### Bug description

## The issue

I believe I found a bug where shared metadata for posts is not shown on listing page of a website, but it is shown on the individual posts.

## Description and minimal example

I have a website containing a listing page with the following structure:

```default
|- documents/
|-- index.qmd
|-- posts/
|--- _metadata.yml
|--- post-1/index.md
|--- ...
|--- post-100/index.md
```

Inside `_metadata.yml` I've specified some default options for the posts:

```default
date: last-modified
author: Michael
```

When I preview the site and visit the pages for these posts, I can see that the params in `_metadata.yml` have been passed through. **However**, when I visit the `documents` listing page on the site the default date and author are not showing up for the list items.

My `index.qmd` file looks like this:

```default
---
title: Documents
listing:
  sort: "date desc"
  contents: "posts"
  type: "table"
  page-size: 30
  sort-ui: true
  filter-ui: true
  categories: true
  feed: false
  field-display-names:
    author: "Author(s)"
    date: Last modified
page-layout: full
title-block-banner: "#EDF3F9"
title-block-banner-color: body
search: true
---

```

Here is a screenshot to clarify. Posts where the date and author have had their values filled manually show that metadata on the listing page, but posts where I'm using the defaults don't show the metadata on the listing page.

![Screen Shot 2022-06-10 at 11 32 50 AM](https://user-images.githubusercontent.com/51542091/173120496-f9b26d17-b984-45a9-9a2b-60e1791beb8d.png)

## Quarto Check

Using OSX:

```default
quarto check

[✓] Checking Quarto installation......OK
      Version: 0.9.563
      Path: /Applications/quarto/bin

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.9.1 (Conda)
      Path: /Users/Michael/Library/r-miniconda/envs/r-reticulate-mne/bin/python
      Jupyter: 4.7.0
      Kernels: ir, python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........OK
      Version: 4.1.1
      Path: /Library/Frameworks/R.framework/Resources
      LibPaths:
        - /Users/Michael/Library/R/4.1/library
        - /Library/Frameworks/R.framework/Versions/4.1/Resources/library
      rmarkdown: 2.13

[✓] Checking Knitr engine render......OK
```

### Checklist

- [X] [formatted your issue](https://yihui.org/issue/#please-format-your-issue-correctly) so it is easier for us to read?
- [X] included a minimal, self-contained, and reproducible example?
- [X] documented the quarto version you're running, by providing the output produced by `quarto check` in a terminal in your issue?
- [X] documented the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] documented which operating system you're running? If on Linux, please provide the specific distribution as well.
- [X] upgraded to the latest version, including your versions of R, the RStudio IDE, and relevant R packages?
2022-06-10T17:39:03Z
mccarthy-m-g
bug
closed
Shared metadata for posts is not shown on listing page
https://github.com/quarto-dev/quarto-cli/issues/1125