elk} %this works
 \citefield{elk}{adsurl} %this also works
 \href{\citefield{elk}{adsurl}}{ads} %this does not work
\end{document}

我怎样才能接受URLhref的输出？citefield

答案1

感谢 moewe 提供的链接，我得以修复此问题。所以我决定回答此问题，这样人们就不必点击其他问题了。

\documentclass[a4paper,12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{filecontents}

\begin{filecontents*}{\jobname.bib}
@online{elk,
author       = {Anne Elk},
title        = {On the Theory of Brontosauruses},
adsurl       = {https://example.edu/~elk/bronto.html},
}
\end{filecontents*}


\usepackage[hyperref,backend=biber]{biblatex}
\usepackage{hyperref}
\addbibresource{\jobname.bib}

\begin{filecontents*}{biblatex-dm.cfg}
\DeclareDatamodelFields[type=field, datatype=literal, skipout=false]{adsurl}
\DeclareDatamodelEntryfields{adsurl}
\end{filecontents*}

%Here's the trick:
\DeclareCiteCommand{\ads}
 {\boolfalse{citetracker}%
 \boolfalse{pagetracker}%
 \usebibmacro{prenote}}
 {\href{\thefield{adsurl}}{ads}}
 {\multicitedelim}
 {\usebibmacro{postnote}}

\begin{document}
 \cite{elk}
 \citefield{elk}{adsurl}
 \ads{elk}
\end{document}

有关更多解释，请参阅链接的问题。

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