# Custom type disappears in subsequent citations

Biblatex doesn't show the same source on successive citations. I tried it with dashed=false, but it doesn't work. How can I make that the work is always fully cited, even on subsequent citations?

\RequirePackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@interview{homer,
interviewee = {Homer Simpson},
interviewer = {Bart Simpson},
date        = {2018-07-25},
}
\end{filecontents*}
\begin{filecontents}{interview.dbx}
\DeclareDatamodelEntrytypes{interview}
\DeclareDatamodelFields[type=list,datatype=name]{
interviewer,
interviewee,
}

\DeclareDatamodelEntryfields[interview]{
doi,
eprint,
eprintclass,
eprinttype,
interviewer,
interviewee,
location,
note,
pubstate,
}
\end{filecontents}
\documentclass[ngerman]{article}
\usepackage{babel}
\usepackage{csquotes}
\usepackage[datamodel=interview,backend=biber, dashed=false, style=authortitle, citestyle=verbose,]{biblatex}
\usepackage{hyperref}

\NewBibliographyString{interview}
\DefineBibliographyStrings{german}{%
interview   = {Interview},
}

\DeclareNameAlias{interviewee}{author}

\DeclareBibliographyDriver{interview}{%
\usebibmacro{bibindex}%
\usebibmacro{begentry}%
\printnames{interviewee}%
\newunit\newblock
\bibstring{interview}%
\printnames{interviewer}%
\newunit\newblock
\printfield{note}%
\newunit\newblock
\usebibmacro{location+date}%
\newunit\newblock
\usebibmacro{doi+eprint+url}%
\newunit\newblock
\setunit{\bibpagerefpunct}\newblock
\usebibmacro{pageref}%
\newunit\newblock
\iftoggle{bbx:related}
{\usebibmacro{related:init}%
\usebibmacro{related}}
{}%
\usebibmacro{finentry}}

\begin{document}
\footcite{homer}
\footcite{homer}

\printbibliography
\end{document}

• Or is this about the citations? dashed=false won't help there at all. What output would you expect? – moewe Dec 13 '18 at 19:12
• Your right, twice a citestyle doens't make sense at all. I corrected it in the code. The first footnote is the full citation but the second is only a small green box. I would like to have the full citation twice. – derd Dec 13 '18 at 19:28
• style=authortitle, citestyle=verbose, should be the same as style=verbose,. Usually the subsequent citation is a shorter form with only author and title. Do you still want the full citation on subsequent cites in this case? – moewe Dec 13 '18 at 19:29
• Code from tex.stackexchange.com/q/464361/35864 – moewe Dec 13 '18 at 19:35
• Oh, I didn't knew that those two citestyles are the same as only verbose. Yes, I want the full citation on subsequent cites. – derd Dec 13 '18 at 21:08

The styles of the verbose family show a full citation (i.e. the full reference/bibliography entry) on a first cite and a shorter author-title citation on subsequent citations.

For the shorter author-title citation the verbose styles use the usual labelname and labeltitle fields. Those fields are artificial fields that take their contents from other fields in a certain order of precedence. labelname the first of (short)author, (short)editor and translator; labeltitle the first of shorttitle, title, maintitle. Our @interview has none of these fields and so the citation remains completely empty. One solution to get a citation would be to include fields that @interview has in the definitions of labelname and labeltitle so that these fields don't come out as empty.

In the comments you mentioned that @interviews should just be cited as full on subsequent citations as well, hence we take a slightly different route. The following MWE sets up a general structure to treat subsequent (short in biblatex-speak) citations of particular entry types differently from the rest.

\RequirePackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@interview{homer,
interviewee = {Homer Simpson},
interviewer = {Bart Simpson},
date        = {2018-07-25},
}
\end{filecontents*}
\begin{filecontents}{interview.dbx}
\DeclareDatamodelEntrytypes{interview}
\DeclareDatamodelFields[type=list,datatype=name]{
interviewer,
interviewee,
}

\DeclareDatamodelEntryfields[interview]{
doi,
eprint,
eprintclass,
eprinttype,
interviewer,
interviewee,
location,
note,
pubstate,
}
\end{filecontents}
\documentclass[ngerman]{article}
\usepackage{babel}
\usepackage{csquotes}
\usepackage[datamodel=interview,backend=biber, dashed=false, style=verbose]{biblatex}
\usepackage{hyperref}

\NewBibliographyString{interview}
\DefineBibliographyStrings{german}{%
interview   = {Interview},
}

\DeclareNameAlias{interviewee}{author}

\DeclareBibliographyDriver{interview}{%
\usebibmacro{bibindex}%
\usebibmacro{begentry}%
\printnames{interviewee}%
\newunit\newblock
\bibstring{interview}%
\printnames{interviewer}%
\newunit\newblock
\printfield{note}%
\newunit\newblock
\usebibmacro{location+date}%
\newunit\newblock
\usebibmacro{doi+eprint+url}%
\newunit\newblock
\setunit{\bibpagerefpunct}\newblock
\usebibmacro{pageref}%
\newunit\newblock
\iftoggle{bbx:related}
{\usebibmacro{related:init}%
\usebibmacro{related}}
{}%
\usebibmacro{finentry}}

\newbibmacro*{cite:short:interview}{%
\usebibmacro{cite:full:citepages}%
\usedriver
{\DeclareNameAlias{sortname}{default}}
{\thefield{entrytype}}}}

% cite:short is really 'cite:subsequent'
\renewbibmacro*{cite:short}{%
\ifbibmacroundef{cite:short:\strfield{entrytype}}
{\printnames{labelname}%
\setunit*{\printdelim{nametitledelim}}%