Implement changes to allow database connection for insertions

Also updated tests to reflect the new PgPool format being used. Tests now create a mock database on creation to determine if it works before removing it. Up to Chapter 4.

.drone.yml

@@ -13,6 +13,7 @@ steps:
     image: postgres:12-alpine
     environment:
       PGPASSWORD: password
+      DATABASE_URL: postgres://postgres:password@postgres:5432/newsletter
     commands:
       - sleep 35
       - "psql -U postgres -d newsletter -h postgres"
@@ -22,7 +23,6 @@ steps:
     commands:
       - apt update && apt install -y build-essential pkg-config libssl-dev # Dependancies for sqlx
       - cargo install --version=0.5.7 sqlx-cli --no-default-features --features postgres # Install sqlx
-      - sqlx database create
       - sqlx migrate run
 
   - name: test
@@ -39,4 +39,3 @@ services:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: password
       POSTGRES_DB: newsletter
-      DATABASE_URL: postgres://postgres:password@postgres:5432/newsletter

Cargo.lock

@@ -347,6 +347,7 @@ dependencies = [
  "libc",
  "num-integer",
  "num-traits 0.2.14",
+ "time 0.1.43",
  "winapi",
 ]
 
@@ -960,11 +961,13 @@ version = "0.1.0"
 dependencies = [
  "actix-rt",
  "actix-web",
+ "chrono",
  "config",
  "reqwest",
  "serde 1.0.130",
  "sqlx",
  "tokio",
+ "uuid",
 ]
 
 [[package]]
@@ -1901,6 +1904,16 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "time"
+version = "0.1.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca8a50ef2360fbd1eeb0ecd46795a87a19024eb4b53c5dc916ca1fd95fe62438"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "time"
 version = "0.2.27"
@@ -2138,6 +2151,9 @@ name = "uuid"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7"
+dependencies = [
+ "getrandom",
+]
 
 [[package]]
 name = "vcpkg"

Cargo.toml

@@ -11,6 +11,8 @@ path = "src/lib.rs"
 actix-web = "4.0.0-beta.8"
 config = "0.11.0"
 serde = { version = "1", features = ["derive"]}
+uuid = { version = "0.8.1", features = ["v4"] }
+chrono = "0.4.15"
 
 [dependencies.sqlx]
 version = "0.5.7"
@@ -28,3 +30,4 @@ features = [
 actix-rt = "2"
 reqwest = "0.11"
 tokio = "1"
+ 

src/configuration.rs

@@ -31,4 +31,11 @@ impl DatabaseSettings {
             self.username, self.password, self.host, self.port, self.database_name    
         )
     }
+
+    pub fn connection_string_without_db(&self) -> String {
+        format!(
+            "postgres://{}:{}@{}:{}",
+            self.username, self.password, self.host, self.port
+        )
+    }
 }

src/main.rs

@@ -1,14 +1,20 @@
 use mail_app::startup::run;
 use mail_app::configuration::get_configuration;
 use std::net::TcpListener;
+use sqlx::PgPool;
 
 #[actix_web::main]
 async fn main() -> std::io::Result<()> {
     // Attempt to read from config
     let configuration = get_configuration().expect("Failed to read configuration data.");
 
+    // Configure connection to database for our startup
+    let connection_pool = PgPool::connect(&configuration.database.connection_string())
+        .await
+        .expect("Failed to connect to Postgres.");
+
     // Take port from settings file
     let address = format!("127.0.0.1:{}", configuration.application_port);
     let listener = TcpListener::bind(address)?;
-    run(listener)?.await
+    run(listener, connection_pool)?.await
 }

src/routes/subscriptions.rs

@@ -1,4 +1,7 @@
 use actix_web::{web, HttpResponse};
+use sqlx::PgPool;
+use chrono::Utc;
+use uuid::Uuid;
 
 #[derive(serde::Deserialize)]
 pub struct FormData {
@@ -6,6 +9,26 @@ pub struct FormData {
     name: String
 }
 
-pub async fn subscribe(_form: web::Form<FormData>) -> HttpResponse {
+pub async fn subscribe(form: web::Form<FormData>, pool: web::Data<PgPool>,) -> HttpResponse {
-    HttpResponse::Ok().finish()
+    // _connect uses PgPool from the application state as defined in startup.rs
+    // Use a match statement for the query as it only returns two outcomes
+    match sqlx::query!(
+        r#"
+        INSERT INTO subscriptions (id, email, name, subscribed_at)
+        VALUES($1, $2, $3, $4)
+        "#,
+        Uuid::new_v4(),
+        form.email,
+        form.name,
+        Utc::now()
+    )
+    .execute(pool.as_ref())
+    .await
+    {
+        Ok(_) => HttpResponse::Ok().finish(),
+        Err(e) => {
+            println!("Failed to execute query: {}", e);
+            HttpResponse::InternalServerError().finish()
+        }
+    }
 }

src/startup.rs

@@ -1,14 +1,17 @@
 use actix_web::{web, App, HttpServer};
 use actix_web::dev::Server;
 use std::net::TcpListener;
+use sqlx::PgPool;
 
 use crate::routes;
 
