Mongo Shell - Update

use sample_training
db.zips.find({ "zip": "12534" }).pretty()

{
    "_id" : ObjectId("5c8eccc1caa187d17ca73239"),
    "city" : "HUDSON",
    "zip" : "12534",
    "loc" : {
        "y" : 42.246978,
        "x" : 73.755248
    },
    "pop" : 21205,
    "state" : "NY"
}

$INC

Bu Operatör pozitif ve negatif değerleri kabul eder. Alan yoksa, alanı oluşturur ve alanı belirtilen değere ayarlar.

city field equal to "HUDSON".

db.zips.find({ "city": "HUDSON" }).count()
>16

adding 10 to the current value of the "pop" field.

db.zips.updateMany({ "city": "HUDSON" }, { "$inc": { "pop": 10 } })

{ "acknowledged" : true, "matchedCount" : 16, "modifiedCount" : 16 }

$SET

Bu Operatör belirli bir değere sahip bir alanın değerini değiştirir.

> db.zips.find({ "zip": "12534" }).pretty()
{
    "_id" : ObjectId("5c8eccc1caa187d17ca73239"),
    "city" : "HUDSON",
    "zip" : "12534",
    "loc" : {
        "y" : 42.246978,
        "x" : 73.755248
    },
    "pop" : 21215,
    "state" : "NY"
}

setting the value of the "pop" field to 1081.

>db.zips.updateOne({ "zip": "12534" }, { "$set": { "pop": 1081} })
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }

$PUSH

$push operatörü, bir diziye belirli bir değer ekler.

db.grades.find({ "student_id": 250, "class_id": 339 }).pretty()

{
    "_id" : ObjectId("56d5f7eb604eb380b0d8e292"),
    "student_id" : 250,
    "scores" : [
        {
            "type" : "exam",
            "score" : 3.6641013617826124
        },
        {
            "type" : "quiz",
            "score" : 16.099760154050923
        },
        {
            "type" : "homework",
            "score" : 18.069138737846245
        },
        {
            "type" : "homework",
            "score" : 66.16407292421133
        }
    ],
    "class_id" : 339
}

db.grades.updateOne({ "student_id": 250, "class_id": 339 },
                    { "$push": { "scores": { "type": "extra credit",
                                             "score": 100 }
                                }
                     })
 >{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }

{
    "_id" : ObjectId("56d5f7eb604eb380b0d8e292"),
    "student_id" : 250,
    "scores" : [
        {
            "type" : "exam",
            "score" : 3.6641013617826124
        },
        {
            "type" : "quiz",
            "score" : 16.099760154050923
        },
        {
            "type" : "homework",
            "score" : 18.069138737846245
        },
        {
            "type" : "homework",
            "score" : 66.16407292421133
        },
        {
            "type" : "extra credit",
            "score" : 100
        }
    ],
    "class_id" : 339
}