Empty results received from MongoDB queries executed within an asynchronous loop

I'm encountering an issue where I have a list of IDs that I need to query Mongo with in a for loop, but it always returns an empty []. Initially, the queries were returning promises, so I switched from using forEach to a standard for loop as shown here and also tried using toArray(), both of which resulted in an empty [].

async function queryRoles(id) {
    const db = await connectToMongo()
    let response;
    try {
        response = await db.collection("permissions").find({"_id": xxx}).toArray();
        console.log(await response);
    } catch (error) {
        console.log(error);
    }
    return response;
}

async function checkAuthorisation(list, groups) {
    for (const item of list) {
        const index = list.indexOf(item);
        const rolesList = await queryRoles(item._id);
        console.log(rolesList);
    };
    }

The rolesList is consistently empty and does not populate with any data.

Strangely, when I execute the same query for a single mongo document without using the for loop, I receive the expected response, confirming that the connection to MongoDB is functioning correctly.

What could be going wrong here? It's getting frustrating trying to figure this out!

Answer №1

Were you able to experiment with this method?

  async function checkAuthorization(list, groups) {
    const roleList = await Promise.all(
      list.map(async (item, index) => 
        await queryRoles(item._id)
      )
    );
    ...
  }

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