List posts

rust_web.org

@@ -535,6 +535,83 @@
       }
       #+END_SRC
 
+**** Create a template to list all posts
+
+***** Add a template for the index page ~templates/index.html.tera~
+      #+BEGIN_SRC html
+      {% extends "base" %}
+
+      {% block content %}
+      <h1>simple text board</h1>
+      <h2>index</h2>
+      <ul>
+        {% for post in posts %}
+        <li>{{ loop.index }} - <a href="post/{{ post.id }}">{{ post.title }}</a> - {{ post.author }}</li>
+        {% endfor %}
+      </ul>
+      {% endblock content %}
+      #+END_SRC
+
+***** Add serde dependencies to ~Cargo.toml~
+      #+BEGIN_SRC toml
+      chrono = { version = "0.4", features = ["serde"] }
+      ...
+      serde = { version = "1.0", features = ["derive"] }
+      #+END_SRC
+
+***** Add `Post` to ~src/models.rs~
+      #+BEGIN_SRC rust
+      ...
+      use diesel::{QueryResult, RunQueryDsl, SqliteConnection};
+      use serde::Serialize;
+
+      ...
+
+      #[derive(Debug, Queryable, Serialize)]
+      pub struct Post {
+          pub id: i32,
+          pub parent: Option<i32>,
+          pub timestamp: NaiveDateTime,
+          pub author: String,
+          pub email: String,
+          pub title: String,
+          pub content: String,
+      }
+
+      impl Post {
+          pub fn get_all(connection: &SqliteConnection) -> QueryResult<Vec<Post>> {
+              posts::table.load::<Post>(connection)
+          }
+      }
+      #+END_SRC
+
+***** Add index template in ~src/main.rs~
+      #+BEGIN_SRC rust
+      ...
+      use serde::Serialize;
+
+      ...
+
+      use models::{NewPost, Post};
+
+      ...
+
+      #[derive(Serialize)]
+      struct Posts {
+          posts: Vec<Post>,
+      }
+
+      #[get("/")]
+      fn index(conn: DbCon) -> Template {
+          Template::render(
+              "index",
+              Posts {
+                  posts: Post::get_all(&conn).unwrap(),
+              },
+          )
+      }
+      #+END_SRC
+
 * Conclusion
 
 ** What did we do?

simple_text_board/Cargo.lock

@@ -195,6 +195,7 @@ dependencies = [
  "libc",
  "num-integer",
  "num-traits",
+ "serde",
  "time",
  "winapi 0.3.9",
 ]
@@ -1124,6 +1125,20 @@ name = "serde"
 version = "1.0.119"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9bdd36f49e35b61d49efd8aa7fc068fd295961fd2286d0b2ee9a4c7a14e99cc3"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.119"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "552954ce79a059ddd5fd68c271592374bd15cab2274970380c000118aeffe1cd"
+dependencies = [
+ "proc-macro2 1.0.24",
+ "quote 1.0.8",
+ "syn 1.0.58",
+]
 
 [[package]]
 name = "serde_json"
@@ -1169,6 +1184,7 @@ dependencies = [
  "log 0.4.13",
  "rocket",
  "rocket_contrib",
+ "serde",
 ]
 
 [[package]]

simple_text_board/Cargo.toml

@@ -6,9 +6,10 @@ edition = "2018"
 
 [dependencies]
 rocket = "0.4"
-chrono = "0.4"
+chrono = { version = "0.4", features = ["serde"] }
 diesel = { version = "1.4", features = ["sqlite", "chrono"] }
 log = "0.4"
+serde = { version = "1.0", features = ["derive"] }
 
 [dependencies.rocket_contrib]
 version = "0.4"

simple_text_board/src/main.rs

@@ -15,11 +15,12 @@ use rocket::{
     routes, uri, FromForm,
 };
 use rocket_contrib::{database, templates::Template};
+use serde::Serialize;
 
 mod models;
 mod schema;
 
-use models::NewPost;
+use models::{NewPost, Post};
 
 #[database("sqlite")]
 struct DbCon(SqliteConnection);
@@ -32,6 +33,21 @@ struct PostForm {
     content: String,
 }
 
+#[derive(Serialize)]
+struct Posts {
+    posts: Vec<Post>,
+}
+
+#[get("/")]
+fn index(conn: DbCon) -> Template {
+    Template::render(
+        "index",
+        Posts {
+            posts: Post::get_all(&conn).unwrap(),
+        },
+    )
+}
+
 #[get("/create")]
 fn create_form(flash: Option<FlashMessage>) -> Template {
     let mut context = HashMap::new();
@@ -73,11 +89,6 @@ fn create_post(
     }
 }
 
-#[get("/")]
-fn index() -> &'static str {
-    "Hello, world!"
-}
-
 fn main() {
     rocket::ignite()
         .mount("/", routes![index, create_form, create_post])

simple_text_board/src/models.rs

@@ -1,6 +1,7 @@
 use crate::schema::posts::{self, dsl::posts as table_posts};
 use chrono::NaiveDateTime;
-use diesel::{QueryResult, RunQueryDsl};
+use diesel::{QueryResult, RunQueryDsl, SqliteConnection};
+use serde::Serialize;
 
 #[derive(Insertable)]
 #[table_name = "posts"]
@@ -18,3 +19,20 @@ impl NewPost<'_> {
         diesel::insert_into(table_posts).values(self).execute(conn)
     }
 }
+
+#[derive(Debug, Queryable, Serialize)]
+pub struct Post {
+    pub id: i32,
+    pub parent: Option<i32>,
+    pub timestamp: NaiveDateTime,
+    pub author: String,
+    pub email: String,
+    pub title: String,
+    pub content: String,
+}
+
+impl Post {
+    pub fn get_all(connection: &SqliteConnection) -> QueryResult<Vec<Post>> {
+        posts::table.load::<Post>(connection)
+    }
+}

simple_text_board/templates/index.html.tera

@@ -0,0 +1,11 @@
+{% extends "base" %}
+
+{% block content %}
+<h1>simple text board</h1>
+<h2>index</h2>
+<ul>
+  {% for post in posts %}
+  <li>{{ loop.index }} - <a href="post/{{ post.id }}">{{ post.title }}</a> - {{ post.author }}</li>
+  {% endfor %}
+</ul>
+{% endblock content %}