大佬教程收集整理的这篇文章主要介绍了android – ORMLite – 查询外部字段，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
@DatabaseTable(tablename = "order") public class Order { @DatabaseField(generatedId = truE) private Long id; @DatabaseField(foreign = true,canBeNull = false,foreignAutorefresh = true,columnName = "customer_id") private Customer customer; // default constructor,getters and setters... } @DatabaseTable(tablename = "customer") public class Customer { @DatabaseField(generatedId = truE) private Long id; @DatabaseField private String name; // default constructor,getters and setters... }
SELECT o.* FROM order o JOIN customer c on o.customer_id = c.id WHERE (o.id = ?) OR (c.name = ?)
使用ORMLite执行此操作的最佳@L_673_5@是什么？
QueryBuilder<Customer,Integer> customerQb = customerDao.queryBuilder(); SELEctArg nameSELEctArg = new SELEctArg(); // this gives the c.name = ? customerQb.where().eq("name",nameSELEctArg); QueryBuilder<Account,Integer> orderQb = orderDao.queryBuilder(); SELEctArg idSELEctArg = new SELEctArg(); // this gives the o.id = ? orderQb.where().eq("id",idSELEctArg); orderQb.join(customerQb); // then you set the args and run the query nameSELEctArg.SETVALue("jim"); idSELEctArg.SETVALue(1); List<Order> results = orderQb.join(customerQb).query();
以上是大佬教程为你收集整理的android – ORMLite – 查询外部字段全部内容，希望文章能够帮你解决android – ORMLite – 查询外部字段所遇到的程序开发问题。
如果觉得大佬教程网站内容还不错，欢迎将大佬教程推荐给程序员好友。
本图文内容来源于网友网络收集整理提供，作为学习参考使用，版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ：384754419，请注明来意。