How to Ensure Document Expiration in MongoDB Using Go-Mongo-Driver?

Expiring Documents After a Specified Period in Golang Using Mongo

In Golang, mongo-go-driver provides the capability to automatically expire documents after a specified number of seconds. However, some users may encounter issues with this feature not functioning as intended.

To resolve this, it is crucial to adhere to the correct procedure for creating an expireAfterSeconds index. This involves setting up a TTL (Time-to-Live) index that determines the time period after which a document should be deleted.

Example Code for Expiring Documents

<code class="golang">package main

import (
    "context"
    "fmt"
    "log"
    "time"

    "github.com/Pallinder/go-randomdata"
    "go.mongodb.org/mongo-driver/bson"
    "go.mongodb.org/mongo-driver/bson/primitive"
    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

func main() {
    ctx := context.TODO()

    client, err := mongo.NewClient(options.Client().ApplyURI("mongodb://localhost:27017"))
    if err != nil {
        log.Fatal(err)
    }
    err = client.Connect(ctx)
    if err != nil {
        log.Fatal(err)
    }

    db := client.Database("LADB")
    col := db.Collection("LACOLL")

    // Add an index to the collection with an expireAfterSeconds option
    model := mongo.IndexModel{
        Keys:    bson.M{"createdAt": 1},
        Options: options.Index().SetExpireAfterSeconds(1),
    }
    ind, err := col.Indexes().CreateOne(ctx, model)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(ind)

    // Insert some documents with createdAt timestamp
    for i := 0; i <p><strong>Note:</strong> MongoDB's background task for removing expired documents runs every 60 seconds. Therefore, there may be a delay in deleting expired documents, potentially up to 60 seconds.</p></code>

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