Magento Multi store products from different root category in same page on website level

Question

I struggled a lot to find a solution for that with Magento CE, but I still don't know how to do it. What I would like to have is a website with multi store on different domains, and this seems to be easy if checking on docs. Then I need on default domain/store to share all products from different root category/stores all together and let the user buy from different stores without have to switch between stores.

I don't know how to achieve this and I can't find any point to figure it out.

It is possible to do it simply with a config of basic Magento or should I have to do it programmatically?

Answer 1

Sorry that I did not respond right away. You can have two stores and two root categories. You just have to make sure the product is assigned to both. This is how the store you checked out is setup. As you can see both stores are part of one website which means they share product. The only gotcha is you have to add products to multiple root categories. You could have them share the same root, however the product display would be identical. Thank you for the compliment as well.

This is the setup of the product with the SKU you referenced.