Fix DB article code examples (#140)

This change fixes issue #139 and renders the code example

examples/og_databases/src/main.rs

@@ -1,98 +1,98 @@
 // <actor>
-// use actix::prelude::*;
+use actix::prelude::*;
 
-// struct DbExecutor(SqliteConnection);
+struct DbExecutor(SqliteConnection);
 
-// impl Actor for DbExecutor {
-//     type Context = SyncContext<Self>;
-// }
+impl Actor for DbExecutor {
+    type Context = SyncContext<Self>;
+}
 // </actor>
 
 // <message>
-// struct CreateUser {
-//     name: String,
-// }
+struct CreateUser {
+    name: String,
+}
 
-// impl Message for CreateUser {
-//     type Result = Result<User, Error>;
-// }
+impl Message for CreateUser {
+    type Result = Result<User, Error>;
+}
 // </message>
 
 // <handler>
-// impl Handler<CreateUser> for DbExecutor {
-//     type Result = Result<User, Error>;
+impl Handler<CreateUser> for DbExecutor {
+    type Result = Result<User, Error>;
 
-//     fn handle(&mut self, msg: CreateUser, _: &mut Self::Context) -> Self::Result {
-//         use self::schema::users::dsl::*;
+    fn handle(&mut self, msg: CreateUser, _: &mut Self::Context) -> Self::Result {
+        use self::schema::users::dsl::*;
 
-//         // Create insertion model
-//         let uuid = format!("{}", uuid::Uuid::new_v4());
-//         let new_user = models::NewUser {
-//             id: &uuid,
-//             name: &msg.name,
-//         };
+        // Create insertion model
+        let uuid = format!("{}", uuid::Uuid::new_v4());
+        let new_user = models::NewUser {
+            id: &uuid,
+            name: &msg.name,
+        };
 
-//         // normal diesel operations
-//         diesel::insert_into(users)
-//             .values(&new_user)
-//             .execute(&self.0)
-//             .expect("Error inserting person");
+        // normal diesel operations
+        diesel::insert_into(users)
+            .values(&new_user)
+            .execute(&self.0)
+            .expect("Error inserting person");
 
-//         let mut items = users
-//             .filter(id.eq(&uuid))
-//             .load::<models::User>(&self.0)
-//             .expect("Error loading person");
+        let mut items = users
+            .filter(id.eq(&uuid))
+            .load::<models::User>(&self.0)
+            .expect("Error loading person");
 
-//         Ok(items.pop().unwrap())
-//     }
-// }
+        Ok(items.pop().unwrap())
+    }
+}
 // </handler>
 
 // <main>
-// /// This is state where we will store *DbExecutor* address.
-// struct State {
-//     db: Addr<DbExecutor>,
-// }
+/// This is state where we will store *DbExecutor* address.
+struct State {
+    db: Addr<DbExecutor>,
+}
 
-// fn main() {
-//     let sys = actix::System::new("diesel-example");
+fn main() {
+    let sys = actix::System::new("diesel-example");
 
-//     // Start 3 parallel db executors
-//     let addr = SyncArbiter::start(3, || {
-//         DbExecutor(SqliteConnection::establish("test.db").unwrap())
-//     });
+    // Start 3 parallel db executors
+    let addr = SyncArbiter::start(3, || {
+        DbExecutor(SqliteConnection::establish("test.db").unwrap())
+    });
 
-//     // Start http server
-//     HttpServer::new(move || {
-//         App::with_state(State { db: addr.clone() })
-//             .resource("/{name}", |r| r.method(Method::GET).a(index))
-//     })
-//     .bind("127.0.0.1:8080")
-//     .unwrap()
-//     .start()
-//     .unwrap();
+    // Start http server
+    HttpServer::new(move || {
+        App::with_state(State { db: addr.clone() })
+            .resource("/{name}", |r| r.method(Method::GET).a(index))
+    })
+    .bind("127.0.0.1:8080")
+    .unwrap()
+    .start()
+    .unwrap();
 
-//     println!("Started http server: 127.0.0.1:8080");
-//     let _ = sys.run();
-// }
+    println!("Started http server: 127.0.0.1:8080");
+    let _ = sys.run();
+}
 // </main>
 
 // <index>
-// /// Async handler
-// fn index(req: &HttpRequest<State>) -> Box<Future<Item = HttpResponse, Error = Error>> {
-//     let name = &req.match_info()["name"];
+/// Async handler
+fn index(req: &HttpRequest<State>) -> Box<Future<Item = HttpResponse, Error = Error>> {
+    let name = &req.match_info()["name"];
 
-//     // Send message to `DbExecutor` actor
-//     req.state()
-//         .db
-//         .send(CreateUser {
-//             name: name.to_owned(),
-//         })
-//         .from_err()
-//         .and_then(|res| match res {
-//             Ok(user) => Ok(HttpResponse::Ok().json(user)),
-//             Err(_) => Ok(HttpResponse::InternalServerError().into()),
-//         })
-//         .responder()
-// }
+    // Send message to `DbExecutor` actor
+    req.state()
+        .db
+        .send(CreateUser {
+            name: name.to_owned(),
+        })
+        .from_err()
+        .and_then(|res| match res {
+            Ok(user) => Ok(HttpResponse::Ok().json(user)),
+            Err(_) => Ok(HttpResponse::InternalServerError().into()),
+        })
+        .responder()
+}
 // </index>