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$each

Operator $each digunakan dalam operasi $addToSet atau $push untuk menambahkan beberapa elemen ke bidang array dalam satu operasi pembaruan. Operator ini berguna ketika Anda perlu menyisipkan beberapa item ke dalam array tanpa harus melakukan beberapa operasi pembaruan. Operator $each memastikan bahwa setiap item dalam array yang ditentukan ditambahkan ke array target.

Syntax

{
  $push: {
    <field>: {
      $each: [ <value1>, <value2>],
      <modifier1>: <value1>,
      <modifier2>: <value2>
    }
  }
}

Parameter-parameternya

Pengaturan Description
<field> Bidang yang akan diperbarui.
$each Array nilai yang akan ditambahkan ke bidang array.
<modifier> Pengubah opsional seperti $sort, , dan $slice untuk mengontrol perilaku $position$pushoperasi.

Examples

Pertimbangkan dokumen sampel ini dari koleksi toko.

{
    "_id": "0fcc0bf0-ed18-4ab8-b558-9848e18058f4",
    "name": "First Up Consultants | Beverage Shop - Satterfieldmouth",
    "location": {
        "lat": -89.2384,
        "lon": -46.4012
    },
    "staff": {
        "totalStaff": {
            "fullTime": 8,
            "partTime": 20
        }
    },
    "sales": {
        "totalSales": 75670,
        "salesByCategory": [
            {
                "categoryName": "Wine Accessories",
                "totalSales": 34440
            },
            {
                "categoryName": "Bitters",
                "totalSales": 39496
            },
            {
                "categoryName": "Rum",
                "totalSales": 1734
            }
        ]
    },
    "promotionEvents": [
        {
            "eventName": "Unbeatable Bargain Bash",
            "promotionalDates": {
                "startDate": {
                    "Year": 2024,
                    "Month": 6,
                    "Day": 23
                },
                "endDate": {
                    "Year": 2024,
                    "Month": 7,
                    "Day": 2
                }
            },
            "discounts": [
                {
                    "categoryName": "Whiskey",
                    "discountPercentage": 7
                },
                {
                    "categoryName": "Bitters",
                    "discountPercentage": 15
                },
                {
                    "categoryName": "Brandy",
                    "discountPercentage": 8
                },
                {
                    "categoryName": "Sports Drinks",
                    "discountPercentage": 22
                },
                {
                    "categoryName": "Vodka",
                    "discountPercentage": 19
                }
            ]
        },
        {
            "eventName": "Steal of a Deal Days",
            "promotionalDates": {
                "startDate": {
                    "Year": 2024,
                    "Month": 9,
                    "Day": 21
                },
                "endDate": {
                    "Year": 2024,
                    "Month": 9,
                    "Day": 29
                }
            },
            "discounts": [
                {
                    "categoryName": "Organic Wine",
                    "discountPercentage": 19
                },
                {
                    "categoryName": "White Wine",
                    "discountPercentage": 20
                },
                {
                    "categoryName": "Sparkling Wine",
                    "discountPercentage": 19
                },
                {
                    "categoryName": "Whiskey",
                    "discountPercentage": 17
                },
                {
                    "categoryName": "Vodka",
                    "discountPercentage": 23
                }
            ]
        }
    ]
}

Contoh 1: Menambahkan beberapa elemen ke array

Kueri ini menambahkan beberapa peristiwa promosi baru ke promotionEvents array.

db.stores.updateOne({
    name: "Lenore's New DJ Equipment Store"
}, {
    $push: {
        promotionEvents: {
            $each: [{
                    eventName: "Grand Savings",
                    promotionalDates: {
                        startDate: "2024-08-01",
                        endDate: "2024-08-31"
                    },
                    discounts: [{
                        categoryName: "DJ Headphones",
                        discountPercentage: 5
                    }]
                },
                {
                    eventName: "Big Bargain",
                    promotionalDates: {
                        startDate: "2024-11-25",
                        endDate: "2024-11-30"
                    },
                    discounts: [{
                        categoryName: "DJ Headphones",
                        discountPercentage: 20
                    }]
                }
            ]
        }
    }
})

Kueri ini mengembalikan hasil berikut.

[
  {
    "acknowledged": true,
    "insertedId": null,
    "matchedCount": "0",
    "modifiedCount": "0",
    "upsertedCount": 0
  }
]

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