[wp-trac] [WordPress Trac] #39494: Make it possible for taxonomy query to include children in REST API

[WordPress Trac]

#39494: Make it possible for taxonomy query to include children in REST API
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 Reporter:  jason_the_adams                      |       Owner:  dlh
     Type:  enhancement                          |      Status:  assigned
 Priority:  normal                               |   Milestone:  5.7
Component:  REST API                             |     Version:  4.7
 Severity:  normal                               |  Resolution:
 Keywords:  needs-testing has-patch has-unit-    |     Focuses:  rest-api
  tests                                          |
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Comment (by TimothyBlynJacobs):

 This is looking really great @dlh. Would you mind converting this to a PR?

 I like using `terms`. Either way though we would probably still need a
 more advanced schema if we do support querying by different fields. Since
 we'd want to make sure `terms` is an array of ints when `field` is `id`. I
 think using separate properties implies that you could pass both ids and
 slugs in the same request. I don't think we could properly support that.

 I think we should pull out the whole `tax_query` building into a separate
 method at this point. We might also want to put the `oneOf` in a variable
 in `get_item_schema` and reuse that to ensure they stay in sync. Lastly,
 let's make sure to give a `title` to each `oneOf` case, as well as
 descriptions for the cases and properties.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39494#comment:33>
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