How can I query MongoDB with date range using mgo and Go?

Question

Hi I have a collection named \"my_sales\" having fields product_name, price, sale_date.

My doc looks like

{
    \"_id\" : ObjectId(\"5458b6ee09d76eb7         


        

Answer 1

You Can also check this out. If you are using this method then use parse:

db.getCollection('user').find({
    createdOn: {
        $gt: ISODate("2020-01-01T00:00:00.000Z"),
        $lt: ISODate("2020-03-01T00:00:00.000Z")
    }
})

Function without parsing: Get values using string

db, err := GetDB()
if err != nil {
    return nil, err
}
defer db.Session.Close()

var date []models.User

coll := db.C(constants.USERTABLE)

findQuery := bson.M{"createdOn": bson.M{"$gt": echo.FromDate, "$lt": echo.ToDate}}

shared.BsonToJSONPrint(findQuery)

err = coll.Find(findQuery).All(&date)
if err != nil {
    return nil, err
}
return date, nil
}

Answer 2

mgo supports time.Time for BSON dates.

So if your struct looks like this:

type Sale struct {
    ProductName string    `bson:"product_name"`
    Price       int       `bson:"price"`
    SaleDate    time.Time `bson:"sale_date"`
}

Then you can query it like this:

fromDate := time.Date(2014, time.November, 4, 0, 0, 0, 0, time.UTC)
toDate := time.Date(2014, time.November, 5, 0, 0, 0, 0, time.UTC)

var sales_his []Sale
err = c.Find(
    bson.M{
        "sale_date": bson.M{
            "$gt": fromDate,
            "$lt": toDate,
        },
    }).All(&sales_his)

Answer 3

I have new way to query date range:

// convert to date
fromTime := time.Unix(1509358405981/1000, 0)     

// Convert date to ObjectID with time    
fromObjectBson := bson.NewObjectIdWithTime(fromTime)

// condition     
bson.M{"_id":bson.M{"$gt": fromObjectBson}} 

This will speedup your query.