// file : schema/custom/driver.cxx // author : Boris Kolpackov <boris@codesynthesis.com> // copyright : not copyrighted - public domain #include <memory> // std::auto_ptr #include <iostream> #include <odb/database.hxx> #include <odb/session.hxx> #include <odb/transaction.hxx> #include "database.hxx" // create_database #include "employee.hxx" #include "employee-odb.hxx" using namespace std; using namespace odb::core; int main (int argc, char* argv[]) { try { auto_ptr<database> db (create_database (argc, argv)); // Create the database schema. // { transaction t (db->begin ()); // Try to drop the tables if they exist and ignore the error // if they don't. // try { db->execute ("DROP TABLE Employer"); db->execute ("DROP TABLE Employee"); db->execute ("DROP TABLE EmployeeDegree"); } catch (const odb::exception&) { } db->execute ( "CREATE TABLE Employer (" "name VARCHAR (255) NOT NULL PRIMARY KEY)"); db->execute ( "CREATE TABLE Employee (" "ssn INTEGER UNSIGNED NOT NULL PRIMARY KEY," "first_name VARCHAR (255) NOT NULL," "last_name VARCHAR (255) NOT NULL," "employer VARCHAR (255) NOT NULL REFERENCES Employer (name))"); db->execute ( "CREATE TABLE EmployeeDegree (" "ssn INTEGER UNSIGNED NOT NULL REFERENCES Employee (ssn)," "degree VARCHAR (255) NOT NULL)"); t.commit (); } // Create a few persistent objects. // { shared_ptr<employer> st (new employer ("Simple Tech Ltd")); shared_ptr<employee> john (new employee (1, "John", "Doe", st)); shared_ptr<employee> jane (new employee (2, "Jane", "Doe", st)); john->degrees ().push_back ("BA"); john->degrees ().push_back ("MSc"); jane->degrees ().push_back ("Ph.D."); transaction t (db->begin ()); db->persist (st); db->persist (john); db->persist (jane); t.commit (); } // Load employees with "Doe" as the last name and print what we've got. // { typedef odb::query<employee> query; typedef odb::result<employee> result; session s; transaction t (db->begin ()); result r (db->query<employee> (query::name::last == "Doe")); for (result::iterator i (r.begin ()); i != r.end (); ++i) { cout << i->name ().first () << " " << i->name ().last () << endl << " employer: " << i->employer ()->name () << endl; for (degrees::iterator j (i->degrees ().begin ()); j != i->degrees ().end (); ++j) { cout << " degree: " << *j << endl; } cout << endl; } t.commit (); } } catch (const odb::exception& e) { cerr << e.what () << endl; return 1; } }