How to save multiple value in one attribute

hallo, iam new in mendix and i have some issue,   i have two entity named, student and courses, the logic is, one student can add one or manny courses how to make it posible ? i have no idea to make it this is my domain model
1 answers

I would highly recommend following a few learning paths in the Academy to get used to domain models and how to set them up. In this case you could make the association a many-to-many association so a course can have many students and a student can have many courses, however, in most cases best practice is to set up an entity in between. You could call it something like “Registration” and have a many-to-one with Student and a many-to-one with Course.