crm.fsf.org/20131203/files/sites/all/modules-new/views/modules/field/views_handler_relationship_entity_reverse.inc

   1 <?php
   2
   3 /**
   4  * @file
   5  * Definition of views_handler_relationship_entity_reverse.
   6  */
   7
   8 /**
   9  * A relationship handlers which reverse entity references.
  10  *
  11  * @ingroup views_relationship_handlers
  12  */
  13 class views_handler_relationship_entity_reverse extends views_handler_relationship  {
  14   function init(&$view, &$options) {
  15     parent::init($view, $options);
  16
  17     $this->field_info = field_info_field($this->definition['field_name']);
  18   }
  19
  20   /**
  21    * Called to implement a relationship in a query.
  22    */
  23   function query() {
  24     $this->ensure_my_table();
  25     // First, relate our base table to the current base table to the
  26     // field, using the base table's id field to the field's column.
  27     $views_data = views_fetch_data($this->table);
  28     $left_field = $views_data['table']['base']['field'];
  29
  30     $first = array(
  31       'left_table' => $this->table_alias,
  32       'left_field' => $left_field,
  33       'table' => $this->definition['field table'],
  34       'field' => $this->definition['field field'],
  35     );
  36     if (!empty($this->options['required'])) {
  37       $first['type'] = 'INNER';
  38     }
  39
  40     if (!empty($this->definition['join_extra'])) {
  41       $first['extra'] = $this->definition['join_extra'];
  42     }
  43
  44     if (!empty($this->definition['join_handler']) && class_exists($this->definition['join_handler'])) {
  45       $first_join = new $this->definition['join_handler'];
  46     }
  47     else {
  48       $first_join = new views_join();
  49     }
  50     $first_join->definition = $first;
  51     $first_join->construct();
  52     $first_join->adjusted = TRUE;
  53
  54     $this->first_alias = $this->query->add_table($this->definition['field table'], $this->relationship, $first_join);
  55
  56     // Second, relate the field table to the entity specified using
  57     // the entity id on the field table and the entity's id field.
  58     $second = array(
  59       'left_table' => $this->first_alias,
  60       'left_field' => 'entity_id',
  61       'table' => $this->definition['base'],
  62       'field' => $this->definition['base field'],
  63     );
  64
  65     if (!empty($this->options['required'])) {
  66       $second['type'] = 'INNER';
  67     }
  68
  69     if (!empty($this->definition['join_handler']) && class_exists($this->definition['join_handler'])) {
  70       $second_join = new $this->definition['join_handler'];
  71     }
  72     else {
  73       $second_join = new views_join();
  74     }
  75     $second_join->definition = $second;
  76     $second_join->construct();
  77     $second_join->adjusted = TRUE;
  78
  79     // use a short alias for this:
  80     $alias = $this->definition['field_name'] . '_' . $this->table;
  81
  82     $this->alias = $this->query->add_relationship($alias, $second_join, $this->definition['base'], $this->relationship);
  83   }
  84 }