class content_handler_relationship in Content Construction Kit (CCK) 6.2

@file Handles content relationships and deals properly with multiple values by allowing the views administrator to select deltas.

Hierarchy

• class \content_handler_relationship extends \views_handler_relationship

2 string references to 'content_handler_relationship'

nodereference_field_settings in modules/nodereference/nodereference.module

Implementation of hook_field_settings().

userreference_field_settings in modules/userreference/userreference.module

Implementation of hook_field_settings().

File

includes/views/handlers/content_handler_relationship.inc, line 8

Handles content relationships and deals properly with multiple values by allowing the views administrator to select deltas.

class content_handler_relationship extends views_handler_relationship {
  var $content_field;
  function construct() {
    parent::construct();
    $this->content_field = content_fields($this->definition['content_field_name']);
  }
  function option_definition() {
    $options = parent::option_definition();
    $options['delta'] = array(
      'default' => -1,
    );
    return $options;
  }

  /**
   * Add a delta selector for multiple fields.
   */
  function options_form(&$form, &$form_state) {
    $field = $this->content_field;
    parent::options_form($form, $form_state);

    // Only add the form gadget if the field is multiple.
    if ($field['multiple']) {
      $max_delta = $field['multiple'];

      // 1 means unlimited.
      if ($max_delta == 1) {
        $max_delta = 10;
      }
      $options = array(
        '-1' => t('All'),
      );
      for ($i = 0; $i < $max_delta; $i++) {
        $options[$i] = $i + 1;
      }
      $form['delta'] = array(
        '#type' => 'select',
        '#options' => $options,
        '#default_value' => $this->options['delta'],
        '#title' => t('Delta'),
        '#description' => t('The delta allows you to select which item in a multiple value field to key the relationship off of. Select "1" to use the first item, "2" for the second item, and so on. If you select "All", each item in the field will create a new row, which may appear to cause duplicates.'),
      );
    }
  }
  function ensure_my_table() {
    if (!isset($this->table_alias)) {
      $join = $this
        ->get_join();
      if (!isset($join->extra)) {
        $join->extra = array();
      }
      $delta = isset($this->options['delta']) ? $this->options['delta'] : -1;
      if ($delta != -1) {
        $join->extra[] = array(
          'field' => 'delta',
          'value' => $delta,
          'numeric' => TRUE,
        );
      }
      $this->table_alias = $this->query
        ->add_table($this->table, $this->relationship, $join);
    }
    return $this->table_alias;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
content_handler_relationship::$content_field		property
content_handler_relationship::construct		function
content_handler_relationship::ensure_my_table		function
content_handler_relationship::options_form		function	Add a delta selector for multiple fields.
content_handler_relationship::option_definition		function