what is the equivalent of err := db.Model(&users).Where("id in (?)", pg.In(ids)).Select() in mongodb - mongodb

Question

I'm trying to switch a go backend project from postgres to mongodb, the final missing piece that I couldn't fix is this
err := db.Model(&users).Where("id in (?)", pg.In(ids)).Select()
Could anyone help me with its equivalent in mongodb
This is the code I want to change
const userloaderKey = "userloader"
func DataloaderMiddleware(db *pg.DB, next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
userloader := UserLoader{
maxBatch: 100,
wait: 1 * time.Millisecond,
fetch: func(ids []string) ([]*models.User, []error) {
var users []*models.User
err := db.Model(&users).Where("id in (?)", pg.In(ids)).Select()
if err != nil {
return nil, []error{err}
}
u := make(map[string]*models.User, len(users))
for _, user := range users {
u[user.ID] = user
}
result := make([]*models.User, len(ids))
for i, id := range ids {
result[i] = u[id]
}
return result, nil
},
}
ctx := context.WithValue(r.Context(), userloaderKey, &userloader)
next.ServeHTTP(w, r.WithContext(ctx))
})
}
func getUserLoader(ctx context.Context) *UserLoader {
return ctx.Value(userloaderKey).(*UserLoader)
}

Answer 1

The equivalent would be something like this
ids := []primitive.ObjectID{ // contains some IDs }
users := client.Database("myDatabase").Collection("users")
cur, err := users.Find(context.TODO(), bson.M{"_id": bson.M{"$in": ids}})

Answer 2

users := client.Database("myDatabase").Collection("users")
cur, err := users.Find(context.TODO(), bson.M{"_id": bson.M{"$in": ids}})
for cur.Next(context.TODO()) {
var user *models.User
err := cur.Decode(&user)
if err != nil {
log.Fatal(err)
}
users = append(users, user)
}
This did the job thank super