使用C++的ORM框架QxORM详解

#include "precompiled.h"
/***************************************************************
* @projectName  pluqt
* @brief        自定义ORM模型
* @author       lzw
* @date         2022-01-04
***************************************************************/
struct User
{
    long id;
    QString name;
    int age;
    QString hobbies;
};
QX_REGISTER_HPP_QX_DLL1(User, qx::trait::no_base_class_defined, 1)

#include "precompiled.h"
#include "qxmodels.h"
#include <QxOrm_Impl.h>
QX_REGISTER_CPP_QX_DLL1(User)
namespace qx
{
    template <> void register_class(QxClass<User> & t)
    {
        // 设置表名
        t.setName("User");
        // 注册 User::id <=> 数据库中的主键
        t.id(&User::id, "id");
        // 注册 User::name 属性，使用的 key 是 name，version 是 1。
        t.data(&User::name, "name", 1);
        // 注册 User::age 属性，使用的 key 是 age。
        t.data(&User::age, "age");
        // 注册 User::hobbies 属性，使用的 key 是 hobbies。
        t.data(&User::hobbies, "hobbies");
    }
}

 QString in_db = QCoreApplication::applicationDirPath();
    in_db.append("/database/plulocal.db");
    QFile::remove(in_db);
    qx::QxSqlDatabase::getSingleton()->setDriverName("QSQLITE");
    qx::QxSqlDatabase::getSingleton()->setDatabaseName(in_db);
    qx::QxSqlDatabase::getSingleton()->setHostName("localhost");
    qx::QxSqlDatabase::getSingleton()->setUserName("root");
    qx::QxSqlDatabase::getSingleton()->setPassword("");
    qx::QxSqlDatabase::getSingleton()->setSqlPlaceHolderStyle(qx::QxSqlDatabase::ph_style_2_point_name);
    qx::QxSqlDatabase::getSingleton()->setTraceSqlQuery(true);
    qx::QxSqlDatabase::getSingleton()->setTraceSqlRecord(false);

// 建表
    QSqlError daoError1 = qx::dao::create_table<User>();
    // 产生100条模拟数据
    for(int in_idx=0; in_idx<100; ++in_idx)
    {
        auto in_user = new User();
        in_user->name = "lzw"+QString::number(in_idx);
        in_user->age = 20+in_idx;
        in_user->hobbies = "play";
        auto daoError1 = qx::dao::insert(in_user);
    }
    // 查询单条记录
    User in_pointUser; in_pointUser.id = 3;
    qDebug()<<in_pointUser.name;
    QSqlError daoError11 = qx::dao::fetch_by_id(in_pointUser);
    qDebug()<<in_pointUser.name;
    // 查询一定年龄段的集合记录
    //typedef std::shared_ptr<User> UserPtr;
    //typedef qx::QxCollection<long, UserPtr> UserList;
    UserList in_userList;
    qx_query in_query("select * from user where age>=20 and age<=25");
    daoError11 = qx::dao::execute_query(in_query, in_userList);
    qAssert(! daoError11.isValid()); qAssert(in_userList.count() > 0);
    qx::dump(in_userList);

// 导出binary流
    qx::serialization::qt::to_file(in_pointUser, "user.txt");
    // 导出json文本
    qx::serialization::json::to_file(in_userList, "list_of_user.json");