Fix: In millionaire shows the correct number of good multichoice questions

lang/en/game.php

@@ -341,6 +341,7 @@ $string[ 'clearrepetitions'] = 'Clear statistics';
 $string[ 'computerepetitions'] = 'Compute statistics again';
 $string[ 'feedbacks'] = 'Messages correct answer';
 $string[ 'repetitions'] = 'Repetitions';
+$string[ 'millionaire_also_multichoice'] = 'Multichoice answers without single correct answer';
 
 // File showattempts.php.
 $string[ 'lastip'] = 'IP student';

showanswers.php

@@ -52,6 +52,9 @@ echo '<br><br>';
 
 $existsbook = ($DB->get_record( 'modules', array( 'name' => 'book'), 'id,id'));
 game_showanswers( $game, $existsbook, $context);
+if ($game->gamekind == 'millionaire') {
+   game_showanswers_extra_millionaire( $game);
+}
 
 echo $OUTPUT->footer();
 
@@ -224,8 +227,12 @@ function game_showanswers_question( $game, $context) {
     $order = ($showcategories ? 'category,questiontext' : 'questiontext');
     $table = '{question} q';
     if ($game->gamekind == 'millionaire') {
-        $select .= " AND qtype='multichoice' AND qmo.single=1 AND qmo.questionid=q.id";
+        $select .= " AND q.qtype='multichoice' AND qmo.single=1 AND qmo.question=q.id";
-        $table = '{question} q, {qtype_multichoice_options} qmo';
+        if (game_get_moodle_version() < '02.06') {
+            $table .= ',{question_multichoice} qmo';
+        } else {
+            $table .= ',{qtype_multichoice_options} qmo';
+        }
     }
     game_showanswers_question_select( $game, $table, $select, '*', $order, $showcategories, $game->course, $context);
 }
@@ -506,3 +513,34 @@ function game_showanswers_bookquiz( $game, $context) {
     game_showanswers_question_select( $game, $table, $select, "DISTINCT q.*",
         "bc.pagenum,questiontext", $showcategories, $game->course, $context);
 }
+
+function game_showanswers_extra_millionaire( $game)
+{
+    global $CFG, $DB;
+
+    if ($game->questioncategoryid == 0) {
+        print_error( get_string( 'must_select_questioncategory', 'game'));
+    }
+
+    // Include subcategories.
+    $select = 'category='.$game->questioncategoryid;
+    if ($game->subcategories) {
+        $cats = question_categorylist( $game->questioncategoryid);
+        if (count( $cats)) {
+            $select = 'q.category in ('.implode(',', $cats).')';
+        }
+     }
+
+     $select .= " AND qtype='multichoice' AND qmo.single <> 1 AND qmo.question=q.id";
+     if (game_get_moodle_version() < '02.06') {
+        $table = "{$CFG->prefix}question q, {$CFG->prefix}question_multichoice qmo";
+     } else {
+         $table = "{$CFG->prefix}question q, {$CFG->prefix}qtype_multichoice_options qmo";
+     }
+
+     $sql = "SELECT COUNT(*) as c FROM $table WHERE $select";
+     $rec = $DB->get_record_sql( $sql);
+     if ($rec->c != 0) {
+          echo get_string( 'millionaire_also_multichoice', 'game').': '.$rec->c;
+     }
+}