Relationship data is returning null

I'm not sure if this was already asked here, I cannot find the same issue I'm having. So here it is.

Currently, I have two collections with relationship Entry <-- Category, when I'm trying to fetch the data of the Entry the Category data I needed returns to me is null.

TypeScript

export async function getEntries() {
  const { documents } = await databases.listDocuments(
    process.env.NEXT_PUBLIC_APPWRITE_JOURNAL_DATABASE_ID as string,
    process.env.NEXT_PUBLIC_APPWRITE_JOURNAL_COLLECTION_ID_ENTRY as string
  );
  return {
    entries: documents.map(mapDocumentToEntries),
  };
}

I'm thinking maybe, I need to use the Collection_ID for the Category collection. But the API only accepts one Collection_ID

TL;DR

Issue: Relationship data returning null when fetching entries with corresponding categories data. Solution: Ensure to set up the relationship between `Entry` and `Category` as "many to one" to have the categories data populated in entries. Additionally, when fetching entries, use the correct `Collection_ID` for the Category collection to get the desired data.