$all

$all 运算符用于选择字段的值是包含所有指定元素的数组的文档。 如果需要确保数组字段包含多个指定的元素，而不考虑数组中的顺序，则此运算符非常有用。

Syntax

db.collection.find({
    field : {
        $all: [ < value1 > , < value2 > ]
    }
})

参数

参数	Description
field	要查询的字段。
<value1> , <value2>	数组字段中必须全部存在的值。

例子

请考虑商店集合中的这个示例文档。

{
    "_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
                }
            ]
        }
    ]
}

示例 1：查找包含数组中所有指定元素的文档

此查询检索包含元素 Laptops 和 Smartphones 数组中的 salesByCategory.categoryName 文档。

db.stores.find({
    "sales.salesByCategory.categoryName": {
        $all: ["Laptops", "Smartphones"]
    }
}, {
    _id: 1,
    "sales.salesByCategory.categoryName": 1
}).limit(2)

此查询返回的前两个结果为：

[
    {
        "_id": "a57511bb-1ea3-4b26-bf0d-8bf928f2bfa8",
        "sales": {
            "salesByCategory": [
                {
                    "categoryName": "Smartphones"
                },
                {
                    "categoryName": "Laptops"
                }
            ]
        }
    },
    {
        "_id": "ca56d696-5208-40c3-aa04-d4e245df44dd",
        "sales": {
            "salesByCategory": [
                {
                    "categoryName": "Laptops"
                },
                {
                    "categoryName": "Smartphones"
                }
            ]
        }
    }
]

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