Cascade Delete in Gorm does not remove Associated Tables

Im new to Gorm. Im trying to do a cascade delete whereby if I delete a User, the Role (Belongs To), Profile (Has One) and Books (One-to-Many) which are associated with the User will be deleted as well.

I set up my model below but cascading can't seem to work. When I delete my User, the Role, Profile and Books still remain in the database rather than being deleted / soft deleted.

Can someone point me to where I did wrong? Thanks

User Model

type User struct {
    gorm.Model
    Name string `json:"name"`
    Age uint    `json:"age"`
    Profile Profile `gorm:"constraint:OnDelete:CASCADE;"`
    RoleID int `json:"role_id"`
    Role Role `gorm:"constraint:OnDelete:CASCADE;"`
    Books []Book `gorm:"constraint:OnDelete:CASCADE;"`
}

type Book struct {
    gorm.Model
    Title string `json:"title"`
    UserID uint `json:"user_id"`
}

type Profile struct {
    gorm.Model
    Country string `json:"country"`
    UserID uint `json:"user_id"`
}

type Role struct {
    ID int
    Name string `json:"name"`
}