Hands-On Microservices with Rust

Add message

The add_message method adds a message related to a channel and a user to the messages table:

pub fn add_message(&self, channel_id: Id, user_id: Id, text: &str)    -> Result<Message, Error>{    let timestamp = Utc::now().naive_utc();    insert_into(messages::table)        .values((                messages::timestamp.eq(timestamp),                messages::channel_id.eq(channel_id),                messages::user_id.eq(user_id),                messages::text.eq(text),                ))        .returning((                messages::id,                messages::timestamp,                messages::channel_id,                messages::user_id,                messages::text,                ))        .get_result(&self.conn)        .map_err(Error::from)}

The implementation also uses the insert_into function, but we also created the timestamp manually. You can avoid setting this field manually and set a default value to the current timestamp ...