add selecting entries from the database

src/model.rs

@@ -11,6 +11,25 @@ pub struct Link {
 }
 
 impl Link {
+    pub async fn find_by_uuid(
+        uuid: String,
+        pool: web::Data<Pool<Sqlite>>,
+    ) -> Result<Link, sqlx::Error> {
+        let mut tx = pool.begin().await?;
+        let rec = sqlx::query!(
+            r#"
+                    SELECT * FROM links WHERE uuid = $1
+                "#,
+            uuid
+        )
+        .fetch_one(&mut tx)
+        .await?;
+
+        Ok(Link {
+            uuid: rec.UUID,
+            destination: rec.DESTINATION,
+        })
+    }
     pub async fn create(link: Link, pool: web::Data<Pool<Sqlite>>) -> Result<Link, sqlx::Error> {
         let mut tx = pool.begin().await?;
         sqlx::query("INSERT INTO links (uuid, destination) VALUES ($1, $2);")