biblatex 群组字段过滤器

Question

有两个主要原因导致它不能按预期工作。

正如所提到的保罗·斯坦利在评论中该字段groups不是标准字段，因此 Biber 无法识别。这意味着该字段的内容groups不会写入文件.bbl，进而意味着biblatex无法访问其内容。

你必须声明groups按照以下方式声明该字段将字段“tome”添加到 biblatex 条目
其次，更严重的是，\iffieldequalstr{<field>}{<string>}您只将字段的(整个)内容<field>与字符串进行比较<string>。这意味着\iffieldequalstr{groups}{Group1}当 groups 为时，会产生 false。Paul groups = {Group1,Group2},Stanley 的评论中也提到了这一点。

喜欢古斯布斯和保罗·斯坦利我建议您查看一下，keywords因为该字段旨在将条目过滤到组中。

\documentclass{article}

\usepackage[style=authoryear,backend=biber]{biblatex}

\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@misc{A01,
  author   = {Author, A.},
  year     = {2001},
  title    = {Alpha},
  keywords = {Group1,Group2},
}
@misc{B02,
  author   = {Buthor, B.},
  year     = {2002},
  title    = {Bravo},
  keywords = {Group1},
}
@misc{C03,
  author   = {Cuthor, C.},
  year     = {2003},
  title    = {Charlie},
  keywords = {Group2},
}
\end{filecontents}

\addbibresource{\jobname.bib}

\begin{document}
\nocite{*}

\printbibliography[keyword=Group1]
\end{document}

如果您已经用而groups不是填充了数百个条目，则keywords可以使用 Biber 重新映射字段。

\DeclareSourcemap{
  \maps[datatype=bibtex]{
    \map[overwrite]{
      \step[fieldsource=groups, final]
      \step[fieldset=keywords, fieldvalue={,}, append]
      \step[fieldset=keywords, origfieldval, append]
      \step[fieldsource=keywords, match=\regexp{\A,}, replace={}]
    }
  }
}

编辑现在使用古斯布斯' 方法来自\DeclareSourceMap 不起作用以避免在没有项目的情况下使用前导逗号。

如果由于某种原因，您执着于某个groups字段的想法并且根本不想参与keywords，这里有一个粗略的测试实现，它循环遍历具有逗号分隔值的字段并检查是否Group1包含在该groups字段中的列表元素。

\documentclass{article}

\usepackage{filecontents}

% make the groups field known to biblatex
\begin{filecontents*}{groups.dbx}
\DeclareDatamodelFields[type=field,datatype=literal]{groups}
\DeclareDatamodelEntryfields{groups}
\end{filecontents*}
\usepackage[style=authoryear,backend=biber,datamodel=groups]{biblatex}

% traverse the groups field to find a match
\makeatletter
\newtoggle{bastianblx@isgroup}

\newcommand*{\bastianblx@ifmatch}[2]{%
  \ifstrequal{#1}{#2}
    {\toggletrue{bastianblx@isgroup}\listbreak}
    {}}

% switch the order of the arguments for easier \expandafter work
\newcommand*{\bastian@forcsvlist}[2]{%
  \forcsvlist{#2}{#1}}

\defbibcheck{Group1}{%
  \togglefalse{bastianblx@isgroup}%
  % 31 \expandafters for five levels of expansion
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter
  \bastian@forcsvlist
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter\expandafter\expandafter\expandafter\expandafter
  \expandafter
  {\thefield{groups}}{\bastianblx@ifmatch{Group1}}%
  \iftoggle{bastianblx@isgroup}{}{\skipentry}%
}
\makeatother

\begin{filecontents}{\jobname.bib}
@misc{A01,
  author = {Author, A.},
  year   = {2001},
  title  = {Alpha},
  groups = {Group1,Group2},
}
@misc{B02,
  author = {Buthor, B.},
  year   = {2002},
  title  = {Bravo},
  groups = {Group1},
}
@misc{C03,
  author = {Cuthor, C.},
  year   = {2003},
  title  = {Charlie},
  groups = {Group2},
}
\end{filecontents}

\addbibresource{\jobname.bib}

\begin{document}
\nocite{*}

\printbibliography[check=Group1]
\end{document}

所有解决方案显示

Answer 1