db/migrations/5.1.11_wiki_ancestor_collation.php


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<?php

class WikiAncestorCollation extends Migration
{
    public function description()
    {
        return 'fix collation for ancestor column in wiki';
    }

    public function up()
    {
        $db = DBManager::get();

        $db->exec('ALTER TABLE wiki CHANGE ancestor ancestor VARCHAR(255) COLLATE utf8mb4_bin DEFAULT NULL');
    }
}