use crate::db::{FollowerId, ProjectId, RoomId, ServerId};use rpc::ConnectionId;use sea_orm::entity::prelude::*; #[derive(Clone, Debug, Default, PartialEq, Eq, DeriveEntityModel)]#[sea_orm(table_name = "followers")]pub struct Model {    #[sea_orm(primary_key)]    pub id: FollowerId,    pub room_id: RoomId,    pub project_id: ProjectId,    pub leader_connection_server_id: ServerId,    pub leader_connection_id: i32,    pub follower_connection_server_id: ServerId,    pub follower_connection_id: i32,} impl Model {    pub fn leader_connection(&self) -> ConnectionId {        ConnectionId {            owner_id: self.leader_connection_server_id.0 as u32,            id: self.leader_connection_id as u32,        }    }     pub fn follower_connection(&self) -> ConnectionId {        ConnectionId {            owner_id: self.follower_connection_server_id.0 as u32,            id: self.follower_connection_id as u32,        }    }} #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]pub enum Relation {    #[sea_orm(        belongs_to = "super::room::Entity",        from = "Column::RoomId",        to = "super::room::Column::Id"    )]    Room,} impl Related<super::room::Entity> for Entity {    fn to() -> RelationDef {        Relation::Room.def()    }} impl ActiveModelBehavior for ActiveModel {}