FR: When default author and post author are identical except for affiliation, allow override rather than duplicate

[swiderskiji]

Description

I am creating a blog/site where I am the only author, so for the most part it makes sense for me to set a default author in metadata.yml, and I have. But I'm not an academic and for the most part, I am writing only as an individual, not on behalf of or related to my employer or any other affiliation, so my default author doesn't have any affiliation attached:

  - name:
      given: J. I.
      family: Swiderski
    url: https://jski.net/

However, for some posts, for example where I am sharing documents written with and as public statements of an organization I'm part of, I would like to have such affiliation listed with the post:

author:
  - name:
      given: J. I.
      family: Swiderski
affiliation: Example Advisory Council
affiliation-url: http://example.com

However, when I try this, I end up with one author -- with no affiliation -- at the top, and two authors in the citation data at the bottom:
author = {Swiderski, J. I. and Swiderski, J. I.},

(I wonder if this might be a side-effect of the solution to #8860...?)

Is it possible, or could it be possible, to have an affiliation listed on some posts and not others without having to enter the author name information on every post?

thanks,

[mcanouil]

Could you share a small self-contained "working" (reproducible) example to work with, i.e., a complete Quarto document or a Git repository? The goal is to make it as easy as possible for us to recreate your problem so that we can fix it: please help us help you! Thanks.

Note that both authors and affiliations have "id", to allow reuse: https://quarto.org/docs/journals/authors.html
I suggest to go through the authors/affiliations and come back with a concrete example, likely as a Git repository in this case.

---

You can share a self-contained "working" (reproducible) Quarto document using the following syntax, i.e., using more backticks than you have in your document (usually four ````).
See https://quarto.org/bug-reports.html#small-is-beautiful-aim-for-a-single-document-with-10-lines.

If you have multiple files (and if it is absolutely required to have multiple files), please share as a Git repository.

R	Python
````qmd --- title: "Reproducible Quarto Document" format: html engine: knitr --- This is a reproducible Quarto document. {{< lipsum 1 >}} ```{r} x <- c(1, 2, 3, 4, 5) y <- c(1, 4, 9, 16, 25) plot(x, y) ``` {#fig-placeholder} {{< lipsum 1 >}} The end after @fig-placeholder. ````	````qmd --- title: "Reproducible Quarto Document" format: html engine: jupyter --- This is a reproducible Quarto document. {{< lipsum 1 >}} ```{python} import matplotlib.pyplot as plt x = [1, 2, 3, 4, 5] y = [1, 4, 9, 16, 25] plt.plot(x, y) plt.show() ``` {#fig-placeholder} {{< lipsum 1 >}} The end after @fig-placeholder. ````

Additionally and if not already given, please share the output of quarto check within a code blocks (i.e., using three backticks ```txt), see https://quarto.org/bug-reports.html#check.