Cascading delete with sqlite isn't working with a join table - go-gorm

Question

If you have a table that's just a hash of a many-to-many relationship between two other tables, like :
type User struct{
UserId string
...
}
type Roles struct{
Level string
...
}
where UserId and Level are PrimaryKeys.
The "join table" was originally:
type User_Role struct{
UserId string
Level string
}
How can you build that in gorm with cascading foreign key relataionships, et al.
I've been trying to piece it together from their docs, and different sources, but when I delete either the user or role, the join table still has the records.
Currently, this is what I've got:
type User_Roles struct {
User_Id string `gorm:"primaryKey; not null;ForeignKey:user_id;references:users.user_id,constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
Level string `gorm:"primaryKey; not null;ForeignKey:level;references:roles.level,constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
}
When I had fields in the struct for User and Role sqlite created the table with every field from both, doing it this way created the table with the right fields, but the cascading isn't working.

Answer 1

Foreign key checks are disabled in SQLite by default, you need to enable them:
db.Exec("PRAGMA foreign_keys = ON")
If you specify the foreign key relations like this, they should work as you'd expect:
type User struct {
UserId string `gorm:"primaryKey;not null;"`
UserRoles []User_Roles `gorm:"foreignKey:UserId;references:UserId;constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
}
type User_Roles struct {
UserId string `gorm:"primaryKey;not null;"`
Level string `gorm:"primaryKey;not null;"`
}
i.e. if you delete a user, its associations will be removed.