I spent all day reading this forum and another blogs with informations that could help me on this same issue. Unsuccessfully. Many colleagues with the same question unanswered. 🙁
Well, someone posted a solution using slug as a key and it worked for me, because I use the same name for slug and sku .
I decided to share, because maybe this can help someone else:
[dynamichidden URL “CF7_get_post_var key=’slug'”]
