public void AddHistory(History history) {
try {
for (History tmp : helper.Histories().queryForEq("Book", history.getBook())) {
helper.Histories().deleteById(tmp.getId());
}
helper.Histories().create(history);
} catch (SQLException e) {
e.printStackTrace();
}
}
public List<History> GetAllHistories() {
try {
return helper.Histories().queryForAll();
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}