Mongodb - bad query: BadValue unknown top level operator: $gte

Question

What is wrong with this query? I tried to run it on mongodb server and received an error as following - \"exception: bad query: BadValue unknown top level operator: $gte\".

Answer 1

You did this wrong. Should be:

db.scores.aggregate([
    { "$match": {
        "score": { "$gte": 30, "$lte": 60 }
    }},
    { "$group": {
        "_id": "$gamer",
        "games": { "$sum": 1 }
    }}
])

Which is the proper way to specify a "range" query where the actual conditions are "and" and therefore "between" the operands specified.