Implemente vários ganchos em seu módulo personalizado. Substitua modulenamee filternamepor seus nomes reais.
/**
* Implements hook_views_api().
*/
function modulename_views_api() {
return array(
'api' => 2,
'path' => drupal_get_path('module', 'modulename') . '/inc',
);
}
/**
* Implementation of hook_views_handlers() to register all of the basic handlers
* views uses.
*/
function modulename_views_handlers() {
return array(
'info' => array(
// path to handler files
'path' => drupal_get_path('module', 'modulename') . '/inc',
),
'handlers' => array(
// register our custom filter, with the class/file name and parent class
'modulename_handler_filter_filtername' => array(
'parent' => 'views_handler_filter',
),
),
);
}
function modulename_views_data() {
$data = array();
$data['node']['filtername'] = array(
'group' => t('Custom'),
'real field' => 'my_custom_filter_field',
'title' => t('My custom filter'),
'help' => t('Some more detailed description if you need it.'),
'filter' => array(
'handler' => 'modulename_handler_filter_filtername',
),
);
return $data;
}
Cole o seguinte código nesse modulename_handler_filter_filtername.incarquivo. O código que usei para este exemplo cria um conjunto de botões de opção que apresentam anos. Portanto, você pode filtrar os nós por ano criado, usando apenas os anos em que os nós foram criados.
class modulename_handler_filter_filtername extends views_handler_filter {
/**
* Options form subform for setting exposed filter options.
*/
function value_form(&$form, &$form_state) {
parent::value_form($form, $form_state);
// get list of years from database
$query = db_select('node', 'n');
$query->addExpression("FROM_UNIXTIME(n.created, '%Y')", 'year');
if (isset($this->view->filter['type'])) {
$query->condition('n.type', $this->view->filter['type']->value, 'IN');
}
$result = $query->orderBy('year', 'ASC')
->execute()
->fetchAllAssoc('year');
$years = array(
'0' => t('All'),
);
foreach ($result as $k => $v) {
$years[$k] = $k;
}
// create form element with options retrieved from database
$form['value']['year'] = array(
'#type' => 'radios',
'#options' => $years,
'#default_value' => end($years),
);
}
/**
* Alters Views query when filter is used.
*/
function query() {
// make sure base table is included in the query
$this->ensure_my_table();
// retrieve real filter name from view options
// this requires 'real field' filter option to be set (see code above)
$real_field_name = $this->real_field;
// get the value of the submitted filter
$value = $this->view->exposed_data[$real_field_name];
// finally, alter Views query
if (is_numeric($value) && $value != 0) {
/*
Having several custom exposed filters, make sure subsitution patterns
(e.g. :filtername_value below) don't match across different filters.
I spent some time figuring out why all my filters had the same value.
It looks like the query skeleton is built first and then all replacements
are made in bulk. Prefixing value with filter name looks good imo.
*/
$this->query->add_where_expression($this->options['group'],
"FROM_UNIXTIME(node.created, '%Y') = :filtername_value",
array(':filtername_value' => $value));
}
}
}