finish backend tests of new db layout

src/model/boat.rs

@@ -1,6 +1,6 @@
 use rocket::serde::{Deserialize, Serialize};
 use rocket::FromForm;
-use sqlx::{FromRow, SqlitePool};
+use sqlx::{FromRow, Sqlite, SqlitePool, Transaction};
 
 use super::user::User;
 
@@ -70,6 +70,12 @@ impl Boat {
             .await
             .ok()
     }
+    pub async fn find_by_id_tx(db: &mut Transaction<'_, Sqlite>, id: i32) -> Option<Self> {
+        sqlx::query_as!(Self, "SELECT * FROM boat WHERE id like ?", id)
+            .fetch_one(db)
+            .await
+            .ok()
+    }
 
     pub async fn find_by_name(db: &SqlitePool, name: String) -> Option<Self> {
         sqlx::query_as!(Self, "SELECT * FROM boat WHERE name like ?", name)