So here's my dilemma. I've sort of read up on how to design 2-way relationship APIs but I haven't found an answer to my question yet.Say I have 2 entities, one is called 'Event' and the other is called 'Person'. Now, if I want to add a person to an event, I could either choose something like POST events/{event-id}/persons sending the person-id in the body OR I could have something like POST persons/{person-id}/event sending the event-id in the body of the request. Which of these 2 would be most appropriate? I'm using a NoSQL database and I'm maintaining the 2 way relationship using data redundancy, e.i I'm storing all the event IDs for a person as well as the person Ids for an event. 
Designing a POST request for a 2-way relationship in REST
rest;api;api design