It`s hard to take Select Where from nodebb using MongoDb

[dread]

I just want to select users id, where "fbid" not equal " "(is exists).
I try in mongo shell execute

db.objects.find({_key:"users:uid"}, {fbid: {$ne: ""}})
Error: error: {
"waitedMS" : NumberLong(0),
"ok" : 0,
"errmsg" : "Unsupported projection option: fbid: { $ne: "" }",
"code" : 2
}

and

db.objects.find({_key:"users:uid"}, {$where:"this.fbid != ''"})

show me nothing. What am I doing wrong? thx in advise.

[baris]

@dread said in It`s hard to take Select Where from nodebb using MongoDb:

db.objects.find({_key:"users:uid"}, {fbid: {$ne: ""}})

Try
db.objects.find({_key: /^user:\d+/, fbid: {$ne:""}}) and
db.objects.find({_key: /^user:\d+/, fbid: {$exists:true}})

[dread]

@baris thank`s a lot! db.objects.find({_key: /^user:\d+/, fbid: {$exists:true}}) - perfect query for me!