How to iterate through result object after querying in mongo DB shell

mongo-shell, mongodb

Solution

result['result'].forEach(function(doc){
    db.students.update(
        {'_id': doc._id}, 
        {'$pull':{'scores': {'score': doc.minitem }}}
    );
});

Uses the forEach function within the Mongo Shell.

Note that after aggregation the documents are actually within a `result` element within the return document currently.

Problem

I am having a JSON array object something like `[{_id:64,minitem:30},{},{}...]` inside a variable result.. This is the result of an aggregation operation which is a projection of minimum score. I need to iterate over this result and delete the minvales from DB. I am unable to loop over the result object .. I tried ``` for(i=0; i<result.length; i++){ db.students.update({ '_id': result['_id'] }, { '$pull': { 'scores': { 'score': result[i]['minitem'] } } }) } ``` This doesnt seem to have an effect. DB is unaltered. I am trying this from `mongo` shell.

Original source