Mongodb query to select less than and equal based on custom comparator -


i using mongodb database , need run less , equal filter based on custom comparator. following more details.

  1. "profile" collection having "level" field string 

    {"name":"test1", "level":"intermediate"}

  2. following value of level , corresponding weight

    1. novice
    2. intermediate
    3. experienced
    4. advance

  3. i want write query below should return profile collection level less , equal "experienced" (i.e. includes result "novice", "intermediate" , "experienced"

    db.profile.find( { level: { $lte: "experienced" } } )

i understand, need provide custom comparator. how can do?

you can't use custom comparators in mongodb query. ones available are: $eq, $gt, $gte, $lt, $lte, $ne, $in, $nin.

you can, however, use $in want:

db.profile.find( { level: { $in: [ "experienced", "intermediate ", "novice" ] } } );

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