Fix function name

Author: jmontoyaa

main/inc/lib/extra_field.lib.php

@@ -80,19 +80,23 @@ public function __construct($type)
         $this->table = Database::get_main_table(TABLE_EXTRA_FIELD);
         $this->table_field_options = Database::get_main_table(TABLE_EXTRA_FIELD_OPTIONS);
         $this->table_field_values = Database::get_main_table(TABLE_EXTRA_FIELD_VALUES);
+        $this->handler_id = 'item_id';
 
         switch ($this->type) {
             case 'calendar_event':
                 $this->extraFieldType = EntityExtraField::CALENDAR_FIELD_TYPE;
                 break;
             case 'course':
                 $this->extraFieldType = EntityExtraField::COURSE_FIELD_TYPE;
+                $this->primaryKey = 'id';
                 break;
             case 'user':
                 $this->extraFieldType = EntityExtraField::USER_FIELD_TYPE;
+                $this->primaryKey = 'id';
                 break;
             case 'session':
                 $this->extraFieldType = EntityExtraField::SESSION_FIELD_TYPE;
+                $this->primaryKey = 'id';
                 break;
             case 'question':
                 $this->extraFieldType = EntityExtraField::QUESTION_FIELD_TYPE;
@@ -2126,7 +2130,7 @@ public function getExtraFieldRules($filters, $stringToSearch = 'extra_')
                 if (strpos($rule->field, '_second') === false) {
                     //No _second
                     $original_field = str_replace($stringToSearch, '', $rule->field);
-                    $field_option = $this->get_handler_field_info_by_variable($original_field);
+                    $field_option = $this->get_handler_field_info_by_field_variable($original_field);
 
                     if ($field_option['field_type'] == ExtraField::FIELD_TYPE_DOUBLE_SELECT) {