-pub fn run(listener: TcpListener) -> Result<Server, std::io::Error> {
+pub fn run(listener: TcpListener, db_pool: PgPool) -> Result<Server, std::io::Error> {
-    let server = HttpServer::new(|| {
+    let db_pool = web::Data::new(db_pool); // Wrap connection in a smart pointer
+    let server = HttpServer::new(move || {
         App::new()
             .route("/health_check", web::get().to(routes::health_check))
             .route("/subscriptions", web::post().to(routes::subscribe))
+            .app_data(db_pool.clone()) // Get pointer copy and attach to application state
     })
     .listen(listener)?
     .run();

tests/health_check.rs

@@ -1,31 +1,68 @@
 use std::net::TcpListener;
-use mail_app::startup::run;
+use sqlx::{Connection, Executor, PgConnection, PgPool};
+use uuid::Uuid;
 
-use sqlx::{PgConnection, Connection};
+use mail_app::startup::run;
-use mail_app::configuration::get_configuration;
+use mail_app::configuration::{get_configuration, DatabaseSettings};
+
+pub struct TestApp {
+    pub address: String,
+    pub db_pool: PgPool,
+}
 
 // Create new instance of the application on a random port and return address [`http://localhost:XXXX`]
-fn spawn_app() -> String {
+async fn spawn_app() -> TestApp {
-    let listener = TcpListener::bind("127.0.0.1:0").expect("Failed to bind to random port");
+    let listener = TcpListener::bind("127.0.0.1:0")
+        .expect("Failed to bind to random port");
     let port = listener.local_addr().unwrap().port();
+    let address = format!("http://127.0.0.1:{}", port);
 
-    let server = run(listener).expect("Failed to bind address");
+    let mut configuration = get_configuration()
+        .expect("Failed to read configuration.");
+    configuration.database.database_name = Uuid::new_v4().to_string(); // Adjust database string to be random!
             
+    let connection_pool = configure_database(&configuration.database).await;
+
+    let server = run(listener, connection_pool.clone())
+        .expect("Failed to bind address");
     let _ = tokio::spawn(server);
+    TestApp {
+        address,
+        db_pool: connection_pool,
+    }
+}
 
-    format!("http://127.0.0.1:{}", port)
+pub async fn configure_database(config: &DatabaseSettings) -> PgPool {
+    // Create database
+    let mut connection = PgConnection::connect(&config.connection_string_without_db())
+        .await
+        .expect("Failed to connect to Postgres");
+    connection
+        .execute(&*format!(r#"CREATE DATABASE "{}";"#, config.database_name))
+        .await
+        .expect("Failed to create database.");
+
+    // Migrate database
+    let connection_pool = PgPool::connect(&config.connection_string())
+        .await
+        .expect("Failed to connect to Postgres.");
+    sqlx::migrate!("./migrations")
+        .run(&connection_pool)
+        .await
+        .expect("Failed to migrate the database");
+
+    connection_pool
 }
 
 #[actix_rt::test]
 async fn health_check_works() {
     // Arrange
-    let address = spawn_app();
+    let app = spawn_app().await;
     let client = reqwest::Client::new();
 
-    // Perform a 'reqwest' against endpoint
+    // Act
-
     let response = client
-        .get(&format!("{}/health_check", &address))
+        .get(&format!("{}/health_check", &app.address))
         .send()
         .await
         .expect("Failed to execute request.");
@@ -38,19 +75,13 @@ async fn health_check_works() {
 #[actix_rt::test]
 async fn subscribe_returns_200_for_valid_form_data() {
     // Arrange
-    let app_address = spawn_app();
+    let app = spawn_app().await;
-    let configuration = get_configuration().expect("Failed to read configuration.");
-    let connection_string = configuration.database.connection_string();
-    // Connection trait MUST be in scope to invoke.
-    let mut connection = PgConnection::connect(&connection_string)
-        .await
-        .expect("Failed to connect to Postgres.");
     let client = reqwest::Client::new();
-    let body = "name=le%20guin&email=usrula_le_guin%40gmail.com";
+    let body = "name=le%20guin&email=ursula_le_guin%40gmail.com";
 
     // Act
     let response = client
-        .post(&format!("{}/subscriptions", &app_address))
+        .post(&format!("{}/subscriptions", &app.address))
         .header("Content-Type", "application/x-www-form-urlencoded")
         .body(body)
         .send()
@@ -61,7 +92,7 @@ async fn subscribe_returns_200_for_valid_form_data() {
     assert_eq!(200, response.status().as_u16());
 
     let saved = sqlx::query!("SELECT email, name FROM subscriptions",)
-        .fetch_one(&mut connection)
+        .fetch_one(&app.db_pool)
         .await
         .expect("Failed to fetch saved subscription.");
 
@@ -70,9 +101,9 @@ async fn subscribe_returns_200_for_valid_form_data() {
 }
 
 #[actix_rt::test]
-async fn subscrib_returns_400_for_missing_form_data() {
+async fn subscribe_returns_400_for_missing_form_data() {
     //Arrange
-    let app_address = spawn_app();
+    let app = spawn_app().await;
     let client = reqwest::Client::new();
     let test_cases = vec![
         ("name=le%20guin", "missing the email"),
@@ -83,7 +114,7 @@ async fn subscrib_returns_400_for_missing_form_data() {
     for (invalid_body, error_message) in test_cases {
         // Act
         let response = client
-            .post(&format!("{}/subscriptions", &app_address))
+            .post(&format!("{}/subscriptions", &app.address))
             .header("Content-Type", "application/x-www-form-urlencoded")
             .body(invalid_body)
             .send()