def getProjectHistory(self, pid):
     db_session.flush()
     db_session.commit()
     return db_session.query(HistoryEntity).filter(HistoryEntity.pid == pid).all()
 def getHistory(self):
     db_session.flush()
     db_session.commit()
     return db_session.query(HistoryEntity).all()
 def getUserHistory(self, uid):
     db_session.flush()
     db_session.commit()
     return db_session.query(HistoryEntity).filter(HistoryEntity.uid == uid).all()