MongoDB How to use $not, $and/$or with $type? -

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i have different data types same field name f

with this reference,

i want find records not double , not null

i'm able find records not double by

db.foo.find({ f:{$not:{$type:1}} })

but can not combine query not null

tried with

db.foo.find({f:{$not:{$and:[{$type:1},{$type:10}]}}})' db.foo.find({$and:[{f:{$not:{$type:1}}}, {f:{$not:{$type:10}}}] })

but fails

any ?

what want $nor condition

db.foo.find({ $nor:[ { f: {$type:1} }, { f: null }] })

which means none of included arguments true. not simplified usage of finding null value.


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