Graphql custom resolver with aggregate isn't working on the client side

MongoDB Atlas App Services & Realm
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1

Noob here. I created a custom resolver on graphql and the function for that resolver filters and counts each type of one field. This is the code:

result = await collection.aggregate([
      { $match: { post_id: input.post_id} },
      { $group: { _id: '$unicode', count: { $sum: 1 } } },
      { $project: { unicode: '$_id', count: 1, _id: 0 } }
    ]).toArray();

This function works when I test it under the console with non-system users and also on graphiql. But when I fetch the data from the client side it is giving this error.

Error aggregating reactions: FunctionError: intermediate aggregation document does not satisfy schema: reason=“could not validate document: \n\t(root): user_id is required\n\t(root): post_id is required\n\t(root): _id is required”; code=“SchemaValidationFailedRead”; untrusted=“read not permitted”; details=map

I don’t see the reason for requiring user_id and _id as I am not using to query or filter the collection. Appreciate any help

2

Did you ever find the solution to this? I’ve encountered the same thing after updating my schema to include require fields. I can retrieve single documents without issue but my custom resolver fails.