[wp-trac] [WordPress Trac] #16841: Manually created user roles not showing in author dropdown regardless of assigned capabilities

[WordPress Trac]

#16841: Manually created user roles not showing in author dropdown regardless of
assigned capabilities
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 Reporter:  10sexyapples                  |       Owner:  swissspidy
     Type:  defect (bug)                  |      Status:  assigned
 Priority:  normal                        |   Milestone:  5.1
Component:  Role/Capability               |     Version:  3.1
 Severity:  normal                        |  Resolution:
 Keywords:  needs-patch needs-unit-tests  |     Focuses:
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Comment (by Mte90):

 To fix in your instance you have to run this piece of code and use the
 user role that you want.
 After reading on Slack the problem is that usually usuers created manually
 (instead of registration screen) doesn't have this user_level configured.

 Anyway in case your issue is different you can fix it running this code
 but you have to do it everytime until there is a fix for this problem.

 Also this problem happen in REST API so this fix the problem also in
 Gutenberg.
 {{{
 $blogusers = get_users( 'role=instructor' );
 foreach ( $blogusers as $user ) {
    $user->add_cap('level_1');
 }
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/16841#comment:60>
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