Port categories/slugs over to Diesel

src/category.rs

@@ -309,29 +309,18 @@ pub fn show(req: &mut Request) -> CargoResult<Response> {
 
 /// Handles the `GET /category_slugs` route.
 pub fn slugs(req: &mut Request) -> CargoResult<Response> {
-    let conn = req.tx()?;
-    let stmt = conn.prepare(
-        "SELECT slug FROM categories \
-         ORDER BY slug",
-    )?;
-    let rows = stmt.query(&[])?;
+    let conn = req.db_conn()?;
+    let slugs = categories::table
+        .select((categories::slug, categories::slug))
+        .order(categories::slug)
+        .load(&*conn)?;
 
-    #[derive(Serialize)]
+    #[derive(Serialize, Queryable)]
     struct Slug {
         id: String,
         slug: String,
     }
 
-    let slugs: Vec<Slug> = rows.iter()
-        .map(|r| {
-            let slug: String = r.get("slug");
-            Slug {
-                id: slug.clone(),
-                slug: slug,
-            }
-        })
-        .collect();
-
     #[derive(Serialize)]
     struct R {
         category_slugs: Vec<Slug>,

src/tests/category.rs

@@ -166,3 +166,45 @@ fn update_crate() {
     assert_eq!(cnt!(&mut req, "cat1::bar"), 1);
     assert_eq!(cnt!(&mut req, "category-2"), 0);
 }
+
+#[test]
+fn category_slugs_returns_all_slugs_in_alphabetical_order() {
+    let (_b, app, middle) = ::app();
+    {
+        let conn = app.diesel_database.get().unwrap();
+        ::new_category("Foo", "foo")
+            .create_or_update(&conn)
+            .unwrap();
+        ::new_category("Bar", "bar")
+            .create_or_update(&conn)
+            .unwrap();
+    }
+
+    let mut req = ::req(app, Method::Get, "/api/v1/category_slugs");
+
+    #[derive(Deserialize, Debug, PartialEq)]
+    struct Slug {
+        id: String,
+        slug: String,
+    }
+
+    #[derive(Deserialize, Debug, PartialEq)]
+    struct Slugs {
+        category_slugs: Vec<Slug>,
+    }
+
+    let response = ::json(&mut ok_resp!(middle.call(&mut req)));
+    let expected_response = Slugs {
+        category_slugs: vec![
+            Slug {
+                id: "bar".into(),
+                slug: "bar".into(),
+            },
+            Slug {
+                id: "foo".into(),
+                slug: "foo".into(),
+            },
+        ],
+    };
+    assert_eq!(expected_response, response);
+}