android - 如何从 ORMLITE 中删除记录？

Question

我需要从 ORMLite 数据库中删除一条记录我可以使用以下方式按 id 删除一条记录

@Override
public void Delete(int id) throws SQLException {
    this.dao.deleteById(id);
}

但是如果我必须从同一个表中删除一条记录而不是按 id 而是按名称或任何其他字段怎么办我想要类似的东西

public void Deletefromcanteen(String name,MealType mealtype) {
    this.dao.deletebyName(name);
}

我应该使用 querybuilder 编写什么查询来删除 name = name 和 mealtype = say (lunch) 的记录

我在我的数据库助手类中尝试了类似的方法

public  void deletefromcanteen(int id, String mealtype) {
    try {
        Dao<CanteenLog, Integer> canteenDao = getCanteen();
        DeleteBuilder<CanteenLog, Integer> deleteBuilder = canteenDao
                .deleteBuilder();
        deleteBuilder.where().eq("user_id", id).and().eq("meal", mealtype);
        canteenDao.delete(deleteBuilder.prepare());
    } catch (Exception e) {
        ...
    }
}

Answer 1

deleteBuilder.where().eq("FIELD_NAME", arg);
deleteBuilder.delete();

更新:

例如:

//Get helper
DatabaseHelper helper = OpenHelperManager.getHelper(App.getContext(), DatabaseHelper.class);

//get dao
Dao dao = helper.getDao(YOUR_CLASS.class);

//delete elements from table in field by arg
DeleteBuilder<CanteenLog, Integer> deleteBuilder = dao.deleteBuilder();
deleteBuilder.where().eq("FIELD_NAME", arg);
deleteBuilder.delete();

祝你好运!