Is there a way do to Bulk-findOne queries?

[steevej (Steeve Juneau)]

I would try to use an aggregation that start with a $documents stage where each document is a guid. The I would $lookup in the collection using localField and foreignField.
The general form of the pipeline would be something like:

pipeline = [
    { $documents : [
        { guid : guids[0] } ,
        { guid : guids[1] } ,
        // ... 
        { guid : guids[n-1] }
    ] } ,
   { $lookup : {
        from: <collection> ,
        localField : "guid" ,
        foreignField : "guid" ,
        as : "result"
   } }
] ;

db.aggregate( pipeline ) ;

I would worry too about:

@Frank

making separate findOne() queries, but I worry that 300 entirely separate queries from the NodeJS app will bring a lot of overhead