Zend Framework: How to concatenate two columns and still use fetchPairs()?

Question

I have a form with a select element that I need to populate with values from a database. Specifically, the name and id of the current users. The fetchPairs() functi

Answer 1

protected function _getSelectOptions()
{
    $db     = Zend_Db_Table::getDefaultAdapter();
    $select = $db->select()->from('users', array(
        'id',
        'name' => new Zend_Db_Expr("CONCAT(first_name, ' ', lastname)"),
    ));

    return $db->fetchPairs($select);
}

Answer 2

This is only an idea, and fully untested, but you could try to use a Zend_Db_Expr:

$db = Zend_Db_Table::getDefaultAdapter();
$select = $db->select()->from(
   'users', 
    array('id', "CONCAT_WS(' ', first_name, last_name")
);
$roleOptions = $db->fetchPairs($select);
return $roleOptions;

From the Zend_Db documentation:

Example 15.55. Examples of specifying columns containing expressions

An expression with parentheses implicitly becomes a Zend_Db_Expr.