DboSource::field PHP Method

    public function field($name, $sql)
    {
        $data = $this->fetchRow($sql);
        if (empty($data[$name])) {
            return false;
        }
        return $data[$name];
    }

 /**
  * testRealQueries method
  *
  * @return void
  */
 public function testRealQueries()
 {
     $this->loadFixtures('Apple', 'Article', 'User', 'Comment', 'Tag', 'Sample', 'ArticlesTag');
     $Apple = ClassRegistry::init('Apple');
     $Article = ClassRegistry::init('Article');
     $result = $this->Dbo->rawQuery('SELECT color, name FROM ' . $this->Dbo->fullTableName('apples'));
     $this->assertTrue(!empty($result));
     $result = $this->Dbo->fetchRow($result);
     $expected = array($this->Dbo->fullTableName('apples', false, false) => array('color' => 'Red 1', 'name' => 'Red Apple 1'));
     $this->assertEquals($expected, $result);
     $result = $this->Dbo->fetchAll('SELECT name FROM ' . $this->Dbo->fullTableName('apples') . ' ORDER BY id');
     $expected = array(array($this->Dbo->fullTableName('apples', false, false) => array('name' => 'Red Apple 1')), array($this->Dbo->fullTableName('apples', false, false) => array('name' => 'Bright Red Apple')), array($this->Dbo->fullTableName('apples', false, false) => array('name' => 'green blue')), array($this->Dbo->fullTableName('apples', false, false) => array('name' => 'Test Name')), array($this->Dbo->fullTableName('apples', false, false) => array('name' => 'Blue Green')), array($this->Dbo->fullTableName('apples', false, false) => array('name' => 'My new apple')), array($this->Dbo->fullTableName('apples', false, false) => array('name' => 'Some odd color')));
     $this->assertEquals($expected, $result);
     $result = $this->Dbo->field($this->Dbo->fullTableName('apples', false, false), 'SELECT color, name FROM ' . $this->Dbo->fullTableName('apples') . ' ORDER BY id');
     $expected = array('color' => 'Red 1', 'name' => 'Red Apple 1');
     $this->assertEquals($expected, $result);
     $Apple->unbindModel(array(), false);
     $result = $this->Dbo->read($Apple, array('fields' => array($Apple->escapeField('name')), 'conditions' => null, 'recursive' => -1));
     $expected = array(array('Apple' => array('name' => 'Red Apple 1')), array('Apple' => array('name' => 'Bright Red Apple')), array('Apple' => array('name' => 'green blue')), array('Apple' => array('name' => 'Test Name')), array('Apple' => array('name' => 'Blue Green')), array('Apple' => array('name' => 'My new apple')), array('Apple' => array('name' => 'Some odd color')));
     $this->assertEquals($expected, $result);
     $result = $this->Dbo->read($Article, array('fields' => array('id', 'user_id', 'title'), 'conditions' => null, 'recursive' => 1));
     $this->assertTrue(Set::matches('/Article[id=1]', $result));
     $this->assertTrue(Set::matches('/Comment[id=1]', $result));
     $this->assertTrue(Set::matches('/Comment[id=2]', $result));
     $this->assertFalse(Set::matches('/Comment[id=10]', $result));
 }