Club Drupal

<?php

/**

 * @file

 * Definition of views_handler_relationship_entity_reverse.

 */

/**

 * A relationship handlers which reverse entity references.

 *

 * @ingroup views_relationship_handlers

 */

class views_handler_relationship_entity_reverse extends views_handler_relationship {

  /**

   * {@inheritdoc}

   */

  public function init(&$view, &$options) {

    parent::init($view, $options);

    $this->field_info = field_info_field($this->definition['field_name']);

  }

  /**

   * Called to implement a relationship in a query.

   */

  public function query() {

    $this->ensure_my_table();

    // First, relate our base table to the current base table to the

    // field, using the base table's id field to the field's column.

    $views_data = views_fetch_data($this->table);

    $left_field = $views_data['table']['base']['field'];

    $first = array(

      'left_table' => $this->table_alias,

      'left_field' => $left_field,

      'table' => $this->definition['field table'],

      'field' => $this->definition['field field'],

    );

    if (!empty($this->options['required'])) {

      $first['type'] = 'INNER';

    }

    if (!empty($this->definition['join_extra'])) {

      $first['extra'] = $this->definition['join_extra'];

    }

    if (!empty($this->definition['join_handler']) && class_exists($this->definition['join_handler'])) {

      $first_join = new $this->definition['join_handler'];

    }

    else {

      $first_join = new views_join();

    }

    $first_join->definition = $first;

    $first_join->construct();

    $first_join->adjusted = TRUE;

    $this->first_alias = $this->query->add_table($this->definition['field table'], $this->relationship, $first_join);

    // Second, relate the field table to the entity specified using

    // the entity id on the field table and the entity's id field.

    $second = array(

      'left_table' => $this->first_alias,

      'left_field' => 'entity_id',

      'table' => $this->definition['base'],

      'field' => $this->definition['base field'],

    );

    if (!empty($this->options['required'])) {

      $second['type'] = 'INNER';

    }

    if (!empty($this->definition['join_handler']) && class_exists($this->definition['join_handler'])) {

      $second_join = new $this->definition['join_handler'];

    }

    else {

      $second_join = new views_join();

    }

    $second_join->definition = $second;

    $second_join->construct();

    $second_join->adjusted = TRUE;

    // Use a short alias for this.

    $alias = $this->definition['field_name'] . '_' . $this->table;

    $this->alias = $this->query->add_relationship($alias, $second_join, $this->definition['base'], $this->relationship);

  }

}