use crate::db::{channel_member, ChannelId, ChannelMemberId, ChannelRole, UserId};use sea_orm::entity::prelude::*; #[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]#[sea_orm(table_name = "channel_members")]pub struct Model {    #[sea_orm(primary_key)]    pub id: ChannelMemberId,    pub channel_id: ChannelId,    pub user_id: UserId,    pub accepted: bool,    pub role: ChannelRole,} impl ActiveModelBehavior for ActiveModel {} #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]pub enum Relation {    #[sea_orm(        belongs_to = "super::channel::Entity",        from = "Column::ChannelId",        to = "super::channel::Column::Id"    )]    Channel,    #[sea_orm(        belongs_to = "super::user::Entity",        from = "Column::UserId",        to = "super::user::Column::Id"    )]    User,} impl Related<super::channel::Entity> for Entity {    fn to() -> RelationDef {        Relation::Channel.def()    }} impl Related<super::user::Entity> for Entity {    fn to() -> RelationDef {        Relation::User.def()    }} #[derive(Debug)]pub struct UserToChannel; impl Linked for UserToChannel {    type FromEntity = super::user::Entity;     type ToEntity = super::channel::Entity;     fn link(&self) -> Vec<RelationDef> {        vec![            channel_member::Relation::User.def().rev(),            channel_member::Relation::Channel.def(),        ]    }}