i18n: support "duplicate" setting on list fields

[cbix]

Currently, list fields only support i18n: true and i18n: false. For many cases (like a picture carousel) the content needs to be the same among all locales, where i18n: duplicate would make sense.

Possible workarounds are using a relation widget and storing the content in a separate collection or setting i18n: false and fetching it from the default locale manually. This is less intuitive for either the editors or the developer.

[erezrokah]

The challenge here was to mirror the widget behaviour in the side by side editor, so it was postponed as a part of the original PR.

[cbix]

I just realized that even other widgets are not storing anything in my frontmatter with i18n: duplicate so I need to deal with fetching data from the default locale anyway.
Which makes this purely a netlify-cms frontend issue.

[barthc]

I just realized that even other widgets are not storing anything in my frontmatter with i18n: duplicate

The duplicate flag should work for other widgets, can you show your config?

[cbix]

@barthc Ah, you're right, it does work. I probably messed something up by changing a field form i18n: false to i18n: duplicate and of course the field didn't magically get added in the translated markdown file ;)

[cbix]

@barthc Ok I figured out the hidden widget doesn't work with i18n: duplicate which is kinda crucial for my case to work because editors are supposed to create pages in different collections that get built using different templates.
Versions are netlify-cms-app 2.12.24 and netlify-cms-core 2.30.7 and I'm testing with netlify-cms-proxy-server.

My config.yml:

...
i18n:
  structure: multiple_files
  locales: [en, de]
  default_locale: en

collections:
  - name: content-pages
    label: Content Pages
    folder: content/pages
    create: true
    i18n: true
    fields:
      - {label: Template Key, name: templateKey, widget: hidden, default: content-page, i18n: duplicate}
      - {label: Title, name: title, widget: string, i18n: true}
      - {label: Image, name: image, widget: image, i18n: duplicate, required: false}
      - {label: Body, name: body, widget: markdown, i18n: true}

After creating a new page in netlify-cms, I get two new markdown files in content/pages.
test.en.md:

---
templateKey: content-page
title: test
image: /img/test.png
---
test body

and test.de.md:

---
title: testfoo
image: /img/test.png
---
test inhalt

In my previous test I had a collection with create: false and manually set the templateKey field for development.
Edit: this might be #4356

[blackb1rd]

It's a same issue as #4356

Workaround is to change hidden widget to string widget and also remove default settings value. Then input "content-page" into the string widget.

[khawarizmus]

Any timeline for this feature?

[erezrokah]

Any timeline for this feature?

The best way to move this forward is to submit a PR for it @gimyboya

[michaelmannucci]

Any progress here?