inital commit

update.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
+
+func updateOne(ctx context.Context, col *mongo.Collection) {
+	ctx, span := FollowSpan(ctx, "updateOne")
+	defer span.End()
+
+	filter := bson.M{
+		"title": "Высоконагруженные приложения. Программирование, масштабирование, поддержка",
+	}
+
+	update := bson.M{
+		"$set": bson.M{"rating": 5},
+	}
+
+	result, err := col.UpdateOne(ctx, filter, update)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Println("Updating 1 documents...")
+	fmt.Printf("Matched docs: %d. Updated docs: %d\n", result.MatchedCount, result.ModifiedCount)
+	fmt.Println("=============================")
+}
+
+func updateMany(ctx context.Context, col *mongo.Collection) {
+	ctx, span := FollowSpan(ctx, "updateMany")
+	defer span.End()
+
+	filter := bson.M{
+		"rating": 0,
+	}
+
+	update := bson.M{
+		"$set": bson.M{"rating": 3},
+	}
+
+	result, err := col.UpdateMany(ctx, filter, update)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Println("Updating many documents...")
+	fmt.Printf("Matched docs: %d. Updated docs: %d\n", result.MatchedCount, result.ModifiedCount)
+	fmt.Println("=============================")
+}
+
+func replaceOne(ctx context.Context, col *mongo.Collection) {
+	ctx, span := FollowSpan(ctx, "replaceOne")
+	defer span.End()
+
+	fmt.Println("replaceOne document...")
+	var updatedBook Book = Book{
+		Author: "Ньюмен Сэм",
+		Title:  "Создание микросервисов",
+		Year:   2016,
+	}
+
+	result, err := col.ReplaceOne(ctx, bson.M{"author": "Ньюмен Сэм"}, updatedBook, options.Replace().SetUpsert(true))
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Printf("Matched docs: %d. Updated docs: %d. Upserted docs: %d\n", result.MatchedCount, result.ModifiedCount, result.UpsertedCount)
+	fmt.Println("=============================")
+}