如何从值为“”的 mongo db 中排除数据

Question

I have one excel sheet whose few row values are blank. In MongoDB that values goes in the form of ""(when view in edit mode) When I try to retrieve the data excluding "" values. I am still getting that.

My query is as below.

DrivetestdataLTE.find({
    latitude: { $ne:"" },
    longitude: { $ne:"" }}, { '_id': 0 }).lean().exec();
}

Saved data:

---

    "_id" : ObjectId("5de751d04a8590a009d4905a"),
    "log_hash" : "2.08E+17",
    "Time" : "33:23.7",
    "latitude" : "",
    "longitude" : "",

---

Answer 1

You can do something like this.

DrivetestdataLTE.find({
    latitude: { $ne:"" },
    longitude: { $ne:"" },{ '_id': 0 }}).exec();
}

Answer 2

you can find records, if field exist and value is empty

DrivetestdataLTE.find({ latitude: { $exists: true, $not: {$size: {"$gt":0}} }, longitude: { $exists: true, $not: {$size: {"$gt":0}} } })

or you can find if field is not exist

DrivetestdataLTE.find({ latitude: { $exists: false }, longitude: { $exists: false }  })