php – 如何在Symfony中将实体导出为CSV？

我使用以下代码输出CSV,但是当我运行它时,我得到一个空白屏幕.基本上我的困惑是DoctrineORMQuerySourceIterator,因为我不知道如何正确使用它.我假设我必须列出属性名称????

我正在使用Sonata Exporter：

https://github.com/sonata-project/exporter

<?php

$repository = $this->getDoctrine()->getRepository('MainReferralCaptureBundle:Referral');
$referrals = $repository->createQueryBuilder('r')->select('r.pLastName, r.pFirstName')->getQuery();

// $referrals2 = $referrals->getResult();
// var_dump($referrals2);

$data = array(
    0 => array('name' => 'Jack'),
    1 => array('name' => 'Jill')
);

// Pick a format to export to
$format = 'csv';

// Filename
$filename = 'referral.csv';

// Set Content-Type
$content_type = 'text/csv';

// Location to Export this to
$export_to = 'php://output';

// Data to export
$exporter_source = new \Exporter\Source\DoctrineORMQuerySourceIterator($referrals, array('pLastName, pFirstName'));

// Get an Instance of the Writer
$exporter_writer = '\Exporter\Writer\\' . ucfirst($format) . 'Writer';

$exporter_writer = new $exporter_writer($export_to);

// Set the right headers
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Content-Description: File Transfer');
header('Content-type: ' . $content_type);
header('Content-Disposition: attachment; filename=' . $filename . ';');
header('Expires: 0');
header('Pragma: public');

// Export to the format
\Exporter\Handler::create($exporter_source, $exporter_writer)->export();

解决方法:

DoctrineORMQuerySourceIterator的secound参数是一个属性名称数组,如下所示：

['Column name in the output' => 'fieldName', 'Something' => 'address.street']

正如您在source code中看到的,它实际上使用Property Accessor组件来访问数据(您可以在那里找到更多示例).

如果你想从db导出原始数据,我建议使用PDOStatementSourceIterator或DoctrineDBALConnectionSourceIterator,因为它们更快.前者需要PDOStatement,另一个需要连接,查询和参数数组(您可以在链接的源代码中看到它)作为构造函数参数.

标签：export-to-csv,php,symfony
来源： https://codeday.me/bug/20191006/1858643.html