如何在 Drupal 7 中获取特定列

Question

I am trying to fetch one column which is (filename) in my table.

Below is my query:

$query = db_select('network_drive_listing','n');
$query
    ->fields('n', array('filename'))
  ->condition('n.network_drive_id',$id)
  ->condition('n.is_dir',0)
  ->orderBy('n.ndlistid');
    $results = $query->execute();

echo "<pre>".print_r($results)."</pre>"; die;

and my output looks like below:

             DatabaseStatementBase Object ( [dbh] => DatabaseConnection_mysql Object ( [needsCleanup:protected] => [target:protected] => default [key:protected] => default [logger:protected] => [transactionLayers:protected] => Array ( ) [driverClasses:protected] => Array ( [SelectQuery] => SelectQuery [InsertQuery] => InsertQuery_mysql [DatabaseSchema] => DatabaseSchema_mysql ) [statementClass:protected] => DatabaseStatementBase [transactionSupport:protected] => 1 [

I am trying to get one specific column, what am I doing wrong?

Answer 1

You need to call a fetch method onto your result object. Ie.:

$results = $query->execute()->fetchField();

Please have a read on these too:

• function db_select

• Result sets