Hands-On Microservices with Rust

Create channel

The next method is create_channel, which creates a new channel for a user. Take a look at the implementation:

pub fn create_channel(&self, user_id: Id, title: &str, is_public: bool)    -> Result<Channel, Error>{    self.conn.transaction::<_, _, _>(|| {        let channel: Channel = insert_into(channels::table)            .values((                    channels::user_id.eq(user_id),                    channels::title.eq(title),                    channels::is_public.eq(is_public),                    ))            .returning((                    channels::id,                    channels::user_id,                    channels::title,                    channels::is_public,                    channels::created_at,                    channels::updated_at,                    ))            .get_result(&self.conn)            .map_err(Error::from)?;        self.add_member(channel.id, user_id)?;        Ok(channel)    })}

The function expects user_id, the title of a channel, and the is_public flag, which means the ...