Here’s a post that could get you started:
http://wordpress.stackexchange.com/questions/128622/creating-a-relationship-between-two-post-types
I had a similar issue with adding “hierarchy” (parent-to-child, 1-to-1) to university courses and programs. I think what might help you to consider “hierarchy” as a form of “relationship.”
From a strategic standpoint, this approach may help you down the road in the event that a single coupon works across multiple stores (say the store has multiple locations or that the coupon could work a various different brands).
I personally used ACF to solve the problem mentioned above, it worked great.
how do you use ACF can you tell me i have been stuck at it for a week and i am not so good in programming.
ohk i have created the relationship how do i add it to the permalink structure
If I remember right, you may need to have WordPress “rebuild” permalinks for it to appear.
It’s real easy to do: Go to Settings > Permalinks and save whatever setting you already are using (unless you want to change something else as well).
On save, WordPress will very quickly rebuild the permalinks. That should add your custom post type to the structure if I remember right.
