我想用一个额外的字段扩展默认的Drupal 7节点搜索。
我用以下新字段修改搜索表单:
function mymodule_form_search_form_alter(&$form, &$form_state, $form_id) {
$form['basic']['site'] = array(
'#type' => 'select',
'#options' => array(
'KEY1' => 'TITLE1',
'KEY2' => 'TITLE2',
'KEY3' => 'TITLE3'
)
);
}
我有一个名为field_data_field_site.field_site_value的字段，我需要在此搜索中用作过滤器。
我试着阅读hook_search_*函数，但没有得到的想法。
以下是我解决这个问题的最佳方法。
首先，我需要用我的字段修改Drupal的搜索块和搜索表单，并定义新的提交函数。
/**
* Implements hook_form_FORM_ID_alter().
*/
function mymodule_form_search_block_form_alter(&$form, &$form_state, $form_id) {
$form['#submit'][] = 'search_form_alter_submit';
$form['site'] = array(
'#type' => 'select',
'#options' => _options(),
'#default_value' => (($_GET['site']) ? $_GET['site'] : '')
);
}
/**
* Implements hook_form_FORM_ID_alter().
*/
function mymodule_form_search_form_alter(&$form, &$form_state, $form_id) {
$form['#submit'][] = 'search_form_alter_submit';
$form['basic']['site'] = array(
'#type' => 'select',
'#options' => _options(),
'#default_value' => (($_GET['site']) ? $_GET['site'] : '')
);
}
function _options() {
return array(
'' => 'Select site',
'site-1' => 'Site 1',
'site-2' => 'Site 2'
);
}
提交功能将把我们转发到默认的search/node页面，但与我们的查询。页面看起来像search/node/Our-query-string?site=Our-option-selected。
function search_form_alter_submit($form, &$form_state) {
$path = $form_state['redirect'];
$options = array(
'query' => array(
'site' => $form_state['values']['site']
)
);
drupal_goto($path, $options);
}
下一步是使用hook_search_info(不要忘记打开它并将其设置为admin/config/search/settings页面的默认值)。
/**
* Implements hook_search_info().
*/
function mymodule_search_info() {
return array(
'title' => 'Content',
'path' => 'node',
'conditions_callback' => '_conditions_callback',
);
}
hook_search_info中定义的条件回调函数。我们需要为我们的搜索提供额外的查询
function _conditions_callback($keys) {
$conditions = array();
if (!empty($_REQUEST['site'])) {
$conditions['site'] = $_REQUEST['site'];
}
return $conditions;
}
最后，hook_search_execute将根据查询过滤我们的内容。我使用了这个钩子的默认代码，并进行了必要的修改。
/**
* Implements hook_search_execute().
*/
function mymodule_search_execute($keys = NULL, $conditions = NULL) {
// Build matching conditions
$query = db_select('search_index', 'i', array('target' => 'slave'))
->extend('SearchQuery')
->extend('PagerDefault');
$query->join('node', 'n', 'n.nid = i.sid');
// Here goes my filter where I joined another table and
// filter by required field
$site = (isset($conditions['site'])) ? $conditions['site'] : NULL;
if ($site) {
$query->leftJoin('field_data_field_site', 's', 's.entity_id = i.sid');
$query->condition('s.field_site_value', $site);
}
// End of my filter
$query
->condition('n.status', 1)
->addTag('node_access')
->searchExpression($keys, 'node');
// Insert special keywords.
$query->setOption('type', 'n.type');
$query->setOption('language', 'n.language');
if ($query->setOption('term', 'ti.tid')) {
$query->join('taxonomy_index', 'ti', 'n.nid = ti.nid');
}
// Only continue if the first pass query matches.
if (!$query->executeFirstPass()) {
return array();
}
// Add the ranking expressions.
_node_rankings($query);
// Load results.
$find = $query
->limit(10)
->execute();
$results = array();
foreach ($find as $item) {
// Build the node body.
$node = node_load($item->sid);
node_build_content($node, 'search_result');
$node->body = drupal_render($node->content);
// Fetch comments for snippet.
$node->rendered .= ' ' . module_invoke('comment', 'node_update_index', $node);
// Fetch terms for snippet.
$node->rendered .= ' ' . module_invoke('taxonomy', 'node_update_index', $node);
$extra = module_invoke_all('node_search_result', $node);
$results[] = array(
'link' => url("node/{$item->sid}", array('absolute' => TRUE)),
'type' => check_plain(node_type_get_name($node)),
'title' => $node->title,
'user' => theme('username', array('account' => $node)),
'date' => $node->changed,
'node' => $node,
'extra' => $extra,
'score' => $item->calculated_score,
'snippet' => search_excerpt($keys, $node->body)
);
}
return $results;
}