actix test

.env

@@ -0,0 +1 @@
+DATABASE_URL=postgres://postgres:password@localhost/olh

.gitignore

@@ -1 +1,22 @@
 /target
+/migration/target
+
+# Added by cargo
+#
+# already existing elements were commented out
+
+#/target
+
+
+# Added by cargo
+#
+# already existing elements were commented out
+
+#/target
+
+
+# Added by cargo
+#
+# already existing elements were commented out
+
+#/target

Cargo.toml

@@ -4,3 +4,8 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+actix-web = "4.9.0"
+diesel = { version = "2.2.7", features = ["postgres", "r2d2"] }
+dotenv = "0.15.0"
+serde = { version = "1.0.218", features = ["derive"] }
+serde_json = "1.0.139"

diesel.toml

@@ -0,0 +1,9 @@
+# For documentation on how to configure this file,
+# see https://diesel.rs/guides/configuring-diesel-cli
+
+[print_schema]
+file = "src/schema.rs"
+custom_type_derives = ["diesel::query_builder::QueryId", "Clone"]
+
+[migrations_directory]
+dir = "migrations"

migrations/00000000000000_diesel_initial_setup/down.sql

@@ -0,0 +1,6 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+DROP FUNCTION IF EXISTS diesel_manage_updated_at(_tbl regclass);
+DROP FUNCTION IF EXISTS diesel_set_updated_at();

migrations/00000000000000_diesel_initial_setup/up.sql

@@ -0,0 +1,36 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+
+
+
+-- Sets up a trigger for the given table to automatically set a column called
+-- `updated_at` whenever the row is modified (unless `updated_at` was included
+-- in the modified columns)
+--
+-- # Example
+--
+-- ```sql
+-- CREATE TABLE users (id SERIAL PRIMARY KEY, updated_at TIMESTAMP NOT NULL DEFAULT NOW());
+--
+-- SELECT diesel_manage_updated_at('users');
+-- ```
+CREATE OR REPLACE FUNCTION diesel_manage_updated_at(_tbl regclass) RETURNS VOID AS $$
+BEGIN
+    EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s
+                    FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl);
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION diesel_set_updated_at() RETURNS trigger AS $$
+BEGIN
+    IF (
+        NEW IS DISTINCT FROM OLD AND
+        NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at
+    ) THEN
+        NEW.updated_at := current_timestamp;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;

migrations/2025-02-10-212801_create_users/down.sql

@@ -0,0 +1 @@
+DROP TABLE users;

migrations/2025-02-10-212801_create_users/up.sql

@@ -0,0 +1,5 @@
+CREATE TABLE users (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR NOT NULL,
+    email VARCHAR NOT NULL UNIQUE
+);

src/crud/handlers.rs

@@ -0,0 +1,88 @@
+use actix_web::{web, HttpResponse, Responder};
+use diesel::pg::PgConnection;
+use diesel::r2d2::{self, ConnectionManager};
+use serde::Deserialize;
+
+use super::r#trait::CrudEntity;
+
+type DbPool = r2d2::Pool<ConnectionManager<PgConnection>>;
+
+#[derive(Deserialize)]
+struct Pagination {
+    limit: Option<i64>,
+    offset: Option<i64>,
+}
+
+pub async fn get_all<T: CrudEntity>(
+    pool: web::Data<DbPool>,
+    query: web::Query<Pagination>,
+) -> impl Responder {
+    let mut conn = match pool.get() {
+        Ok(conn) => conn,
+        Err(_) => return HttpResponse::InternalServerError().finish(),
+    };
+    match T::find_all(&mut conn, query.limit, query.offset) {
+        Ok(items) => HttpResponse::Ok().json(items),
+        Err(_) => HttpResponse::InternalServerError().finish(),
+    }
+}
+
+pub async fn get_one<T: CrudEntity>(
+    pool: web::Data<DbPool>,
+    id: web::Path<T::Id>,
+) -> impl Responder {
+    let mut conn = match pool.get() {
+        Ok(conn) => conn,
+        Err(_) => return HttpResponse::InternalServerError().finish(),
+    };
+    match T::find_by_id(&mut conn, id.into_inner()) {
+        Ok(item) => HttpResponse::Ok().json(item),
+        Err(diesel::result::Error::NotFound) => HttpResponse::NotFound().finish(),
+        Err(_) => HttpResponse::InternalServerError().finish(),
+    }
+}
+
+pub async fn create<T: CrudEntity>(
+    pool: web::Data<DbPool>,
+    item: web::Json<T::CreateInput>,
+) -> impl Responder {
+    let mut conn = match pool.get() {
+        Ok(conn) => conn,
+        Err(_) => return HttpResponse::InternalServerError().finish(),
+    };
+    match T::insert(&mut conn, item.into_inner()) {
+        Ok(created) => HttpResponse::Created().json(created),
+        Err(_) => HttpResponse::InternalServerError().finish(),
+    }
+}
+
+pub async fn update<T: CrudEntity>(
+    pool: web::Data<DbPool>,
+    id: web::Path<T::Id>,
+    item: web::Json<T::UpdateInput>,
+) -> impl Responder {
+    let mut conn = match pool.get() {
+        Ok(conn) => conn,
+        Err(_) => return HttpResponse::InternalServerError().finish(),
+    };
+    match T::update(&mut conn, id.into_inner(), item.into_inner()) {
+        Ok(updated) => HttpResponse::Ok().json(updated),
+        Err(diesel::result::Error::NotFound) => HttpResponse::NotFound().finish(),
+        Err(_) => HttpResponse::InternalServerError().finish(),
+    }
+}
+
+pub async fn delete<T: CrudEntity>(
+    pool: web::Data<DbPool>,
+    id: web::Path<T::Id>,
+) -> impl Responder {
+    let mut conn = match pool.get() {
+        Ok(conn) => conn,
+        Err(_) => return HttpResponse::InternalServerError().finish(),
+    };
+    match T::delete(&mut conn, id.into_inner()) {
+        Ok(_) => HttpResponse::NoContent().finish(),
+        Err(diesel::result::Error::NotFound) => HttpResponse::NotFound().finish(),
+        Err(_) => HttpResponse::InternalServerError().finish(),
+    }
+}

src/crud/mod.rs

@@ -0,0 +1,2 @@
+pub mod r#trait;
+pub mod handlers;

src/crud/trait.rs

@@ -0,0 +1,14 @@
+use diesel::prelude::*;
+use serde::{de::DeserializeOwned, Serialize};
+
+pub trait CrudEntity: Sized + Serialize {
+    type Id: Serialize + DeserializeOwned + 'static;
+    type CreateInput: DeserializeOwned + 'static;
+    type UpdateInput: DeserializeOwned + 'static;
+
+    fn find_all(conn: &mut PgConnection, limit: Option<i64>, offset: Option<i64>) -> Result<Vec<Self>, diesel::result::Error>;
+    fn find_by_id(conn: &mut PgConnection, id: Self::Id) -> Result<Self, diesel::result::Error>;
+    fn insert(conn: &mut PgConnection, item: Self::CreateInput) -> Result<Self, diesel::result::Error>;
+    fn update(conn: &mut PgConnection, id: Self::Id, item: Self::UpdateInput) -> Result<Self, diesel::result::Error>;
+    fn delete(conn: &mut PgConnection, id: Self::Id) -> Result<usize, diesel::result::Error>;
+}

src/db/connection.rs

@@ -0,0 +1,14 @@
+use diesel::pg::PgConnection;
+use diesel::r2d2::{self, ConnectionManager};
+use std::env;
+
+pub type Pool = r2d2::Pool<ConnectionManager<PgConnection>>;
+
+pub fn establish_connection_pool() -> Pool {
+    dotenv::dotenv().ok();
+    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
+    let manager = ConnectionManager::<PgConnection>::new(database_url);
+    r2d2::Pool::builder()
+        .build(manager)
+        .expect("Failed to create pool")
+}

src/db/mod.rs

@@ -0,0 +1 @@
+pub mod connection;

src/main.rs

@@ -1,3 +1,24 @@
-fn main() {
-    println!("Hello, world!");
+use actix_web::{web, App, HttpServer};
+use db::connection::establish_connection_pool;
+use models::user::User;
+use routes::crud::add_crud_routes;
+
+mod crud;
+mod models;
+mod db;
+mod routes;
+mod schema;
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    let pool = establish_connection_pool();
+
+    HttpServer::new(move || {
+        let mut app = App::new().app_data(web::Data::new(pool.clone()));
+        app = add_crud_routes::<User>(app, "/users");
+        app
+    })
+    .bind("0.0.0.0:3000")?
+    .run()
+    .await
 }

