bWanShiTong

Note: Code bellow works ```rs heart_rate::Entity::insert(model) .on_conflict( OnConflict::column(heart_rate::Column::Unix) .do_nothing() .to_owned(), ) .do_nothing() .exec(&pool) .await?; ``` But following doesn't: ```rs heart_rate::Entity::insert(model) .on_conflict( OnConflict::column(heart_rate::Column::Unix) .do_nothing() .to_owned(), ) .exec(&pool) .await?; ```