separed the db logic in the file "controllers.rs"

src/controllers.rs

@@ -1 +1,54 @@
+#[path = "models.rs"]
+pub mod models;
+#[path = "schema.rs"]
+pub mod schema;
 
+use crate::diesel::Connection;
+use crate::diesel::ExpressionMethods;
+use crate::diesel::QueryDsl;
+use crate::diesel::RunQueryDsl;
+use diesel::pg::PgConnection;
+use diesel::result::Error;
+use dotenv::dotenv;
+use models::Post;
+use std::env;
+
+pub const MAX_POSTS_PER_PAGE: i64 = 20;
+
+fn establish_connection() -> PgConnection {
+    dotenv().ok();
+
+    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL not setted");
+
+    PgConnection::establish(&database_url).expect(&format!("Error connecting to {}", database_url))
+}
+
+pub fn get_posts(page: i64) -> (Vec<Post>, i64) {
+    use schema::posts::dsl::*;
+
+    let connection = establish_connection();
+    let visible_posts = posts
+        .filter(published.eq(true))
+        .order(created_at.desc())
+        .limit(MAX_POSTS_PER_PAGE)
+        .offset(MAX_POSTS_PER_PAGE * (page - 1))
+        .load::<Post>(&connection)
+        .expect("Error loading posts");
+
+    let number_of_posts: i64 = posts
+        .filter(published.eq(true))
+        .count()
+        .get_result(&connection)
+        .expect("Error counting the posts");
+
+    (visible_posts, number_of_posts)
+}
+
+pub fn get_post(id_number: i32) -> Result<Post, Error> {
+    use schema::posts::dsl::*;
+
+    let connection = establish_connection();
+    let post = posts.find(id_number).first(&connection);
+
+    post
+}

src/main.rs

@@ -1,6 +1,7 @@
 #![feature(proc_macro_hygiene, decl_macro)]
 
 pub mod admin;
+pub mod controllers;
 pub mod misc;
 pub mod models;
 pub mod schema;
@@ -14,51 +15,17 @@ extern crate dotenv;
 extern crate rocket_contrib;
 extern crate tera;
 
-use self::diesel::prelude::*;
-use self::models::*;
 use comrak::{markdown_to_html, ComrakOptions};
-use diesel::pg::PgConnection;
-use diesel::result::Error;
-use dotenv::dotenv;
+use controllers::{get_post, get_posts, MAX_POSTS_PER_PAGE};
 use misc::get_context;
 use rocket::Request;
 use rocket_contrib::serve::StaticFiles;
 use rocket_contrib::templates::Template;
-use std::env;
 use std::vec::Vec;
 
-const MAX_POSTS_PER_PAGE: i64 = 20;
-
-fn establish_connection() -> PgConnection {
-    dotenv().ok();
-
-    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL not setted");
-    PgConnection::establish(&database_url).expect(&format!("Error connecting to {}", database_url))
-}
-
-fn get_posts(page: i64) -> (Vec<Post>, i64) {
-    use schema::posts::dsl::*;
-
-    let connection = establish_connection();
-    let visible_posts = posts
-        .filter(published.eq(true))
-        .limit(MAX_POSTS_PER_PAGE)
-        .offset(MAX_POSTS_PER_PAGE * (page - 1))
-        .load::<Post>(&connection)
-        .expect("Error loading posts");
-
-    let number_of_posts: i64 = posts
-        .filter(published.eq(true))
-        .count()
-        .get_result(&connection)
-        .expect("Error counting the posts");
-
-    (visible_posts, number_of_posts)
-}
-
 #[get("/?<page>")]
 fn index(page: Option<i8>) -> Template {
-    let page = page.unwrap_or_else(|| 1);
+    let page = page.unwrap_or(1);
 
     let mut context = get_context();
 
@@ -72,21 +39,12 @@ fn index(page: Option<i8>) -> Template {
     Template::render("index", context)
 }
 
-fn get_post(id_number: i32) -> Result<Post, Error> {
-    use schema::posts::dsl::*;
-
-    let connection = establish_connection();
-    let post = posts.find(id_number).first(&connection);
-
-    post
-}
-
 #[get("/post/<title>")]
 fn show_post(title: String) -> Template {
     let mut context = get_context();
 
     let title_splited: Vec<&str> = title.split('-').collect();
-    let id = title_splited.last().unwrap().parse().unwrap_or_else(|_| -1);
+    let id = title_splited.last().unwrap().parse().unwrap_or(-1);
 
     match get_post(id) {
         Ok(mut post) => {
@@ -96,7 +54,7 @@ fn show_post(title: String) -> Template {
             context.insert("post", &post);
             Template::render("post", context)
         }
-        Err(_e) => {
+        Err(_) => {
             let uri = format!("/post/{}", title_splited.join("-"));
             context.insert("url", &uri);
             Template::render("404", context)