[wp-trac] [WordPress Trac] #43559: wp_ajax_add_meta() does not allow empty values

[WordPress Trac]

#43559: wp_ajax_add_meta() does not allow empty values
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 Reporter:  charlestonsw              |       Owner:
     Type:  enhancement               |      Status:  new
 Priority:  normal                    |   Milestone:  Awaiting Review
Component:  Options, Meta APIs        |     Version:  trunk
 Severity:  normal                    |  Resolution:
 Keywords:  has-unit-tests has-patch  |     Focuses:  rest-api
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Comment (by charlestonsw):

 I will try the patches -- I"m sure they'll be fine as I've modified WP
 Core myself on my VVV box to test the theory behind the original request.

 The question is will these patches make into core someday?   My app is
 working fine , I wrote my own workaround so my users can work with the
 current limitations of WordPress as per the full use case here:

 The full use case --

 1a) Site admin logs into the main services site.
 1b ) Open a custom post type from the WP Admin page.
 1c) Add a custom field "box_title".
 1d) Save the custom field (leaving value as blank) -- PROCESS FAILS per WP
 Core restriction.

 2a) An end user consumes the meta from a remote app via the REST API.
 2b) The app does not set the text inside a HTML element per the Vue app to
 blank because the post has not matching key (see 1b above).


 Could I build a new app that uses the REST API to force meta onto the
 original post and set it to blank, sure can.   But why would I go about
 writing a web app to replicate the base WordPress app with a new admin UX
 just so they can set a custom field value to blank?    I could write an
 entire app to replace WordPress admin and front end UX -- possibly even
 using the REST API much like Calpyso.   But why?

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Ticket URL: <https://core.trac.wordpress.org/ticket/43559#comment:7>
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