Systems for goods with a code?

Question

CMS

Good evening everyone. Guys, who came across such functionality? You need a CMS or something similar to hold a promotion on the site. In general, there is a product in supermarkets. Each product will have a special code printed on it. A person visits the site, opens a page with a form for entering this code from the package. After filling out the form, the code flies to the database. Everything can be done manually, you say. But you need a ready-made solution, since then you need to manage this information in the admin panel. Thanks in advance
PS there is no online store, only offline points. That is, Google has a lot of information specifically for online stores, but nothing simple was found

Answer 1

The root of evil is in all these "ready-made solutions", which then overlap each other (if possible) or crookedly, but screwed on with a bunch of "footnotes": "only here it’s necessary like this, but there it’s not as usual, but like this, and the results due to inconsistencies in versions not in the admin panel, but on a special url, you need to look using the get-crutch ", etc.
In fact, your question was generated precisely for this reason!
There will never (!) be a normal, self-respecting and customer-respecting online store and will not be able to work efficiently on open sources! At first it is possible, but then they will certainly arise (and not just once, but constantly!) such troubles as you have now ...
Personally, I would advise you in the future (and quickly) to think about switching from open source to something custom with a guarantee and constant support! Ideally, this is a full-time coder who could add any module without "haemorrhoids and curses" ...
"All" ready-made solutions for "everything" do not exist, and such "plugging holes" can become a permanent lot, and this will soon lead to serious glitches of the "main CMS"

Answer 2

You need a CMS or something similar to run a promotion on the site. In general, there is a product in supermarkets. Each product will have a special code printed on it. A person visits the site, opens a page with a form for entering this code from the package.

This is called a lottery, which is very tightly controlled by a special state committee. Order it from a specialized organization that has all licenses, equipment and Internet resources. For that "admin panel" you are soldered an article for fraud, for the "input form" - the law on personal data.