fix: Use hsetnx for setting ephemeral key (#278)

crates/redis_interface/src/commands.rs

@@ -246,6 +246,25 @@ impl super::RedisConnectionPool {
             .await
     }
 
+    #[instrument(level = "DEBUG", skip(self))]
+    pub async fn serialize_and_set_multiple_hash_field_if_not_exist<V>(
+        &self,
+        kv: &[(&str, V)],
+        field: &str,
+    ) -> CustomResult<Vec<HsetnxReply>, errors::RedisError>
+    where
+        V: serde::Serialize + Debug,
+    {
+        let mut hsetnx: Vec<HsetnxReply> = Vec::with_capacity(kv.len());
+        for (key, val) in kv {
+            hsetnx.push(
+                self.serialize_and_set_hash_field_if_not_exist(key, field, val)
+                    .await?,
+            );
+        }
+        Ok(hsetnx)
+    }
+
     #[instrument(level = "DEBUG", skip(self))]
     pub async fn hscan(
         &self,