feat: rand

Author: eastspire

frameworks/Rust/hyperlane/src/db.rs

@@ -207,7 +207,8 @@ pub async fn all_world_row() -> Vec<PgRow> {
 #[inline]
 pub async fn get_some_row_id(limit: Queries, db_pool: &DbPoolConnection) -> Vec<QueryRow> {
     let mut res: Vec<QueryRow> = Vec::with_capacity(limit as usize);
-    for id in 0..limit {
+    let id_list: Vec<i32> = get_random_id_list(limit);
+    for id in id_list {
         let tem: QueryRow = query_world_row(db_pool, id).await;
         res.push(tem);
     }

frameworks/Rust/hyperlane/src/utils.rs

@@ -22,3 +22,16 @@ pub fn get_random_id() -> Queries {
     let random_id: Queries = rand.generate::<Queries>() % (RANDOM_MAX as Queries + 1);
     random_id
 }
+
+#[inline]
+pub fn get_random_id_list(limit: Queries) -> Vec<i32> {
+    let mut id_list: Vec<i32> = (1..=limit).collect();
+    let mut rng: WyRand = WyRand::new();
+    let len: usize = id_list.len();
+    for i in (1..len).rev() {
+        let j = rng.generate_range(0..=i as u32) as usize;
+        id_list.swap(i, j);
+    }
+    id_list.truncate(limit as usize);
+    id_list
+}