Magento module add rows to totals in pdf invoice - magento

Question

I'm trying to write module for add item to row totals in pdf invoice. This is my modules config.xml:
<?xml version="1.0"?>
<config>
<modules>
<Devpassion_Rowtotal>
<version>0.0.1</version>
</Devpassion_Rowtotal>
</modules>
<global>
<pdf>
<totals>
<rowtotal translate="title">
<title>Subtotal less discount</title>
<source_field>rowtotal</source_field>
<model>rowtotal_pdf_model_totalpdf</model>
<font_size>7</font_size>
<display_zero>1</display_zero>
<sort_order>200</sort_order>
</rowtotal>
</totals>
</pdf>
And this is my model class:
class Devpassion_Rowtotal_Pdf_Model_Totalpdf extends Mage_Sales_Model_Order_Pdf_Total_Default {
public function getTotalsForDisplay () {
$order = $this->getOrder();
$item = $this->getItem();
$subtotaldisc = $item->getRowTotal() + $item->getTaxAmount() + $item->getHiddenTaxAmount() ; - $item->getDiscountAmount();
$result = $order->formatPriceTxt($subtotaldisc) ;
$totals = array(array(
'label' => 'Cijena sa popustom',
'amount' => $result,
'font_size' => $fontSize,
)
);
return $totals;
}
}
And nothing shows up on pdf invoice. Can anybody advice please what can be wrong here. Thanks.

Answer 1

I solved my problem, after I looked at my code, there is some mistakes. But my problem is not like yours.
I noticed that you have incorrect code in your config.xml and also in your model class. Try this.
config.xml
<global>
<pdf>
<totals>
<rowtotal translate="title">
<title>Subtotal less discount</title>
<source_field>rowtotal</source_field>
<model>Devpassion_Rowtotal_Pdf_Model_Totalpdf</model>
<font_size>7</font_size>
<display_zero>1</display_zero>
<sort_order>200</sort_order>
</rowtotal>
</totals>
</pdf>
</global>
Model class, Totalpdf.php
class Devpassion_Rowtotal_Pdf_Model_Totalpdf extends Mage_Sales_Model_Order_Pdf_Total_Default {
public function getTotalsForDisplay() {
$order = $this->getOrder();
$item = $this->getItem();
$subtotaldisc = $item->getRowTotal() + $item->getTaxAmount() + $item->getHiddenTaxAmount() - $item->getDiscountAmount();
$result = $order->formatPriceTxt($subtotaldisc);
if($this->getAmountPrefix()){
$result= $this->getAmountPrefix().$result;
}
$fontSize = $this->getFontSize() ? $this->getFontSize() : 7;
$totals = array(array(
'label' => 'Cijena sa popustom:',
'amount' => $result,
'font_size' => $fontSize,
)
);
return $totals;
}
}

Answer 2

I have tried the above code, it doesn't get the value of $item. I have get the subtotal value and discount value from $order object and it worked.
$order = $this->getOrder ();
$subtotaldisc = $order ['subtotal'] + $order ['discount_amount']; //discount amount returns negative value, so add
$result = $order->formatPriceTxt ( $subtotaldisc );
$fontSize = $this->getFontSize () ? $this->getFontSize () : 10;
$totals = array (
array (
'label' => 'Subtotal with Discount',
'amount' => $result,
'font_size' => $fontSize
)
);
return $totals;

Answer 3

I follow #Wakanina answer and change config.xml - path to pdf mode:
<pdf>
<totals>
<rowtotalbezpdv translate="title">
<title>Ukupno s popustom</title>
<source_field>rowtot_alamount</source_field>
<model>Devpassion_Rowtotalbezpdv_Model_Pdf_Total_Totalbezpdf</model>
<font_size>7</font_size>
<display_zero>0</display_zero>
<sort_order>300</sort_order>
</rowtotalbezpdv>
</totals>
</pdf>
And totalpdf Model class:
class Devpassion_Rowtotalbezpdv_Model_Pdf_Total_Totalbezpdf extends Mage_Sales_Model_Order_Pdf_Total_Default
{
public function getTotalsForDisplay(){
$amount = $this->getAmount();
$fontSize = $this->getFontSize() ? $this->getFontSize() : 7;
if(floatval($amount)){
$amount = $this->getOrder()->formatPriceTxt($amount);
$totals = array(
array(
'label' => 'Cijena knjige/a s popustom bez PDV-a',
'amount' => $amount,
'font_size' => $fontSize,
)
);
return $totals;
}
}
public function getAmount(){
$order = $this->getOrder();
$subtotaldiscnopdv = 0;
foreach ($order->getAllItems() as $item) {
$subtotaldiscnopdv += $item->getRowTotal() - $item->getDiscountAmount();
}
return $subtotaldiscnopdv;
}
}
This helps me out and solve my issue.