Drupal 7 Search Extension

Question

I want to extend the default search of Drupal 7 node with one additional field.

I am changing the search form with the following new field:

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' ) ); } 

I have a field called field_data_field_site.field_site_value that I need to use as a filter in this search.

I tried to read about hook_search_* functions, but did not understand.

My question is the following. How to expand the search form? Does anyone have any live examples?

Answer 1

Below is the best way to solve this problem.

First of all, I need to change the Drupal search block and the search form with my field and define a new submit function.

 /** * 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' ); } 

The submit function sends us the default search/node page, but with our request. The page will look like 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); } 

The next step is to use hook_search_info (do not forget to enable it and set it by default on the admin/config/search/settings page).

 /** * Implements hook_search_info(). */ function mymodule_search_info() { return array( 'title' => 'Content', 'path' => 'node', 'conditions_callback' => '_conditions_callback', ); } 

Condition callback function defined in hook_search_info . We must provide additional requests for our search.

 function _conditions_callback($keys) { $conditions = array(); if (!empty($_REQUEST['site'])) { $conditions['site'] = $_REQUEST['site']; } return $conditions; } 

Finally, hook_search_execute will filter our content upon our request. I used the default code from this host with the changes I need.

 /** * 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; } 

I would be glad if someone gives me a better answer.