[wp-trac] [WordPress Trac] #44152: Comments "up" link does not cover custom post types and/or REST controllers

[WordPress Trac]

#44152: Comments "up" link does not cover custom post types and/or REST controllers
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 Reporter:  dsifford      |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  REST API      |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:  rest-api
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Comment (by dsifford):

 @danielbachhuber Not totally sure. I'm only very loosely familiar with the
 internals of the API.

 I went in and fixed my singular issue by hooking into
 `rest_prepare_comment` and adjusting for the specific post type by doing a
 similar hard-coding of the endpoint.

 One specific thing that tripped me up in the process of doing this is that
 it doesn't look like it's currently possible to obtain the namespace of a
 given object type easily (if at all).

 The only thing that it appears you have access to is the `rest_base` and
 the `rest_controller_class`  which, although still very useful and
 helpful, only allows someone to build the REST url after the namespace
 itself.

 Digging into `WP_REST_Server`, I saw that there is a `get_namespaces`
 method and an associated `get_namespace_index` method, but it ostensibly
 only allows you to obtain an endpoint's namespace if you have a
 `WP_REST_Request` instance that is actively hitting that endpoint
 available. We don't have that in this case.

 So yeah, I'm a bit stumped here. Happy to work with you and others on this
 though if needed.

 Best case scenario I'd say would be to add a `rest_namespace` field to the
 custom post type. That way, a full REST url could be built from the object
 itself, rather than just the part after the namespace.

 That, or implement a public static getter method for the namespace of
 `WP_REST_Controller`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/44152#comment:2>
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