views_handler_relationship_entity_reverse.inc

<?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);
    }

}