Add new item with property of realation with another collection

[Eventyret]

@SSB2000

Ex. I have categories that may belong to many restaurants and I want to add a restaurant with 2 categories. The the restaurants ID in the respective category will also need updation. How can I achieve this? Is there any prebuilt functionalty in strapi.

You can then pass an array of id's about categories when creating a restaurant. which will add those categories to the resturants.