Make nested collections work with a flat content structure

[martinjagodic]

As discussed in #4969, I would like to see nested collections work with the flat content structure.

Currently, nested collections work with only one type of content structure, where every markdown file has to be in its own folder:

content
└── pages
    ├── authors
    │   ├── author-1
    │   │   └── index.md
    │   └── index.md
    ├── index.md

I would like to see it work also with a flatter structure, like this one:

content
└── pages
    ├── authors
    │   ├── author-1.md
    │   └── index.md
    ├── index.md

[erezrokah]

Hi @martinjagodic, thank you for opening the issue. This would be great to have.

Would the logic be to treat any non index.md file as a child of the index.md file for UI purposes?
We do want to show author-1.md only when someone navigates to authors correct?
See https://netlify-cms-widget-parent.netlify.app/#/collections/pages:

[martinjagodic]

@erezrokah yes, this is how I imagine it.

[dylanirlbeck]

I'd also love to see this feature!

[dylanirlbeck]

@erezrokah Can you outline the expected work for this feature? Trying to gauge what the commitment would be in case I have time to contribute.

[erezrokah]

Hi @dylanirlbeck, thanks for initiating!

I would classify this as medium size effort for someone who is not familiar with the CMS codebase.

The relevant code is here:
https://github.com/netlify/netlify-cms/blob/master/packages/netlify-cms-core/src/components/Collection/NestedCollection.js

To resolve the issue we would need to consider file siblings of index.md as children (this only happens for directories next to index.md).

[Dirklectisch]

I had a quick look at what the current behaviour is. Looks like non index files are currently shown one level higher than they should be in the entries listing.

One open question is probably if non index files should also show up in the menu structure. What should happen if you click one of those files, would you be able to create new files in that position of the structure. Should the underlying system convert the single file to the folder structure if you do?

[Matt-Freeland]

I've also run into this issue trying. Stuff gets pretty strange when there is on index.md file.

My project is organized into folders like this

content
└── Category
    ├── Subcategory
    │   ├── sub-thing.md
    │   └── sub-thing2.md
    ├── Subcategory-2
    │   ├── another-sub-thing.md
    │   └── another-sub-thing-too.md
    ├── thing.md

Here is my config.yaml

collections:
  - name: "demo"
    label: "Docs"
    label_singular: 'Doc'
    folder: "demo"
    create: true
    slug: "{{slug}}"
    nested: 
      depth: 100 
      summary: "{{slug}}"
    summary: "{{filename}}"
    extension: mdx
    format: frontmatter
    fields: 
      - {label: "Sidebar Label", name: "sidebar_label", widget: "string", required: false}
      - {label: "Title", name: "title", widget: "string"}
      - {label: "ID", name: "id", widget: "string"}
      - {label: "Sidebar Position", name: "sidebar_position", widget: "number", value_type: "int", min: 0, required: false}
      - {label: "tags", name: "tags", widget: "list", default: ["demo"], required: false}
      - {label: "Body", name: "body", widget: "markdown", required: false}
    meta: { path: {label: 'Path', widget: 'string', index_file: slug }}

The output from the CMS is this:

Note that the second subfolder is entirely missing - but all the files are there. Is there a known workaround for this?

[tangleMesh]

I would also love to see such a feature added.
We do also have a more complex structure like the one mentioned by @Matt-Freeland and it is not possible for us to create different collections for the subfolders.

content
└── Category
    ├── Subcategory
    │   ├── sub-thing.md
    │   └── sub-thing2.md
    ├── Subcategory-2
    │   ├── another-sub-thing.md
    │   └── another-sub-thing-too.md
    ├── thing.md

Could it be possible to simply extend the behavior of index_file by making fields values available like

meta: { path: { label: 'Path', widget: 'string', index_file: '{fields.filename}' }}

With this solution it could be possible to enable custom file names and flat hierarchies in subfolders without much effort? @erezrokah

[erezrokah]

Could it be possible to simply extend the behavior of index_file by making fields values available like

meta: { path: { label: 'Path', widget: 'string', index_file: '{fields.filename}' }}

With this solution it could be possible to enable custom file names and flat hierarchies in subfolders without much effort? @erezrokah

Thanks @tangleMesh, with your suggestion - what would be the index file sub-thing.md or sub-thing2.md? That is, what would show up as the parent in the tree, and which entries will be the children?

I think the logic to implement is still this one:

Would the logic be to treat any non index.md file as a child of the index.md file for UI purposes?

That is, the index file is the parent, and any sibling is a child.

If anyone wants to contribute, the code is here:
https://github.com/netlify/netlify-cms/blob/bb7174d3b7cec3f0d45d6158043ae1b4d3182009/packages/netlify-cms-core/src/components/Collection/NestedCollection.js

[adunkman]

👋 Hiya!

I’d love to take a pass at implementing this — @eric-gade and I are finding a need for it on a current project. We poked around a bit, and have also come across the index.md issue being discussed.

I think what makes the most sense (to me, at least) is, for nested collections, always show folders in the left navigation and only immediate children of that folder as pages in the main list view. Here’s a few examples — I’ll note that this goes against the idea of "filtering" as implied by the URL structure of "filter" but seems to be the simplest:

Filesystem	Shown in left navigation	Shown in main list view
nested-collection index.md	nested-collection (selected item)	index.md
nested-collection index.md about.md sub-collection index.md	nested-collection (selected item) sub-collection	index.md about.md
nested-collection index.md about.md sub-collection index.md	nested-collection sub-collection (selected item)	index.md

(and so on — the pattern repeats recursively).

The effect of this behavior change:

• This feature would be implemented.
• As compared to the current implementation, folders with only index.md would now be present in the left hand navigation and the file would be missing from its parent folder; you’d need to select the folder from the navigation to see its file.

I think I have this mostly implemented, but will button it up tomorrow and send a pull request over if I don’t hear any significant objections. 🙂