Contagem de documentos

// Counts documents in a collection by using the Go driverpackage main
import (	"context"	"fmt"	"log"	"os"
	"github.com/joho/godotenv"	"go.mongodb.org/mongo-driver/v2/bson"	"go.mongodb.org/mongo-driver/v2/mongo"	"go.mongodb.org/mongo-driver/v2/mongo/options")
type Restaurant struct {	ID           bson.ObjectID `bson:"_id"`	Name         string	RestaurantId string `bson:"restaurant_id"`	Cuisine      string	Address      interface{}	Borough      string	Grades       interface{}}
func main() {	if err := godotenv.Load(); err != nil {		log.Println("No .env file found")	}
	var uri string	if uri = os.Getenv("MONGODB_URI"); uri == "" {		log.Fatal("You must set your 'MONGODB_URI' environment variable. See\n\t https://www.mongodb.com/pt-br/docs/drivers/go/current/usage-examples/#environment-variable")	}
	client, err := mongo.Connect(options.Client().ApplyURI(uri))	if err != nil {		panic(err)	}	defer func() {		if err = client.Disconnect(context.TODO()); err != nil {			panic(err)		}	}()
	coll := client.Database("sample_restaurants").Collection("restaurants")
	// Specifies a filter to match documents where the "cuisine" field	// has a value of "American"	filter := bson.D{{"cuisine", "American"}}
	// Retrieves and prints the estimated number of documents in the collection	estCount, estCountErr := coll.EstimatedDocumentCount(context.TODO())	if estCountErr != nil {		panic(estCountErr)	}
	// Retrieves and prints the number of matching documents in the collection	count, err := coll.CountDocuments(context.TODO(), filter)	if err != nil {		panic(err)	}
	// When you run this file, it should print:	// Estimated number of documents in the movies collection: 25359	// Number of restaurants with American cuisine: 6183	fmt.Printf("Estimated number of documents in the restaurants collection: %d\n", estCount)	fmt.Printf("Number of restaurants with American cuisine: %d\n", count)}