Related Posts: Add filter to show Related Posts on blog/archives page

[chaselivingston]

A few requests have come in to allow Related Posts to display on the main blog or archives pages, not just single post pages, perhaps we could add a filter for this functionality.

[samhotchkiss]

Looks like there already is one. See jetpack-related-posts.php:1022 :
return apply_filters( 'jetpack_relatedposts_filter_enabled_for_request', $enabled );

However, I'm not sure if the JS will support more than one instance of related posts on a page-- I think that may be our bottleneck here. Maybe @xyu can chime in there?

[xyu]

Unfortunately not 😞 our JS/CSS currently only supports displaying one related post section per page and is thus restricted to single posts/pages. Our APIs are not restricted however so I suppose it's possible to build something like this into a theme / plugin using the provided Jetpack_RelatedPosts_Raw() class:

https://github.com/Automattic/jetpack/blob/master/modules/related-posts/jetpack-related-posts.php#L1076-L1126

EDIT: A usage example, this just prints out titles for related items so not very useful but one can inflate the posts and do whatever with them. https://gist.github.com/xyu/1ad9f53bb355ec6c868b

[richardmtl]

Requested in 2306875-t

[jeherve]

Closing as duplicate of #409