[TYPO3-shop] additional fields

[P. Arentzen]

Hello,

as I got no answer in German tt_products forum, I now start a try in 
this list:


Because I need some extra fields for a bookshop, I started writing an 
extension based on tt_products.

As I do not like code changes in other extension I'm searching for a way 
to show the content of these newly created fields by using template markers.

But the only hook I found is called in 
tx_ttproducts_marker::getGlobalMarkers, but at this point there is no 
relation to the product to show.

It would be kind, if somebody can give me a tip or just a hint where to 
start.

To make it clear here's my example

Name of extension:            user_bookshop
field name in table products: user_bookshop_isbn

So I assumed marker name should be ###PRODUCT_USER_BOOKSHOP_ISBN###, 
which I did not got to work.

I'm using tt_products 2.5.6.

I'm not really experienced in TYPO3 (a few month), but in PHP and SQL 
and Joomla, for which I wrote some project specific extensions.


Thanks in advance for your help.

Petra Arentzen