building db support with diesel.rs

cookbook/.env

@@ -0,0 +1 @@
+DATABASE_URL=db.sqlite3

cookbook/Cargo.toml

@@ -5,3 +5,6 @@ authors = ["artus <artus@landoftheunicorn.hd.free.fr>"]
 edition = "2018"
 
 [dependencies]
+libsqlite3-sys = { version = "*", features = ["bundled"] }
+diesel = { version = "1.4.1", features = ["sqlite"] }
+dotenv = "0.9.0"

cookbook/diesel.toml

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

cookbook/migrations/2019-01-27-201901_create_recipes/down.sql

@@ -0,0 +1,2 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE recipes

cookbook/migrations/2019-01-27-201901_create_recipes/up.sql

@@ -0,0 +1,8 @@
+-- Your SQL goes here
+CREATE TABLE recipes (
+  id INTEGER PRIMARY KEY NOT NULL,
+  title VARCHAR NOT NULL,
+  category INTEGER NOT NULL,
+  ingredients TEXT NOT NULL,
+  preparation TEXT NOT NULL
+)

cookbook/src/bin/show_recipes.rs

@@ -0,0 +1,23 @@
+extern crate cookbook;
+extern crate diesel;
+
+use self::cookbook::*;
+use self::models::*;
+use self::diesel::prelude::*;
+
+fn main() {
+    use cookbook::schema::recipes::dsl::*;
+
+    let conn = establish_connection();
+    let result = recipes
+        .limit(5)
+        .load::<Recipe>(&conn)
+        .expect("Error loading recipes");
+
+    println!("Here are {} recipes :", result.len());
+    for rec in result {
+        println!("{}", rec.title);
+        println!("-------------\n");
+        println!("{}", rec.ingredients);
+    }
+}

cookbook/src/lib.rs

@@ -1,7 +1,28 @@
+#[macro_use]
+extern crate diesel;
+extern crate dotenv;
+
+pub mod schema;
+pub mod models;
+
 mod recipe;
 mod storage;
 mod importer;
 
+use diesel::prelude::*;
+use dotenv::dotenv;
+use std::env;
+
+pub fn establish_connection() -> SqliteConnection {
+    dotenv().ok();
+
+    let db_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set !");
+    SqliteConnection::establish(&db_url)
+        .expect(&format!("Error connecting to {}", db_url))
+}
+
+
+
 #[cfg(test)]
 mod tests {
     #[test]

cookbook/src/models.rs

@@ -0,0 +1,8 @@
+#[derive(Queryable)]
+pub struct Recipe {
+    pub id: i32,
+    pub title: String,
+    pub category: i32,
+    pub ingredients: String,
+    pub preparation: String,
+}

cookbook/src/recipe.rs

@@ -40,8 +40,7 @@ impl Ingredient {
     pub(super) fn new(name: String) -> Ingredient {
         Ingredient {
             alias: vec![name],
-            ..
-            Default::default()
+            ..Default::default()
         }
     }
 

cookbook/src/schema.rs

@@ -0,0 +1,9 @@
+table! {
+    recipes (id) {
+        id -> Integer,
+        title -> Text,
+        category -> Integer,
+        ingredients -> Text,
+        preparation -> Text,
+    }
+}