func Save(article *domain.Article) (int, error) {
change := mgo.Change{
Update: bson.M{"$inc": bson.M{"seq": 1}},
ReturnNew: true,
}
counter := Counter{}
colCounter.Find(bson.M{"_id": "article"}).Apply(change, &counter)
article.Id = counter.Seq
article.DayWrite = time.Now()
colArticle.Insert(article)
return article.Id, nil
}
