Get Line Items in an Invoice logic hook in SuiteCRM - sugarcrm

Question

Via a logic hook I'm trying to update fields of my products, after an invoice has been saved.
What I understand so far is, that I need to get the invoice related AOS_Products_Quotes and from there I could get the products, update the required fields and save the products. Does that sound about right?
The logic hook is being triggered but relationships won't load.
function decrement_stocks ( $bean, $event, $arguments) {
//$bean->product_value_c = $bean->$product_unit_price * $bean->product_qty;
$file = 'custom/modules/AOS_Invoices/decrement.txt';
// Get the Invoice ID:
$sInvoiceID = $bean->id;
$oInvoice = new AOS_Invoices();
$oInvoice->retrieve($sInvoiceID);
$oInvoice->load_relationship('aos_invoices_aos_product_quotes');
$aProductQuotes = $oInvoice->aos_invoices_aos_product_quotes->getBeans();
/*
$aLineItemslist = array();
foreach ($oInvoice->aos_invoices_aos_product_quotes->getBeans() as $lineitem) {
$aLineItemslist[$lineitem->id] = $lineitem;
}
*/
$sBean = var_export($bean, true);
$sInvoice = var_export($oInvoice, true);
$sProductQuotes = var_export($aProductQuotes, true);
$current = $sProductQuotes . "\n\n\n------\n\n\n" . $sInvoice . "\n\n\n------\n\n\n" . $sBean;
file_put_contents($file, $current);
}
The invoice is being retrieved just fine. But either load_relationship isn't doing anything ($sInvoice isn't changing with or without it) and $aProductQuotes is Null.
I'm working on SuiteCRM 7.8.3 and tried it on 7.9.1 as well without success. What am I doing wrong?

Answer 1

I'm not familiar with SuiteCRM specifics, however I'd always suggest to check:
Return value of retrieve(): bean or null?
If null, then no bean with the given ID was found.
In such case $oInvoice would stay empty (Your comment suggests that's not the case here though)
Return value of load_relationship(): true (success) or false (failure, check logs)
And I do wonder, why don't you use $bean?
Instead you seem to receive another copy/reference of $bean (and calling it $oInvoice)? Why?
Or did you mean to receive a different type bean that is somehow connected to $bean?
Then its surely doesn't have the same id as $bean, unless you specifically coded it that way.