Drupal example source code file (views_handler_filter_boolean_operator_string.inc)

This example Drupal source code file (views_handler_filter_boolean_operator_string.inc) is included in the DevDaily.com "Drupal Source Code Warehouse" project. The intent of this project is to help you "Learn Drupal by Example".

PHP - Drupal tags/keywords

class, else, empty, extends, function, if, is, null, php, query, views_handler_filter_boolean_operator_string, where

The views_handler_filter_boolean_operator_string.inc Drupal example source code

<?php
// $Id: views_handler_filter_boolean_operator_string.inc,v 1.2.4.1 2009/11/02 22:01:25 merlinofchaos Exp $
/**
 * Simple filter to handle matching of boolean values.
 *
 * This handler checks to see if a string field is empty (equal to '') or not.
 * It is otherwise identical to the parent operator.
 *
 * Definition items:
 * - label: (REQUIRED) The label for the checkbox.
 */
class views_handler_filter_boolean_operator_string extends views_handler_filter_boolean_operator {
  function query() {
    $this->ensure_my_table();
    $where = "$this->table_alias.$this->real_field ";

    if (empty($this->value)) {
      $where .= "= ''";
      if ($this->accept_null) {
        $where = '(' . $where . " OR $this->table_alias.$this->real_field IS NULL)";
      }
    }
    else {
      $where .= "<> ''";
    }
    $this->query->add_where($this->options['group'], $where);
  }
}