一直以来,笔者都在不停寻找一种更人性化的数据库访问方式(并不是说默认的方式不好,而是有时候的确在模块化设计中不太方便)。
后来有幸在php中找到codeigniter的ActiveReord,详细参考这篇文章: 抽离CodeIgniter的数据库访问类!
然而c++却始终用着最原始的方式,昨天趁着项目要用的机会,在网上搜索了好久,总算让我找到两套c++的数据库访问框架:
soci
litesql
两套代码我都拿下来看了一下,litesql实现了一套完整的代码自动生成,功能强大,但是也很重;soci相对要轻量,但是同样也实现了数据结构到数据库表的映射。本人还是比较喜欢轻量的东西,所以最终选择了soci。经过这两天的试用,感觉非常不错。
官方的文档也很详细,所以这里就用我写的单元测试代码来做一下简单的讲解:
首先创建库表:
create database soci;CREATE TABLE `tb_test` ( `id` int(11) NOT NULL auto_increment, `name` varchar(32) default "", `sex` int(11) default 0, PRIMARY KEY (`id`), UNIQUE KEY `name` (`name`)); create database soci;CREATE TABLE `tb_test` ( `id` int(11) NOT NULL auto_increment, `name` varchar(32) default "", `sex` int(11) default 0, PRIMARY KEY (`id`), UNIQUE KEY `name` (`name`)); |
1.简单的select单条记录
TEST(soci,select_one){ try { session sql(mysql, "host=localhost db=soci user=dantezhu"); indicator ind; string name = "dandan"; int sex; sql << "select sex from tb_test where name = :name", into(sex, ind), use(name); ASSERT_EQ(ind, i_ok) << name; } catch (exception const &e) { FAIL()<<e.what(); }} TEST(soci,select_one){ try { session sql(mysql, "host=localhost db=soci user=dantezhu"); indicator ind; string name = "dandan"; int sex; sql << "select sex from tb_test where name = :name", into(sex, ind), use(name); ASSERT_EQ(ind, i_ok) << name; } catch (exception const &e) { FAIL()<<e.what(); }} |
select的结果,如果成功则ind会为i_ok,同值sex被赋值;如果失败则反之
2.简单的select多条记录
TEST(soci,select_multi2){ try { session sql(mysql, "db=soci user=dantezhu"); indicator ind; int count; sql << "select count(*) from tb_test", into(count, ind); ASSERT_EQ(ind, i_ok) << count; if (count == 0) { SUCCEED(); return; } int sex = 1; vector<string> vec_name(count); vector<int> vec_sex(count); sql << "select name,sex from tb_test where sex = :sex", into(vec_name), into(vec_sex), use(sex); } catch (exception const &e) { FAIL()<<e.what(); }} TEST(soci,select_multi2){ try { session sql(mysql, "db=soci user=dantezhu"); indicator ind; int count; sql << "select count(*) from tb_test", into(count, ind); ASSERT_EQ(ind, i_ok) << count; if (count == 0) { SUCCEED(); return; } int sex = 1; vector<string> vec_name(count); vector<int> vec_sex(count); sql << "select name,sex from tb_test where sex = :sex", into(vec_name), into(vec_sex), use(sex); } catch (exception const &e) { FAIL()<<e.what(); }} |