use crate::db::{ChannelId, MessageId, UserId};use sea_orm::entity::prelude::*;use time::PrimitiveDateTime; #[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]#[sea_orm(table_name = "channel_messages")]pub struct Model {    #[sea_orm(primary_key)]    pub id: MessageId,    pub channel_id: ChannelId,    pub sender_id: UserId,    pub body: String,    pub sent_at: PrimitiveDateTime,    pub edited_at: Option<PrimitiveDateTime>,    pub nonce: Uuid,    pub reply_to_message_id: Option<MessageId>,} 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::SenderId",        to = "super::user::Column::Id"    )]    Sender,} impl Related<super::channel::Entity> for Entity {    fn to() -> RelationDef {        Relation::Channel.def()    }} impl Related<super::user::Entity> for Entity {    fn to() -> RelationDef {        Relation::Sender.def()    }}