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REST API: Encourage proper usage of register_rest_route().

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Calling `register_rest_route()` too early in the loading process has the potential to cause some unintentional problems and pitfalls. Because `register_rest_route()` calls `rest_get_server()` (which creates the `WP_REST_Server` instance), calling the function directly and/or before `rest_api_init` should be discouraged.

For example, if `register_rest_route ()` is called on `init`, the REST API server instance is set up (and all functions added to `rest_api_init` and other related hooks are invoked), even though the current request may not be a REST request. Also, if `register_rest_route()` is called even earlier (say, in an `mu-plugin` file), required endpoints may be missing since normal plugins have not yet been loaded and have not had a chance to register their own action hooks.

This adds a `_doing_it_wrong()` notice the first time `register_rest_route()` is called before `rest_api_init` in a request to encourage best practices for registering REST API routes.

Props kraftbj, desrosj, timothyblynjacobs.
Fixes #45265.

git-svn-id: https://develop.svn.wordpress.org/trunk@44568 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Jonathan Desrosiers 2019-01-11 18:18:41 +00:00
parent d78fa59746
commit 34e3de7b7f
2 changed files with 10 additions and 1 deletions
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7
src/wp-includes/rest-api.php
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@ -17,7 +17,10 @@ define( 'REST_API_VERSION', '2.0' );
/**
* Registers a REST API route.
*
* Note: Do not use before the {@see 'rest_api_init'} hook.
*
* @since 4.4.0
* @since 5.1.0 Added a _doing_it_wrong() notice when not called on or after the rest_api_init hook.
*
* @param string $namespace The first URL segment after core prefix. Should be unique to your package/plugin.
* @param string $route The base URL for route you are adding.
@ -41,6 +44,10 @@ function register_rest_route( $namespace, $route, $args = array(), $override = f
return false;
}
if ( ! did_action( 'rest_api_init' ) ) {
_doing_it_wrong( 'register_rest_route', __( 'REST API routes must be registered on the rest_api_init action.' ), '5.1.0' );
}
if ( isset( $args['args'] ) ) {
$common_args = $args['args'];
unset( $args['args'] );

4
tests/phpunit/tests/rest-api.php
View File

@ -14,9 +14,11 @@ require_once ABSPATH . WPINC . '/rest-api.php';
*/
class Tests_REST_API extends WP_UnitTestCase {
public function setUp() {
parent::setUp();
// Override the normal server with our spying server.
$GLOBALS['wp_rest_server'] = new Spy_REST_Server();
parent::setUp();
do_action( 'rest_api_init', $GLOBALS['wp_rest_server'] );
}
public function tearDown() {