Zend Framework:如何连接两列并仍然使用 fetchPairs()? [英] Zend Framework: How to concatenate two columns and still use fetchPairs()?

问题描述

我有一个带有 select 元素的表单，我需要用数据库中的值填充该元素.具体来说，当前用户的名称和 ID.fetchPairs() 函数非常适合这个！但是，我需要连接 first_name 列和 last_name 列中的值并将其显示为选项标签.有没有办法做到这一点并且仍然使用 fetchPairs()?如果没有，我怎样才能达到同样的结果?以下是当前正在运行的代码的摘录:

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() function works great for this! However, I need to concatenate the value from the first_name column and the last_name column and display this as the option label. Is there a way to do it and still use fetchPairs()? If not, how can I achieve the same result? Here's an excerpt of the code that is currently working:

<?php // excerpt

class Default_Form_AddUser extends Zend_Form
{
    public function init()
    {
        $this->addElement('select', 'user', array(
            'label'      => 'Select user:',
            'required'   => true,
            'multiOptions' => $this->_getSelectOptions()
        ));
    }

    protected function _getSelectOptions()
    {
        $db = Zend_Db_Table::getDefaultAdapter();
        $select = $db->select()->from('users', array('id', 'first_name'));
        $roleOptions = $db->fetchPairs($select);
        return $roleOptions;
    }
}

推荐答案

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);
}

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