I have some products type , I want when a specify product type is in order add amount to shipping cost.
my idea was create a rule with condition
Order contains products of particular product types ,and select action
add a amount to unit price but in
item identifier *
Specify an identifier of a commerce Line item section I try everything but returned me error.
but all of them return me Data selector commerce-order:commerce-line-items: for parameter commerce_line_item is invalid. error.
what I should input there ? is my idea correct way to add amount to shipping price when specify products are in order?