自定义 biblatex harvard（作者年份）风格

Question

希望有人能帮帮我！
我正在努力解决我的引用样式中的一个错误。我需要使用带有脚注的改良哈佛样式：
² Vgl. Robinson et al. (2017)
我的问题是，同一作者在一年内撰写的 2 篇文章没有出现在索引中。它们应该在脚注中产生“Robinson (2017)”和“Robinson (2017b)”，但没有。我只是不知道正确的 printfield 命令，因为它\printbibliography会产生所需的输出。

我通过使用以下配置实现了这一点：

\usepackage[autocite=footnote,style=authoryear-ibid,maxcitenames=1,natbib=true,backend=biber]{biblatex}

\DefineBibliographyStrings{german}{%
    andothers = {et al.},
}

\DeclareCiteCommand{\footcite}[\mkbibfootnote]
    {\usebibmacro{prenote}}
    {\usebibmacro{citeindex}
        \printnames{labelname}%
        \setunit{\addnbspace}
        \printtext[parens]{\printfield{year}}}
    {\multicitedelim}
    {\usebibmacro{postnote}}

参考书目如下：

@book{Crusoe2017,
 author = {Crusoe, Robinson},
 year = {2017},
 title = {The Survival},
 publisher = {{Island Publishing}},
 isbn = {978-1234567890}
}

@book{Crusoe2017b,
 author = {Crusoe, Robinson},
 year = {2017},
 title = {The Survival - Day 2},
 publisher = {{Island Publishing}},
 isbn = {978-1234567800}
}

最后，文件本身如下所示：

Crusoe states in his first publication\footcite[vgl][S. 75 f.]{Crusoe2017}   
(...) in contrast to his secone one\footcite[vgl][S. 5 f.]{Crusoe2017}

产生如下两个脚注：
²vgl Crusoe (2017), S. 75 f.
³vgl Crusoe (2017), S. 5 f.

最后一个脚注应该有一个附加索引，这在最终的参考书目中是可以的。
所以如果有人能提示一下该修改什么，那就太好了，谢谢！

Answer 1

您重新定义了\footcite命令，以便在指定时仅打印yearbibentry 的内容\printfield{year}。如果您还想拥有 dateextra 字段，则应\printlabeldateextra改为使用。

在全：

\documentclass{article}

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@book{Crusoe2017,
 author = {Crusoe, Robinson},
 year = {2017},
 title = {The Survival},
 publisher = {{Island Publishing}},
 isbn = {978-1234567890}
}

@book{Crusoe2017b,
 author = {Crusoe, Robinson},
 year = {2017},
 title = {The Survival - Day 2},
 publisher = {{Island Publishing}},
 isbn = {978-1234567800}
}
\end{filecontents}

\usepackage[autocite=footnote,style=authoryear-ibid,maxcitenames=1,natbib=true,backend=biber]{biblatex}

\DefineBibliographyStrings{german}{%
    andothers = {et al.},
}

\DeclareCiteCommand{\footcite}[\mkbibfootnote]
    {\usebibmacro{prenote}}
    {\usebibmacro{citeindex}
        \printnames{labelname}%
        \setunit{\addnbspace}
        \printtext[parens]{\printlabeldateextra}}
    {\multicitedelim}
    {\usebibmacro{postnote}}

\addbibresource{\jobname.bib}

\begin{document}

Crusoe states in his first publication\footcite[vgl][S. 75 f.]{Crusoe2017}   
(...) in contrast to his second one\footcite[vgl][S. 5 f.]{Crusoe2017b}

\printbibliography

\end{document}