func (m *Song) Count(vocaloids ...*Vocaloid) (int64, error) {
db := db.Get("default")
var count int64
if len(vocaloids) < 1 {
return count, db.Select(&count, db.Count("Id"), db.From(&Song{}))
}
where := db.Where("Key", "=", vocaloids[0].Key)
for _, v := range vocaloids[1:] {
where = where.Or(db.Where("Key", "=", v.Key))
}
return count, db.Select(&count, db.Count("Id"), db.From(&SongVocaloid{}), where)
}
func (m *Song) FindByVocaloid(vocaloids []*Vocaloid, offset, limit int) ([]*Song, error) {
var songs []*Song
db := db.Get("default")
if len(vocaloids) == 0 {
return songs, db.Select(&songs, db.Distinct("*"), db.OrderBy("Id", genmai.DESC).Offset(offset).Limit(limit))
}
keys := make([]interface{}, len(vocaloids))
for i, v := range vocaloids {
keys[i] = v.Key
}
var songVocaloids []SongVocaloid
if err := db.Select(&songVocaloids, db.Distinct("VideoId"), db.Where("Key").In(keys...), db.OrderBy("Id", genmai.DESC).Offset(offset).Limit(limit)); err != nil {
return nil, err
}
keys = keys[:0]
for _, sv := range songVocaloids {
keys = append(keys, sv.VideoId)
}
return songs, db.Select(&songs, db.Distinct("*"), db.Where("VideoId").In(keys...), db.OrderBy("Id", genmai.DESC))
}