@samcarter has very helpfully shown how to capitalize article, journal and book titles in biblatex bibliography (see here) and subtitles (see here).
However, new instances of bibliographic references where I need to capitalize the major words in a title keep cropping up. For example, I now have book chapters, so I use either the InBook or the InCollection types of bib entry; but the result is that the chapter title is capitalized, which is what I want, but the book title is not, which is not what I want.
Following @samcarter's advice, I have looked the code of the chicago-authordate.bbx file here.
From that I have gathered that I nee to add the following line \DeclareFieldFormat{booktitle}{\capitalisewords{#1}} to the code presented in the previous examples (which, again, are here) and (see here). ), as shown below:
\documentclass{scrbook}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
% Bibliography
\usepackage[backend=biber, style=chicago-authordate, hyperref=auto, bibencoding=inputenc, refsection=chapter, doi=false, url=false, isbn=false, eprint=false]{biblatex}
\usepackage[babel,autostyle=true]{csquotes}
% Capitalize article titles and journal names
\usepackage{mfirstuc}
\MFUnocap{a}
\MFUnocap{for}
\MFUnocap{the}
\MFUnocap{of}
\MFUnocap{and}
\MFUnocap{con}
\MFUnocap{il}
\DeclareFieldFormat{jtnoformat}{\capitalisewords{#1}}
\DeclareFieldFormat{stnoformat}{\capitalisewords{#1}}
\DeclareFieldFormat{booktitle}{\capitalisewords{#1}}
\usepackage{xpatch}
\xpatchbibmacro{mag+news+title}{\printfield[noformat]{title}}{\printfield[jtnoformat]{title}}{}{}
\xpatchbibmacro{italtitle+stitle}{\printfield[tnoformat]{title}}{\printfield[jtnoformat]{title}}{}{}
\begin{filecontents*}[overwrite]{sample.bib}
@InBook{Goldthorpe1969,
title = "herbert spencer",
date = 1969,
author = "John H. Goldthorpe",
booktitle = "The founding fathers of social science",
editor = "Timothy Raison",
publisher = "Penguin Books",
location = "Harmondsworth, UK"}
@InCollection{Turner1999,
author = "Bryan S. Turner and Ron Eyerman",
title = "The sociology of generations",
date = 1999,
booktitle = "Classical sociology",
publisher = "Sage",
location = "London",
chapter = 14,
pages = "246--261"}
\end{filecontents*}
\addbibresource{sample.bib}
\begin{document}
\nocite{Goldthorpe1969}.
\nocite{Turner1999}.
\printbibliography
\end{document}
The output shows that the main title of the book is capitalized but not in italics as it was originally (i.e., without the line \DeclareFieldFormat{booktitle}{\capitalisewords{#1}}, in which case it is in italics but not capitalized).
I guess I have chosen the wrong field with booktitle. Is this the case? How's the correct way to do this?
Thank you very much!! Daniel

The original field format for
booktitleis defined inchicago-authordate.cbx, line 100 asYou can combine this with capitalisation like this: