use sqlite in basics/todo

basics/todo/.env

@@ -1 +1,3 @@
-DATABASE_URL=postgres://localhost/actix_todo
+DATABASE_URL=sqlite://${CARGO_MANIFEST_DIR}/todo.db
+SQLX_OFFLINE=true
+RUST_LOG=info

basics/todo/.gitignore

@@ -0,0 +1,2 @@
+todo.db
+todo.db-*

basics/todo/Cargo.toml

@@ -10,15 +10,12 @@ actix-session = "0.5.0-beta.7"
 
 dotenv = "0.15"
 env_logger = "0.9"
-futures = "0.3.7"
+futures-util = "0.3.7"
 log = "0.4"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 tera = "1.5"
 
 [dependencies.sqlx]
-features = [
-	"runtime-actix-rustls",
-	"postgres"
-	]
-version = "0.5.10"
+features = ["runtime-tokio-rustls", "sqlite", "offline"]
+version = "0.5.10"

basics/todo/README.md

@@ -1,15 +1,12 @@
-# actix-todo
+# Todo
 
-A port of the [Rocket Todo example](https://github.com/SergioBenitez/Rocket/tree/master/examples/todo) into [actix-web](https://actix.rs/). Except this uses PostgreSQL instead of SQLite.
-
-# Usage
+A simple Todo project using a SQLite database.
 
 ## Prerequisites
 
-* Rust >= 1.26
-* PostgreSQL >= 9.5
+- SQLite 3
 
-## Change into the project sub-directory
+## Change Into This Project Sub Directory
 
 All instructions assume you have changed into this folder:
 
@@ -17,33 +14,35 @@ All instructions assume you have changed into this folder:
 cd basics/todo
 ```
 
-## Set up the database
+## Set Up The Database
 
-Install the [sqlx](https://github.com/launchbadge/sqlx) command-line tool including the `postgres` feature:
+Install the [sqlx](https://github.com/launchbadge/sqlx/tree/HEAD/sqlx-cli) command-line tool with the required features:
 
-```bash
-cargo install sqlx-cli --no-default-features --features postgres
-```
-
-Check the contents of the `.env` file. If your database requires a password, update `DATABASE_URL` to be of the form:
-
-```.env
-DATABASE_URL=postgres://username:password@localhost:5432/actix_todo
+```sh
+cargo install sqlx-cli --no-default-features --features=rustls,sqlite
 ```
 
 Then to create and set-up the database run:
 
-```bash
+```sh
 sqlx database create
 sqlx migrate run
 ```
 
-## Run the application
+## Run The Application
 
-To run the application execute:
+Start the application with:
 
-```bash
+```sh
 cargo run
 ```
 
-Then to view it in your browser navigate to: [http://localhost:8088/](http://localhost:8088/)
+The app will be viewable in the browser at <http://localhost:8080>.
+
+## Modifying The Example Database
+
+For simplicity, this example uses SQLx's offline mode. If you make any changes to the database schema, this must be turned off or the `sqlx-data.json` file regenerated using the following command:
+
+```sh
+DATABASE_URL="sqlite://$(pwd)/todo.db" cargo sqlx prepare
+```

basics/todo/diesel.toml

@@ -1,5 +0,0 @@
-# For documentation on how to configure this file,
-# see diesel.rs/guides/configuring-diesel-cli
-
-[print_schema]
-file = "src/schema.rs"

basics/todo/migrations/20220205163207_create_tasks_table.down.sql

@@ -1 +1 @@
-DROP TABLE tasks
+DROP TABLE tasks;

basics/todo/migrations/20220205163207_create_tasks_table.up.sql

@@ -1,5 +1,5 @@
 CREATE TABLE tasks (
-  id SERIAL PRIMARY KEY,
+  id INTEGER PRIMARY KEY,
   description VARCHAR NOT NULL,
   completed BOOLEAN NOT NULL DEFAULT 'f'
 );

basics/todo/sqlx-data.json

@@ -0,0 +1,63 @@
+{
+  "db": "SQLite",
+  "2f4086eab47b13298a107ed8c0feaadab903468b8e4fbd39e465f581c7189272": {
+    "query": "\n            DELETE FROM tasks\n            WHERE id = $1\n            ",
+    "describe": {
+      "columns": [],
+      "parameters": {
+        "Right": 1
+      },
+      "nullable": []
+    }
+  },
+  "37443376215969e31bc6bc1ee00f01044647d95caf8efc61df7bf333b6a2149d": {
+    "query": "\n            UPDATE tasks\n            SET completed = NOT completed\n            WHERE id = $1\n            ",
+    "describe": {
+      "columns": [],
+      "parameters": {
+        "Right": 1
+      },
+      "nullable": []
+    }
+  },
+  "3a5b2a81088aa91ade3106165f926c337a88f4e29ae3bb170c4b687208aba20d": {
+    "query": "\n            SELECT *\n            FROM tasks\n            ",
+    "describe": {
+      "columns": [
+        {
+          "name": "id",
+          "ordinal": 0,
+          "type_info": "Int64"
+        },
+        {
+          "name": "description",
+          "ordinal": 1,
+          "type_info": "Text"
+        },
+        {
+          "name": "completed",
+          "ordinal": 2,
+          "type_info": "Bool"
+        }
+      ],
+      "parameters": {
+        "Right": 0
+      },
+      "nullable": [
+        false,
+        false,
+        false
+      ]
+    }
+  },
+  "ab058898a8a1b13174d03c9972af33214619f8aa3080bc27f88bd5b9212b8c0f": {
+    "query": "\n            INSERT INTO tasks (description)\n            VALUES ($1)\n            ",
+    "describe": {
+      "columns": [],
+      "parameters": {
+        "Right": 1
+      },
+      "nullable": []
+    }
+  }
+}

basics/todo/src/api.rs

@@ -1,9 +1,10 @@
 use actix_files::NamedFile;
 use actix_session::Session;
-use actix_web::middleware::ErrorHandlerResponse;
-use actix_web::{dev, error, http, web, Error, HttpResponse, Result};
+use actix_web::{
+    dev, error, http, middleware::ErrorHandlerResponse, web, Error, HttpResponse, Result,
+};
 use serde::Deserialize;
-use sqlx::postgres::PgPool;
+use sqlx::SqlitePool;
 use tera::{Context, Tera};
 
 use crate::{
@@ -12,7 +13,7 @@ use crate::{
 };
 
 pub async fn index(
-    pool: web::Data<PgPool>,
+    pool: web::Data<SqlitePool>,
     tmpl: web::Data<Tera>,
     session: Session,
 ) -> Result<HttpResponse, Error> {
@@ -44,7 +45,7 @@ pub struct CreateForm {
 
 pub async fn create(
     params: web::Form<CreateForm>,
-    pool: web::Data<PgPool>,
+    pool: web::Data<SqlitePool>,
     session: Session,
 ) -> Result<HttpResponse, Error> {
     if params.description.is_empty() {
@@ -73,7 +74,7 @@ pub struct UpdateForm {
 }
 
 pub async fn update(
-    db: web::Data<PgPool>,
+    db: web::Data<SqlitePool>,
     params: web::Path<UpdateParams>,
     form: web::Form<UpdateForm>,
     session: Session,
@@ -89,7 +90,7 @@ pub async fn update(
 }
 
 async fn toggle(
-    pool: web::Data<PgPool>,
+    pool: web::Data<SqlitePool>,
     params: web::Path<UpdateParams>,
 ) -> Result<HttpResponse, Error> {
     db::toggle_task(params.id, &pool)
@@ -99,7 +100,7 @@ async fn toggle(
 }
 
 async fn delete(
-    pool: web::Data<PgPool>,
+    pool: web::Data<SqlitePool>,
     params: web::Path<UpdateParams>,
     session: Session,
 ) -> Result<HttpResponse, Error> {

basics/todo/src/db.rs

@@ -1,19 +1,19 @@
-use sqlx::postgres::{PgPool, PgPoolOptions};
+use sqlx::sqlite::{SqlitePool, SqlitePoolOptions};
 
 use crate::model::{NewTask, Task};
 
-pub async fn init_pool(database_url: &str) -> Result<PgPool, sqlx::Error> {
-    PgPoolOptions::new()
-        .connect_timeout(std::time::Duration::from_secs(2))
+pub async fn init_pool(database_url: &str) -> Result<SqlitePool, sqlx::Error> {
+    SqlitePoolOptions::new()
+        .connect_timeout(std::time::Duration::from_secs(1))
         .connect(database_url)
         .await
 }
 
-pub async fn get_all_tasks(pool: &PgPool) -> Result<Vec<Task>, &'static str> {
+pub async fn get_all_tasks(pool: &SqlitePool) -> Result<Vec<Task>, &'static str> {
     Task::all(pool).await.map_err(|_| "Error retrieving tasks")
 }
 
-pub async fn create_task(todo: String, pool: &PgPool) -> Result<(), &'static str> {
+pub async fn create_task(todo: String, pool: &SqlitePool) -> Result<(), &'static str> {
     let new_task = NewTask { description: todo };
     Task::insert(new_task, pool)
         .await
@@ -21,14 +21,14 @@ pub async fn create_task(todo: String, pool: &PgPool) -> Result<(), &'static str
         .map_err(|_| "Error inserting task")
 }
 
-pub async fn toggle_task(id: i32, pool: &PgPool) -> Result<(), &'static str> {
+pub async fn toggle_task(id: i32, pool: &SqlitePool) -> Result<(), &'static str> {
     Task::toggle_with_id(id, pool)
         .await
         .map(|_| ())
         .map_err(|_| "Error toggling task completion")
 }
 
-pub async fn delete_task(id: i32, pool: &PgPool) -> Result<(), &'static str> {
+pub async fn delete_task(id: i32, pool: &SqlitePool) -> Result<(), &'static str> {
     Task::delete_with_id(id, pool)
         .await
         .map(|_| ())

basics/todo/src/main.rs

@@ -20,16 +20,14 @@ static SESSION_SIGNING_KEY: &[u8] = &[0; 32];
 #[actix_web::main]
 async fn main() -> io::Result<()> {
     dotenv().ok();
-
     env_logger::init_from_env(env_logger::Env::new().default_filter_or("info"));
 
     let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
-    println!("{}", database_url);
     let pool = db::init_pool(&database_url)
         .await
         .expect("Failed to create pool");
 
-    log::info!("starting HTTP serer at http://localhost:8088");
+    log::info!("starting HTTP serer at http://localhost:8080");
 
     HttpServer::new(move || {
         log::debug!("Constructing the App");
@@ -59,7 +57,8 @@ async fn main() -> io::Result<()> {
             .service(web::resource("/todo/{id}").route(web::post().to(api::update)))
             .service(Files::new("/static", "./static/"))
     })
-    .bind(("127.0.0.1", 8088))?
+    .bind(("127.0.0.1", 8080))?
+    .workers(2)
     .run()
     .await
 }

basics/todo/src/model.rs

@@ -1,19 +1,20 @@
-use sqlx::PgPool;
+use serde::{Deserialize, Serialize};
+use sqlx::SqlitePool;
 
 #[derive(Debug)]
 pub struct NewTask {
     pub description: String,
 }
 
-#[derive(Debug, serde::Deserialize, serde::Serialize)]
+#[derive(Debug, Deserialize, Serialize)]
 pub struct Task {
-    pub id: i32,
+    pub id: i64,
     pub description: String,
     pub completed: bool,
 }
 
 impl Task {
-    pub async fn all(connection: &PgPool) -> Result<Vec<Task>, sqlx::Error> {
+    pub async fn all(connection: &SqlitePool) -> Result<Vec<Task>, sqlx::Error> {
         let tasks = sqlx::query_as!(
             Task,
             r#"
@@ -23,10 +24,14 @@ impl Task {
         )
         .fetch_all(connection)
         .await?;
+
         Ok(tasks)
     }
 
-    pub async fn insert(todo: NewTask, connection: &PgPool) -> Result<(), sqlx::Error> {
+    pub async fn insert(
+        todo: NewTask,
+        connection: &SqlitePool,
+    ) -> Result<(), sqlx::Error> {
         sqlx::query!(
             r#"
             INSERT INTO tasks (description)
@@ -36,29 +41,31 @@ impl Task {
         )
         .execute(connection)
         .await?;
+
         Ok(())
     }
 
     pub async fn toggle_with_id(
         id: i32,
-        connection: &PgPool,
+        connection: &SqlitePool,
     ) -> Result<(), sqlx::Error> {
         sqlx::query!(
             r#"
             UPDATE tasks
             SET completed = NOT completed
             WHERE id = $1
-        "#,
+            "#,
             id
         )
         .execute(connection)
         .await?;
+
         Ok(())
     }
 
     pub async fn delete_with_id(
         id: i32,
-        connection: &PgPool,
+        connection: &SqlitePool,
     ) -> Result<(), sqlx::Error> {
         sqlx::query!(
             r#"
@@ -69,6 +76,7 @@ impl Task {
         )
         .execute(connection)
         .await?;
+
         Ok(())
     }
 }