Not Working on WordPress Multisite

[alexclst]

The JSON Feed at /feed/json only shows up on the primary site in a WP Network. On all other sites in a network the feed URL comes up with a 404 error. The feed works just fine on the primary site, and on single-site WP installs, but does not work at all on the secondary sites of a multisite install.

[alexclst]

I should clarify that not Network Activating the plugin and activating on individual sites works. But this plugin really should sense MU WP and provide the feeds for all sites on a network if activated network-wide.

[danielpunkass]

Good idea! I agree it should work that way if activated network-wide. Thanks for the bug report.

[jeremyfelt]

It's likely this is due to how rewrite rules and plugin activation are handled in multisite. FWIW, it's a complete pain to flush/regenerate rewrite rules or do anything on each site in a network on plugin activation.

A bit of background here that might help potential solutions to this problem: https://jeremyfelt.com/2015/07/17/flushing-rewrite-rules-in-wordpress-multisite-for-fun-and-profit/

If nothing else, that will help with what not to do. 😄

It may also be worth just documenting that rewrite rules need to be flushed. Multisite admins can use approaches such as https://iandunn.name/2015/04/23/flushing-rewrite-rules-on-all-sites-in-a-multisite-network/ to make sure things have been flushed.

Also related: https://core.trac.wordpress.org/ticket/28694

[danielpunkass]

Note to self/us: Notify @LondonAir when this is fixed. https://twitter.com/LondonAir/status/931546752179671040

[danielpunkass]

Thanks @jeremyfelt for the analysis!