collection not loading in pdf file in magento - php

Question

I have to export data in pdf of orders in Magento
But i got this error:
Fatal error: Call to undefined method Mage_Reports_Model_Resource_Report_Collection::getSelect() in app/code/core/Mage/Adminhtml/Block/Widget/Grid.php on line 1683
my code for getpdf action
public function getPdfFile(){
$this->_isExport = true;
$this->_prepareGrid();
$this->getCollection()->getSelect()->limit();
$this->getCollection()->setPageSize(0);
$this->getCollection()->load();
$this->_afterLoadCollection();
$pdf = new Zend_Pdf();
$page = new Zend_Pdf_Page(Zend_Pdf_Page::SIZE_A4);
$font = Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_TIMES);
$page->setFont($font, 12);
$width = $page->getWidth();
$i=0;
foreach ($this->_columns as $column) {
if (!$column->getIsSystem()) {
$i+=10;
$header = $column->getExportHeader();
$page->drawText($header, $i, $page->getHeight()-20);
$width = $font->widthForGlyph($font->glyphNumberForCharacter($header));
$i+=($width/$font->getUnitsPerEm()*12)*strlen($header)+10;
}
}
$pdf->pages[] = $page;
return $pdf->render();
}
and my controller action code is
public function exportPdfAction(){
$fileName = 'daily_orders.pdf';
$content = $this->getLayout()->createBlock('reportneworders/adminhtml_reportneworders_grid')->getPdfFile();
$this->_prepareDownloadResponse($fileName, $content);
}
grid is working proper in admin.
csv and excel data export sucessfully but pdf cannot. any one please help me.

Answer 1

The foreach ($this->_columns as $column) statement which you have only prints the headers of the grid.
You have to iterate through the collection of items as well. Before the $pdf->pages[] = $page; line, add something like this:
$j = 40;
foreach ($collection as $item) {
// add code here, which is printing $item information
// Example:
$y = $page->getHeight()-$j;
$page->drawText($item->getincrement_id(), 20, $y);
$page->drawText($item->getcreated_at(), 50, $y);
// etc.
$j += 20;
}
Also, in my own code, in order the PDF export to respond to the grid filters, I had to change the function exportPdfAction() code to the following (otherwise filters were ignored):
public function exportPdfAction(){
$fileName = 'daily_orders.pdf';
$grid = $this->getLayout()->createBlock('reportneworders/adminhtml_reportneworders_grid');
$this->_initReportAction($grid);
$content = $grid->getPdfFile();
$this->_prepareDownloadResponse($fileName, $content);
}
As you see, I have added the $this->_initReportAction($grid);