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我試圖爲Drupal 7.x創建一個模塊。在某個時候,我想使用一個SQL查詢(JOIN)。當我在MYSQL中嘗試查詢時,它起作用。但是當我想在Drupal中嘗試它時,數組是空的。JOIN在SQL中不在Drupal中工作
所以我猜sql查詢和drupal查詢之間有區別(mayby的實現是不同的)。
SQL查詢
SELECT * FROM friends
INNER JOIN users
ON friends.uid=users.uid
Drupal的實施
function project_myfriends(){
// Use database API to retrieve tasks
$query = db_select('friends', 'f');
$query->join('users', 'u', 'f.uid = u.uid'); // JOIN
$query->fields('u', array('name'))
->execute();
return $query;
}
/**
* Implements hook_block_view().
*/
function project_block_view($delta = ''){
switch ($delta) {
case 'project':
$block['subject'] = t('My Friends');
// Use our custom function to retrieve data
$result = project_myfriends();
$items = array();
var_dump($result);
foreach($result as $friend){
$items[] = array(
'data' => $friend->name,
);
}
// No tasks
if (empty($items)) {
$block['content'] = t('No friends.');
}
else {
// Pass data trough theme function
$block['content'] = theme('item_list', array(
'items' => $items));
}
}
return $block;
}
THX提前