MDL-79365 customfield_textarea: ensure field uniqueness is correct.

2023-10-13 14:30:08 +01:00
parent d188d58ce9
commit d160890cab
2 changed files with 29 additions and 3 deletions
@@ -238,7 +238,13 @@ abstract class data_controller {
     */
    protected function is_unique($value) : bool {
        global $DB;
+
+        // Ensure the "value" datafield can be safely compared across all databases.
        $datafield = $this->datafield();
+        if ($datafield === 'value') {
+            $datafield = $DB->sql_cast_to_char($datafield);
+        }
+
        $where = "fieldid = ? AND {$datafield} = ?";
        $params = [$this->get_field()->get('id'), $value];
        if ($this->get('id')) {