1896 fetching other collections from preview

[cdennington]

Summary

Allowing users to access data from other collections whilst in the preview pane.

See the comments here: #1896

This is my first time contributing to this repo, so I'm not 100% across the code base, so feedback is welcome.

I've tested this on a project I am working on at the moment and it worked as expected:

• I was able to pull in all posts to a listing page
• I was able to render the header and footer which are separate collections on every page

Checklist

Please add a x inside each checkbox:

• I have read the contribution guidelines.
• Code is formatted via running yarn format.
• Tests are passing via running yarn test.
• The status checks are successful (continuous integration). Those can be seen below.

[pbredenberg]

Would love to see this feature in Netlify CMS. Anyone from the team interested in taking a look?

[nicksull]

This would be a great feature.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[martinjagodic]

@cdennington are you still interested in moving this forward?

[cdennington]

@martinjagodic I'd happily be involved in pushing this one out, what do you need from me? Other than fixing conflicts

[martinjagodic]

@cdennington great. Please solve conflicts first and then we will review. Thanks!

[martinjagodic]

@cdennington linter is failing. Please run npm run lint locally to see the problem.

[Boelensman1]

@martinjagodic, cdennington didn't have the time to finish this, so I took over.

With the docs moving to a different repo, I guess I should just make a seperate pull request there to add the docs for this?

[martinjagodic]

With the docs moving to a different repo, I guess I should just make a seperate pull request there to add the docs for this?

Yes please

[Boelensman1]

Added the pull request for the documentation (written by @cdennington) here: decaporg/decap-website#55.

Not sure why the macos build is failing, it seems to get stuck installing dependencies. No changes have been made to those.

[demshy]

This is great @Boelensman1, MacOS build is a bit cranky sometimes, don't worry about it :)

Left you one little question otherwise this is good to go and can be released today/tomorrow with a few other PRs.