MongoDB Aggregation Sort – Basic Guide

MongoDB Aggregation Sort Featured Image

In this tutorial, I will discuss how to use the MongoDB aggregation sort operator. The MongoDB aggregation sort operator sorts a given document in an ascending or descending order by its field value.

This guide aims to demonstrate examples to help you understand how you can use the MongoDB aggregate sort operator. So, let us get this amazing guide started!

The MongoDB Aggregate Sort Syntax

Let us take a look at the MongoDB aggregate sort syntax:


When we specify the value of a given field for sort as 1, the operation sorts the output in ascending order. When we specify it as -1, then the output is sorted according to descending order.

Let us get started with using the MongoDB aggregation sort operator inside the mongo shell.

Sorting Output in Ascending Order Using MongoDB Sort Operator

Let us look at an example of sorting our documents in an ascending order using the MongoDB sort operator.

  • Start up the Mongo local database server
  • Navigate into a database you want to use inside the mongo shell
  • Let us take a quick look at the documents available in our collection:
> db.drones.find().pretty()
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0c"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Nimbari Gryphon Medeta 65",
        "price" : 77500,
        "weight" : "77 kilograms",
        "additionalDetails" : {
                "material" : "carbon fiber",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Cinematography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0d"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "X-Strimmer Eye",
        "price" : 23500,
        "weight" : "24 kilograms",
        "additionalDetails" : {
                "material" : "glass fiber",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Cinematography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0e"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Khai Balemosh Shefqa TRX",
        "price" : 120500,
        "weight" : "80 kilograms",
        "additionalDetails" : {
                "material" : "aluminum",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Videography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0f"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Sifinist Croma AX",
        "price" : 99500,
        "weight" : "97 kilograms",
        "additionalDetails" : {
                "material" : "lithium",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Videography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf10"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Drovce Finnifield FR-7",
        "price" : 87600,
        "weight" : "13 kilograms",
        "additionalDetails" : {
                "material" : "polysterene",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Videography"
                ]
        }
}
  • Now, let us sort the documents in ascending order by price.
> db.drones.aggregate(    [      { $sort : { price : 1 } }    ] ).pretty()
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0d"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "X-Strimmer Eye",
        "price" : 23500,
        "weight" : "24 kilograms",
        "additionalDetails" : {
                "material" : "glass fiber",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Cinematography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0c"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Nimbari Gryphon Medeta 65",
        "price" : 77500,
        "weight" : "77 kilograms",
        "additionalDetails" : {
                "material" : "carbon fiber",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Cinematography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf10"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Drovce Finnifield FR-7",
        "price" : 87600,
        "weight" : "13 kilograms",
        "additionalDetails" : {
                "material" : "polysterene",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Videography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0f"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Sifinist Croma AX",
        "price" : 99500,
        "weight" : "97 kilograms",
        "additionalDetails" : {
                "material" : "lithium",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Videography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0e"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Khai Balemosh Shefqa TRX",
        "price" : 120500,
        "weight" : "80 kilograms",
        "additionalDetails" : {
                "material" : "aluminum",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Videography"
                ]
        }
}

Great! We now receive a price lowest to the highest ordered list of documents printed for us.

Sorting Output in Descending Order Using the MongoDB Aggregation Sort Operator

We will now sort the documents in a highest to lowest price range order with our MongoDB aggregation sort operator.

> db.drones.aggregate(    [      { $sort : { price : -1 } }    ] ).pretty()
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0e"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Khai Balemosh Shefqa TRX",
        "price" : 120500,
        "weight" : "80 kilograms",
        "additionalDetails" : {
                "material" : "aluminum",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Videography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0f"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Sifinist Croma AX",
        "price" : 99500,
        "weight" : "97 kilograms",
        "additionalDetails" : {
                "material" : "lithium",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Videography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf10"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Drovce Finnifield FR-7",
        "price" : 87600,
        "weight" : "13 kilograms",
        "additionalDetails" : {
                "material" : "polysterene",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Videography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0c"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "Nimbari Gryphon Medeta 65",
        "price" : 77500,
        "weight" : "77 kilograms",
        "additionalDetails" : {
                "material" : "carbon fiber",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Cinematography"
                ]
        }
}
{
        "_id" : ObjectId("61673f46b34f185eb7b2bf0d"),
        "utility" : [
                "Natural Resource Exploration",
                "Remote sensing",
                "Real estate and construction",
                "Recreation",
                "Delivery"
        ],
        "onSale" : false,
        "name" : "X-Strimmer Eye",
        "price" : 23500,
        "weight" : "24 kilograms",
        "additionalDetails" : {
                "material" : "glass fiber",
                "moreUses" : [
                        "Precision Agriculture",
                        "Land Inspection",
                        "Water Inspection",
                        "Cinematography"
                ]
        }
}

We can now see the documents starting from the highest prices at the top.

Read More: Sort Modifier in MongoDB

Conclusion

In this article, we learned to use the MongoDB aggregation sort operator.

Noteworthy References

https://docs.mongodb.com/upcoming/reference/operator/aggregation/sort/#behavior

https://stackoverflow.com/questions/12451322/mongodb-aggregation-sort/12451547