映射实体的 SonataAdminBundle Exporter 问题 [英] SonataAdminBundle Exporter issue with mapped entities

问题描述

sonata-admin-bundle 中有一个标准功能可以使用 exporter 导出数据；但是如何导出当前实体并用它映射多对一实体呢?

There is a standard feature in sonata-admin-bundle to export data using exporter; But how to make export current entity AND mapped ManyToOne entity with it?

基本上我想要的是下载与 ListFields 中定义的完全相同的数据.

Basically what I want, is to download exactly same data as defined in ListFields.

UPD:在 docs 中，只有待办事项

UPD: In docs, there is only todo

UPD2:我找到了一种解决方案，但我认为它不是最好的:

UPD2: I've found one solution, but I do not think it is the best one:

/**
 * Add some fields from mapped entities; the simplest way;
 * @return array
 */
public function getExportFields() {
    $fieldsArray = $this->getModelManager()->getExportFields($this->getClass());

    //here we add some magic :)
    $fieldsArray[] = 'user.superData';
    $fieldsArray[] = 'user.megaData';

    return $fieldsArray;
}

推荐答案

我创建了自己的源迭代器，继承自 DoctrineORMQuerySourceIterator.

I created own source iterator inherited from DoctrineORMQuerySourceIterator.

如果方法 getValue 中的值是数组或 Traversable 实例，我调用方法 getValue 递归来获取每个多"实体的值:

If value in method getValue is array or instance of Traversable i call method getValue recursive to get value for each "Many" entity:

protected function getValue($value)
{
    //if value is array or collection, creates string 
    if (is_array($value) or $value instanceof Traversable) {
        $result = [];
        foreach ($value as $item) {
           $result[] = $this->getValue($item);
        }
        $value = implode(',', $result);
    //formated datetime output    
    } elseif ($value instanceof DateTime) {
        $value = $this->dateFormater->format($value);
    } elseif (is_object($value)) {
        $value = (string) $value;
    }

    return $value;
}

在您的管理类中，您必须重写方法 getDataSourceIterator 以返回您自己的迭代器.

In your admin class you must override method getDataSourceIterator to return your own iterator.

这个

$this->getModelManager()->getExportFields($this->getClass());

返回所有实体项.更好的做法是在 getExportFields() 方法中创建明确的导出项目列表

returns all entity items. Better practice is to create explicit list of exported items in method getExportFields()

public function getExportFields()
{       
    return [
        $this->getTranslator()->trans('item1_label_text') => 'entityItem1', 
        $this->getTranslator()->trans('item2_label_text') => 'entityItem2.subItem', 
        //subItem after dot is specific value from related entity
....

数组中的key用于导出表头(这里是翻译的).

Key in array is used for export table headers (here is traslated).

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