I read many posts and articles but still didn't find a solution.
I would like to filter my product collection with this condition:
... WHERE ('supplier_id' = 1 AND 'product_type' = 'first_type') OR ('supplier_id' = 2 AND 'product_type' = 'another_type') ...
Is it possible to achieve this using addFieldToFilter method?
Any other suggestions are welcome as well!