问题描述：

I\'m trying to work with the Wordpress API to update a user\'s information via a POST request. The information is stored in a custom JSON field, that I registered like so:

public function handle_user_info() {
register_rest_field( \'user\', \'personal_info\', array(
\'get_callback\' => array( $this, \'get_user_info_callback\' ),
\'update_callback\' => array( $this, \'post_user_info_callback\' ),
\'schema\' => null 
));        
} 

Here\'s the GET callback:

public function get_user_info_callback( $user ) {  
$userID = $user[ \'id\' ]; 
return array(
\'rcp_user_first\' => get_user_meta( $userID, \'rcp_user_first\', true ),
\'rcp_user_last\' => get_user_meta( $userID, \'rcp_user_last\', true ),
\'rcp_user_location\' => get_user_meta( $userID, \'rcp_user_location\', true ),
\'rcp_postal_address\' => get_user_meta( $userID, \'rcp_postal_address\', true ),
\'rcp_email\' => get_userdata( $userID )->user_login
);           
}

All of the above works fine. When I make a GET request, here\'s what is returned (shortened version):

{
\"id\": 1,
\"name\": \"John\",
\"url\": \"http://example.com\",
\"description\": \"\",
\"slug\": \"admin\",
...
\"personal_info\": {
\"rcp_user_first\": \"John\",
\"rcp_user_last\": \"Doe\",
\"rcp_user_location\": \"EU\",
\"rcp_postal_address\": \"101 Fake Street\",
\"rcp_email\": \"admin@example.com\"
}
...
}

My problem is with the POST callback. I can\'t figure out how to write it to update the values in the personal_info field. My guess was that something like this would work:

public function post_user_info_callback( $value, $user, $fieldName ) { 
return array(
\'rcp_user_first\' => update_user_meta( 1, \'rcp_user_first\', \'Mark\' ),
\'rcp_user_last\' => update_user_meta( 1, \'rcp_user_last\', \'Smith\' ),
\'rcp_user_location\' => update_user_meta( 1, \'rcp_user_location\', \'NON_EU\' ),
\'rcp_postal_address\' => update_user_meta( 1, \'rcp_postal_address\', \'202 Fantasy Street\' )
);           
}

However this does not work. By the way I\'m only testing with Postman right now which is why I\'m using static data, so 1 here stands for the user ID.

Any ideas?

网友观点：

public function post_user_info_callback( $value, $user, $fieldName ) {
$defaultKeys = [
\'rcp_user_first\' => \'\',
\'rcp_user_last\' => \'\',
\'rcp_user_location\' => \'\',
\'rcp_postal_address\' => \'\'
];
// filter the value so that we get only our specific keys that we want to update
$valueArray = array_filter( array_merge( $defaultKeys, array_intersect_key( $value, $defaultKeys ) ) );
$updateArray = [];
foreach($valueArray as $key=>$val) {
// Here you can add another validation for values.
$updateArray[$key] = update_user_meta($user->ID, $key, $val);
}
return $updateArray;
}