Method DeleteByLimit

models/document_history.go:193–224

根据文档id删除

(docId, limit int)

// 根据文档id删除
func (history *DocumentHistory) DeleteByLimit(docId, limit int) (err error) {
	if limit <= 0 {
		return
	}

	filter := orm.NewOrm().QueryTable(history.TableNameWithPrefix()).Filter("document_id", docId)

	var cnt int64
	cnt, err = filter.Count()
	if err != nil {
		return
	}

	l := int64(limit)

	if cnt > l {

		var histories []DocumentHistory
		var historyIds []interface{}

		filter2 := filter.OrderBy("history_id").Limit(cnt - l)
		filter2.All(&histories, "document_id", "version", "history_id")

		for _, item := range histories {
			ver := NewVersionControl(item.DocumentId, item.Version)
			ver.DeleteVersion()
			historyIds = append(historyIds, item.HistoryId)
		}
		filter.Filter("history_id__in", historyIds).Delete()
	}
	return
}