use crate::db::{ContactId, UserId};use sea_orm::entity::prelude::*; #[derive(Clone, Debug, Default, PartialEq, Eq, DeriveEntityModel)]#[sea_orm(table_name = "contacts")]pub struct Model {    #[sea_orm(primary_key)]    pub id: ContactId,    pub user_id_a: UserId,    pub user_id_b: UserId,    pub a_to_b: bool,    pub should_notify: bool,    pub accepted: bool,} #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]pub enum Relation {    #[sea_orm(        belongs_to = "super::room_participant::Entity",        from = "Column::UserIdA",        to = "super::room_participant::Column::UserId"    )]    UserARoomParticipant,    #[sea_orm(        belongs_to = "super::room_participant::Entity",        from = "Column::UserIdB",        to = "super::room_participant::Column::UserId"    )]    UserBRoomParticipant,} impl ActiveModelBehavior for ActiveModel {}