Creating a relation between User.current() data and a Class

[InterstellarX]

Hi Parse Community,

New member here! I am building with NEXTjs w/ TypeScript — I want to be able to leverage the relational database query method so that a User.current() (current user) would be able to track actions they do.

Think like a to-do list…so:

• each user would be able to track the status of their own To-Dos, and when they are checked-off, it would update their own ToDos in the to-do list class.
• when a user wants to see their completed to-dos, it will query their OWN to-do’s, not the entire Class

I believe this is a relation but is it a pointer? I am curious how to create relationships between a current user’s data and a data field.

Any clarity on this would be awesome!!
Best,
Brian

[davimacedo]

Pointer is used for one-to-many relationship while Relation is used for many-to-many. If each user has multiple todos and each todo belongs to a single user, it is a one-to-many that you need. So I’d go with a Pointer field in the Todo Class pointing out to the User class. In the case that a single Todo can be associated to multiple user, you need to go with relation or create your own joint class.

[InterstellarX]

Thanks @davimacedo ! Is this close to what you think it would look like? What I’m struggling to understand is what is a Pointer and what is a Relation given the association of each user to their respective objects (Todos).

I created a diagram to illustrate what I’m thinking of with 3 goals:

• Goal: Bob or Sarah can query their OWN “list of Todos”
• Goal: Each Todo is ownable by ONLY one user
• Goal: Each user can create many ToDos

Could you help me understand more of what is the relation and what is the pointer?

[davimacedo]

I’d only create the Pointer in the Todo class and not the Relation in the User class. You can do all queries you need only using the Pointer.