Should i use belongsTo or hasOne in Laravel?

Question

Consider two models A and B

A -> relatedTo B is a one to one relationship

What is the differ

Answer 1

No, the difference depends on where your foreign key is.

In your example, if A has a b_id column, then A belongsTo B.

If B has an a_id column, then A hasOne or hasMany B depending on how many B should have.