use crate::db::{ChannelRole, ProjectId, RoomId, RoomParticipantId, ServerId, UserId};use rpc::ConnectionId;use sea_orm::entity::prelude::*; #[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]#[sea_orm(table_name = "room_participants")]pub struct Model {    #[sea_orm(primary_key)]    pub id: RoomParticipantId,    pub room_id: RoomId,    pub user_id: UserId,    pub answering_connection_id: Option<i32>,    pub answering_connection_server_id: Option<ServerId>,    pub answering_connection_lost: bool,    pub location_kind: Option<i32>,    pub location_project_id: Option<ProjectId>,    pub initial_project_id: Option<ProjectId>,    pub calling_user_id: UserId,    pub calling_connection_id: i32,    pub calling_connection_server_id: Option<ServerId>,    pub participant_index: Option<i32>,    pub role: Option<ChannelRole>,} impl Model {    pub fn answering_connection(&self) -> Option<ConnectionId> {        Some(ConnectionId {            owner_id: self.answering_connection_server_id?.0 as u32,            id: self.answering_connection_id? as u32,        })    }} #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]pub enum Relation {    #[sea_orm(        belongs_to = "super::user::Entity",        from = "Column::UserId",        to = "super::user::Column::Id"    )]    User,    #[sea_orm(        belongs_to = "super::room::Entity",        from = "Column::RoomId",        to = "super::room::Column::Id"    )]    Room,} impl Related<super::user::Entity> for Entity {    fn to() -> RelationDef {        Relation::User.def()    }} impl Related<super::room::Entity> for Entity {    fn to() -> RelationDef {        Relation::Room.def()    }} impl ActiveModelBehavior for ActiveModel {}