Hands-On Microservices with Rust

Database schema and models

Comments will be stored in a comments table that has three fields: the id of a comment, the uid of a user, and the text of a comment:

mod schema {    table! {        comments {            id -> Nullable<Integer>,            uid -> Text,            text -> Text,        }    }}

The Comment struct has the following declaration:

#[table_name="comments"]#[derive(Serialize, Queryable, Insertable, Debug, Clone)]pub struct Comment {    pub id: Option<i32>,    pub uid: String,    pub text: String,}

We repeated the same field in the Comment struct and added the NewComment struct without id:

#[derive(FromForm)]pub struct NewComment {    pub uid: String,    pub text: String,}

And now for something new—we derive the FormForm type for the NewComment struct. It helps Rocket convert a query into ...