src/models/mod.rs

@@ -0,0 +1 @@
+pub mod user;

src/models/user.rs

@@ -0,0 +1,63 @@
+use diesel::prelude::*;
+use serde::{Serialize, Deserialize};
+use crate::{crud::r#trait::CrudEntity, schema::users};
+
+#[derive(Serialize, Deserialize, Queryable, Insertable)]
+#[diesel(table_name = users)]
+pub struct User {
+    id: i32,
+    name: String,
+    email: String,
+}
+
+#[derive(Deserialize, Insertable)]
+#[diesel(table_name = users)]
+pub struct NewUser {
+    name: String,
+    email: String,
+}
+
+#[derive(Deserialize, AsChangeset)]
+#[diesel(table_name = users)]
+pub struct UpdateUser {
+    name: String,
+    email: String,
+}
+
+impl CrudEntity for User {
+    type Id = i32;
+    type CreateInput = NewUser;
+    type UpdateInput = UpdateUser; // Changed from User to UpdateUser
+
+    fn find_all(conn: &mut PgConnection, limit: Option<i64>, offset: Option<i64>) -> Result<Vec<Self>, diesel::result::Error> {
+        use crate::schema::users::dsl::*;
+        let mut query = users.into_boxed();
+        if let Some(l) = limit {
+            query = query.limit(l);
+        }
+        if let Some(o) = offset {
+            query = query.offset(o);
+        }
+        query.load::<Self>(conn)
+    }
+
+    fn find_by_id(conn: &mut PgConnection, id: Self::Id) -> Result<Self, diesel::result::Error> {
+        use crate::schema::users::dsl::*;
+        users.filter(id.eq(id)).first::<Self>(conn)
+    }
+
+    fn insert(conn: &mut PgConnection, item: Self::CreateInput) -> Result<Self, diesel::result::Error> {
+        use crate::schema::users;
+        diesel::insert_into(users::table).values(&item).get_result(conn)
+    }
+
+    fn update(conn: &mut PgConnection, id: Self::Id, item: Self::UpdateInput) -> Result<Self, diesel::result::Error> {
+        use crate::schema::users::dsl::*;
+        diesel::update(users.filter(id.eq(id))).set(&item).get_result(conn)
+    }
+
+    fn delete(conn: &mut PgConnection, id: Self::Id) -> Result<usize, diesel::result::Error> {
+        use crate::schema::users::dsl::*;
+        diesel::delete(users.filter(id.eq(id))).execute(conn)
+    }
+}

src/routes/crud.rs

@@ -0,0 +1,24 @@
+use actix_web::{dev::{ServiceFactory, ServiceRequest}, web, App};
+use crate::crud::{handlers, r#trait::CrudEntity};
+
+pub fn add_crud_routes<T: CrudEntity + 'static>(mut app: App<T>, path: &str) -> App<T>
+where
+    T::Id: serde::de::DeserializeOwned + serde::Serialize + 'static,
+    T::CreateInput: serde::de::DeserializeOwned + 'static,
+    T::UpdateInput: serde::de::DeserializeOwned + 'static,
+
+
+    T: ServiceFactory<ServiceRequest, Config = (), Error = actix_web::Error, InitError = ()>
+{
+    app = app.service(
+        web::resource(path)
+            .route(web::get().to(handlers::get_all::<T>))
+            .route(web::post().to(handlers::create::<T>)),
+    );
+    app.service(
+        web::resource(&format!("{}/{{id}}", path))
+            .route(web::get().to(handlers::get_one::<T>))
+            .route(web::put().to(handlers::update::<T>))
+            .route(web::delete().to(handlers::delete::<T>)),
+    )
+}

src/routes/mod.rs

@@ -0,0 +1 @@
+pub mod crud;

src/schema.rs

@@ -0,0 +1,9 @@
+// @generated automatically by Diesel CLI.
+
+diesel::table! {
+    users (id) {
+        id -> Int4,
+        name -> Varchar,
+        email -> Varchar,
+    }
+}