func addRemoveGroups(client redis.Client, articleID int, toAdd, toRemove []string) {
article := "article:" + strconv.Itoa(articleID)
for _, group := range toAdd {
if _, err := client.Sadd("group:"+group, []byte(article)); err != nil {
log.Fatal("Sadd エラーだよ", err.Error())
}
}
for _, group := range toRemove {
if _, err := client.Srem("group:"+group, []byte(article)); err != nil {
log.Fatal("Srem エラーだよ", err.Error())
}
}
}