UCS/sqlite_orm: ❤️ SQLite ORM light header only library for modern C++

examples/unique.cpp

47 строк2 KB

fnc12

changed throwing exception type from std::error_code to std::system_error

08 мар 2018, 09:32

08 мар 2018, 09:32737ee83


#include <sqlite_orm/sqlite_orm.h>
#include <string>
#include <memory>
#include <iostream>

using std::cout;
using std::endl;
using std::cerr;

struct Entry {
    int id;
    std::string uniqueColumn;
    std::shared_ptr<std::string> nullableColumn;
};

int main(int argc, char **argv) {
    using namespace sqlite_orm;
    auto storage = make_storage("unique.sqlite",
                                make_table("unique_test",
                                           make_column("id",
                                                       &Entry::id,
                                                       autoincrement(),
                                                       primary_key()),
                                           make_column("unique_text",
                                                       &Entry::uniqueColumn,
                                                       unique()),
                                           make_column("nullable_text",
                                                       &Entry::nullableColumn)));
    storage.sync_schema();
    storage.remove_all<Entry>();
    
    try {
        auto sameString = "Bebe Rexha";
        
        auto id1 = storage.insert(Entry{ 0, sameString, std::make_shared<std::string>("The way I are") });
        cout << "inserted " << storage.dump(storage.get<Entry>(id1)) << endl;
        
        //  it's ok but the next line will throw std::system_error
        
        auto id2 = storage.insert(Entry{ 0, sameString, std::make_shared<std::string>("I got you") });
        cout << "inserted " << storage.dump(storage.get<Entry>(id2)) << endl;
    } catch (std::system_error e) {
        cerr << e.what() << endl;
    }
    
    return 0;
}