cakephp field() query error

Question

I am trying to extract the latest id of the table called gal_providers

//get the id of the last gal_provider add.
$order = array("GalProvider.id DESC");
$gal_provider_id = $this->GalProvider->field("id",array("order"=>$order));
$this->data["User"]["username"] = "gal_provider_".$gal_provider_id;

But it shows error like :

Warning (512): SQL Error: 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order = ('GalProvider.id DESC') LIMIT 1' at line 1 [CORE/cake/libs/model/datasources/dbo_source.php, line 684]

Query: SELECT GalProvider.id FROM gal_providers AS GalProvider WHERE order = ('GalProvider.id DESC') LIMIT 1

Whats wrong with the code ?

Answer 1

try to change this:

$order = array("GalProvider.id DESC");

to this:

$order = array('GalProvider.id' => 'desc');

or try this:

$gal_provider_id = $this->GalProvider->field("id",array('order' => array('GalProvider.id' => 'desc')));

Answer 2

As noted in the CakePHP documentation, the second argument of the Model::field() method is for a condition, and the third is for the order.

Also looking at the documentation, we can see that by default the condition and order arguments are null - which means we can do the same.

Try this:

$gal_provider_id = $this->GalProvider->field("id", null, "id DESC");
$this->data["User"]["username"] = "gal_provider_".$gal_provider_id;

In your example, you're using the Model::field() method as if it were the Model::find() method (they are two different methods and require different formats for their arguments)

Alternatively, we can use the find method itself:

$gal_provider = $this->GalProvider->find('first', array(
    'fields' => array('GalProvider.id'),
    'order' => 'GalProvider.id DESC',
    'recursive' => -1 // more efficient (ensures no joins made for the query)
));
$this->data["User"]["username"] = "gal_provider_".$gal_provider['GalProvider']['id'];