function _cer_find_channels in Corresponding Entity References 7.2

The purpose of this function is to answer this question: I am a field instance. Which other fields reference the entity that owns me? And of those instances, which ones can I reference? The answer is returned as an array of CER keys: "entity1 bundle1 field1 entity2 bundle2 field2".

Parameters

array $instance: Field instance info, as returned by field_info_instance().

Return value

array

1 call to _cer_find_channels()

cer_settings_form in ./cer.admin.inc

The settings form.

File

./cer.admin.inc, line 163

Administrative functionality, separated for performance purposes.

Code

function _cer_find_channels($instance) {
  $channels = array();
  $my_id = $instance['entity_type'] . ' ' . $instance['bundle'] . ' ' . $instance['field_name'];
  $my_info = field_info_field($instance['field_name']);
  $my_targets = _cer_get_target_bundles($my_info);
  $my_target_type = $my_info['settings']['target_type'];
  $referrers = _cer_find_referrers($instance['entity_type'], $instance['bundle']);
  foreach ($referrers as $referrer) {
    if (isset($referrer['bundles'][$my_target_type])) {
      if (empty($my_targets)) {
        $bundles = $referrer['bundles'][$my_target_type];
      }
      else {
        $bundles = array_intersect($referrer['bundles'][$my_target_type], $my_targets);
      }
      foreach ($bundles as $bundle) {
        $channels[] = "{$my_id} {$my_target_type} {$bundle} " . $referrer['field_name'];
      }
    }
  }
  return $channels;
}