Django - One to Many relationship

Question

I have user and user role models. There are 3 user roles as teacher, student, admin. One user should have only one role but if I make one-to-one relationship only one user can be attached to one role. I want there can be many students, many teacher, many admins but one user must only have one role. I couldn't figure out how to design this relationship.

I have 2 models as User and User_Role.

class role(models.Model):
   role_name = models.CharField(max_length=64)

class user(models.Model):
   name = models.CharField(max_length=64)

Answer 1

You should define a ForeignKey from the User model to the Role, so:

class Role(models.Model):
    role_name = models.CharField(max_length=64)

class User(models.Model):
    name = models.CharField(max_length=64)
    role = models.ForeignKey(Role, on_delete=models.PROTECT)

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Note: Models in Django are written in PascalCase, not snake_case, so you might want to rename the model from user to User.