Why related products are not working in joomla/virtuemart?

Question

I am working with joomla 2.5 and virtuemart 2.0. When I tried to add related products it searched and showed many products but clicking on it doesn't saved any products as related. I checked table

 #__virtuemart_product_relations 

but it doesn't have any record, however I added some rows to it with product ids but still it didn't worked!

Answer 1

I solved it myself exploring all joomla virtuemart tables. I'm posting answer here may be it can help others. Actually the table to store related products is

#__virtuemart_product_customfields.

If you are not able to add related products from joomla administrator then insert rows to this table. You need to add only 3 fields ie

1.virtuemart_product_id (enter here id of the product related for)

2.virtuemart_custom_id (enter here 1)

3.custom_value (product id of the related product).