我们可以创建一个自定义导出按钮,以在导出项目之前过滤项目列表。
首先我们创建一个GridFieldExportExpiredEventsButton
,它延伸GridFieldExportButton
。这是当前SilverStripe 3.5 generateExportFileData
函数的完整副本,但在$items
列表中添加了filterByCallback
以筛选具有EndDate < date('Y-m-d')
的项目。
class GridFieldExportExpiredEventsButton extends GridFieldExportButton {
public function getHTMLFragments($gridField) {
$button = new GridField_FormAction(
$gridField,
'export',
'Export expired events',
'export',
null
);
$button->setAttribute('data-icon', 'download-csv');
$button->addExtraClass('no-ajax action_export');
$button->setForm($gridField->getForm());
return array(
$this->targetFragment => '<p class="grid-csv-button">' . $button->Field() . '</p>',
);
}
public function generateExportFileData($gridField) {
$separator = $this->csvSeparator;
$csvColumns = $this->getExportColumnsForGridField($gridField);
$fileData = '';
$member = Member::currentUser();
if($this->csvHasHeader) {
$headers = array();
// determine the CSV headers. If a field is callable (e.g. anonymous function) then use the
// source name as the header instead
foreach($csvColumns as $columnSource => $columnHeader) {
$headers[] = (!is_string($columnHeader) && is_callable($columnHeader)) ? $columnSource : $columnHeader;
}
$fileData .= "\"" . implode("\"{$separator}\"", array_values($headers)) . "\"";
$fileData .= "\n";
}
//Remove GridFieldPaginator as we're going to export the entire list.
$gridField->getConfig()->removeComponentsByType('GridFieldPaginator');
$items = $gridField->getManipulatedList();
$items = $items->filterByCallback(function($item) {
// The following line modifies what items are filtered. Change this to change what items are filtered
return $item->EndDate < date('Y-m-d');
});
// @todo should GridFieldComponents change behaviour based on whether others are available in the config?
foreach($gridField->getConfig()->getComponents() as $component){
if($component instanceof GridFieldFilterHeader || $component instanceof GridFieldSortableHeader) {
$items = $component->getManipulatedData($gridField, $items);
}
}
foreach($items->limit(null) as $item) {
if(!$item->hasMethod('canView') || $item->canView($member)) {
$columnData = array();
foreach($csvColumns as $columnSource => $columnHeader) {
if(!is_string($columnHeader) && is_callable($columnHeader)) {
if($item->hasMethod($columnSource)) {
$relObj = $item->{$columnSource}();
} else {
$relObj = $item->relObject($columnSource);
}
$value = $columnHeader($relObj);
} else {
$value = $gridField->getDataFieldValue($item, $columnSource);
if($value === null) {
$value = $gridField->getDataFieldValue($item, $columnHeader);
}
}
$value = str_replace(array("\r", "\n"), "\n", $value);
$columnData[] = '"' . str_replace('"', '""', $value) . '"';
}
$fileData .= implode($separator, $columnData);
$fileData .= "\n";
}
if($item->hasMethod('destroy')) {
$item->destroy();
}
}
return $fileData;
}
}
我们已经将其过滤出口项目的额外行是:
return $item->EndDate < date('Y-m-d');
改变这种改变这种出口的项目清单。我已将此设置为仅返回具有过去的EndDate
的项目。根据需要更改此项。
我们再加入这个出口按钮,我们的电网领域在我们的事件模型管理:
class EventAdmin extends CatalogPageAdmin {
private static $managed_models = array(
'EventPage'
);
public function getEditForm($id = null, $fields = null) {
$form = parent::getEditForm($id);
if ($this->modelClass == 'EventPage') {
$gridField = $form->Fields()->fieldByName($this->modelClass);
$gridField->getConfig()->removeComponentsByType('GridFieldExportButton');
$gridField->getConfig()->addComponent(new GridFieldExportExpiredEventsButton('buttons-before-left'));
}
return $form;
}
}
所以你想两件事情? CSV导出仅包含您想要的字段,并且只在Gridfield上显示一定数量的“EventPages”?我回答了第一个问题,但让我知道如果我理解正确... –