[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:
     Type:  enhancement      |      Status:  new
 Priority:  normal           |   Milestone:  Future Release
Component:  REST API         |     Version:  4.7
 Severity:  normal           |  Resolution:
 Keywords:  needs-testing    |     Focuses:  rest-api
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Comment (by birgire):

 @jason_the_adams I uploaded the [attachment:39494.3.diff] patch where I
 played with a new {{{categories_object}}} query parameter, just to
 understand better how it works and to preserve the previous
 {{{categories}}} query parameter setup. Also I'm not sure it's supported
 to use a mixed schema (array+object) for query parameters in
 {{{WP_REST_Posts_Controller::get_collection_params()}}}. It supports
 {{{term_ids}}}, {{{term_slugs}}} and {{{include_children}}}. The
 {{{term_slugs}}} takes precedence over {{{term_ids}}}.

 [attachment:39494.3.diff] has the tests:

 - {{{test_get_items_categories_by_term_ids_and_include_children_true()}}}.
 -
 {{{test_get_items_categories_by_term_ids_and_include_children_false()}}}.
 -
 {{{test_get_items_categories_by_term_slugs_and_include_children_true()}}}.
 -
 {{{test_get_items_categories_by_term_slugs_and_include_children_false()}}}.

 The two tests methods in [attachment:39494.2.diff] ran successfully in
 isolation, but not for e.g. the restapi group. But these four tests
 methods above seems to run successfully for that group.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39494#comment:20>
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