Drupal apachesolr 的原設定是不會 將 textarea 的文字作為 index 的一部份傳到 solr 的
只會將 body 和 teaser 傳到 solr
原因是 textarea 的 fulltext search 需要 index 的機會很少
但也做成另一個問題, 就是返回 search result 的時候
如果顯示結果需要其中一個 textarea
便會需要一個 node_load()
同樣的情況也出現在 filefield
我的 search result 需要顯示圖片
但我不想每一次都 node_load 一下
而額外增加 index 的語法在 README.txt 也有清楚說明
hook_apachesolr_cck_fields_alter(&$mappings)
Add or alter index mappings for CCK types. The default mappings array handles just
text fields with option widgets:
為 cck 類增加或修改 index mapping. 預設只對使用 options 的 text 有 mapping:
$mappings['text'] = array(
'optionwidgets_select' => array('callback' => '', 'index_type' => 'string'),
'optionwidgets_buttons' => array('callback' => '', 'index_type' => 'string')
);
In your _alter hook implementation you can add additional field types such as:
你可以曾加自定的 field type:
$mappings['number_integer']['number'] = array('callback' => '', 'index_type' => 'integer');
You can also add a mapping for a specific field. This will take precedence over any
mapping for a general field type. A field-specific mapping would look like:
也可以對特定的 field 做 mapping:
$mappings['per-field']['field_model_name'] = array('callback' => '', 'index_type' => 'string');
or
$mappings['per-field']['field_model_price'] = array('callback' => '', 'index_type' => 'float');我便只對特定的 field (一個 textarea 和 imagefield) 加 mapping:
<?php
/**
* Drupal default do not index images and textarea, add them to index too for search result display
**/
function ge_search_apachesolr_cck_fields_alter(&$mappings)
{
$mappings['per-field']['field_main_image'] = array(
'index_type' => 'string',
'callback' => 'ge_search_apachesolr_field_main_image_callback'
);
$mappings['per-field']['field_specialities'] = array(
'index_type' => 'string',
'callback' => 'ge_search_apachesolr_field_specialities_callback'
);
}
function ge_search_apachesolr_field_main_image_callback($node, $fieldname)
{
$fields = array();
foreach($node->$fieldname as $field) {
$fields[] = array('value' => $field['filepath']);
}
return $fields;
}
function ge_search_apachesolr_field_specialities_callback($node, $fieldname)
{
$fields = array();
foreach($node->$fieldname as $field) {
$fields[] = array('value' => $field['value']);
}
return $fields;
}
?>留意我是將 imagefield 的 filepath 傳到 solr
原因是返回的 search result 只需要 filepath 便夠了,
也可以方便使用 theme('imagecache') 之類進行輸出圖片
ref: http://www.acquia.com/blog/understanding-apachesolr-cck-api
