Provide a form for setting options.
Overrides PluginBase::buildOptionsForm
public function buildOptionsForm(&$form, &$form_state) {
parent::buildOptionsForm($form, $form_state);
if (isset($this->base_table)) {
$executable = $form_state['view']
->get('executable');
// A whole bunch of code to figure out what relationships are valid for
// this item.
$relationships = $executable->display_handler
->getOption('relationships');
$relationship_options = array();
foreach ($relationships as $relationship) {
$relationship_handler = views_get_handler($relationship['table'], $relationship['field'], 'relationship');
// If this relationship is valid for this type, add it to the list.
$data = views_fetch_data($relationship['table']);
$base = $data[$relationship['field']]['relationship']['base'];
if ($base == $this->base_table) {
$relationship_handler
->init($executable, $relationship);
$relationship_options[$relationship['id']] = $relationship_handler
->label();
}
}
if (!empty($relationship_options)) {
$relationship_options = array_merge(array(
'none' => t('Do not use a relationship'),
), $relationship_options);
$rel = empty($this->options['relationship']) ? 'none' : $this->options['relationship'];
if (empty($relationship_options[$rel])) {
// Pick the first relationship.
$rel = key($relationship_options);
}
$form['relationship'] = array(
'#type' => 'select',
'#title' => t('Relationship'),
'#options' => $relationship_options,
'#default_value' => $rel,
);
}
else {
$form['relationship'] = array(
'#type' => 'value',
'#value' => 'none',
);
}
}
}