I am using here mysql but show the error in header file.
Wt/Dbo/backend/Mysql: No such file or directory
compilation terminated.
#define MYSQL
#include <string>
//#include <boost/lexical_cast.hpp>
#include <Wt/WApplication>
#include <Wt/WContainerWidget>
#include <Wt/Dbo/Dbo>
#include <Wt/WDateTime>
#include <Wt/WText>
#include <Wt/WBreak>
#ifdef MYSQL
#include <Wt/Dbo/backend/Mysql>
#endif
using namespace std;
using namespace Wt;
using namespace Wt::Dbo;
class A;
class B;
typedef ptr<A> ptrA;
typedef ptr<B> ptrB;
typedef collection< ptrA > colA;
typedef collection< ptrB > colB;
class A {
public:
//Wt::WDateTime date;
std::string date;
colB Bs;
template<class Action>
void persist(Action& a) {
field(a, date, "dat");
hasMany(a, Bs, ManyToMany, "a_b");
}
};
class B {
public:
std::string date;
colA As;
template<class Action>
void persist(Action& a) {
field(a, date, "dat");
hasMany(a, As, ManyToMany, "a_b");
}
};
/*
class AB {
public:
int b_id;
int a_id;
template<class Action>
void persist(Action& a) {
field(a, b_id, "b_id");
field(a, a_id, "a_id");
}
};
*/
class WtApplication : public WApplication {
private:
#ifdef MYSQL
backend::Mysql connection_;
#endif
Session session_;
void msg(string str);
void populate();
void lists();
void listAB(int id);
public:
WtApplication(const WEnvironment& env);
};
WtApplication::WtApplication(const WEnvironment& env) : WApplication(env),
#ifdef MYSQL
connection_("host=localhost user=root password=parvinder port=3306
dbname=test")
#endif
{
msg("<b>N-M Relationship</b>");
connection_.setProperty("show-queries", "true");
session_.setConnection(connection_);
session_.mapClass<A>("a");
session_.mapClass<B>("b");
//session_.mapClass<AB>("a_b");
try { Transaction tt(session_);
session_.createTables();
tt.commit();
} catch (Exception &e) { cerr << "Exception: " << e.what() << endl; }
populate();
lists();
listAB(1);
}
void WtApplication::msg(string str) {
root()->addWidget(new WText(str));
root()->addWidget(new WBreak());
}
void WtApplication::populate() {
msg("<b>Populate</b>");
ptrA a;
{ A *tuple = new A();
//tuple->date = WDateTime::currentDateTime();
tuple->date = "A: " +
WDateTime::currentDateTime().toString("dd/MM/yy HH:mm:ss").toUTF8();
try { Transaction tt(session_);
a = session_.add(tuple);
tt.commit();
} catch (...) {}
}
{ B *tuple = new B();
tuple->date = "B: " +
WDateTime::currentDateTime().toString("dd/MM/yy HH:mm:ss").toUTF8();
try { Transaction tt(session_);
ptrB b = session_.add(tuple);
a.modify()->Bs.insert(b);
tt.commit();
} catch (...) {}
}
}
void WtApplication::lists() {
msg("<b>List All As:</b>");
try {
Transaction tt(session_);
colA collect = session_.find<A>();
for (colA::const_iterator i = collect.begin(); i != collect.end();
++i)
msg((*i)->date);
tt.commit();
} catch (...) {}
msg("<b>List All Bs:</b>");
try {
Transaction tt(session_);
colB collect = session_.find<B>();
for (colB::const_iterator i = collect.begin(); i != collect.end();
++i)
msg((*i)->date);
tt.commit();
} catch (...) {}
}
void WtApplication::listAB(int id) {
msg("<b>List Bs From A: " + boost::lexical_cast<string>(id) + "</b>");
try {
Transaction tt(session_);
ptrA a = session_.find<A>().where("id = ?").bind(id);
colB collect = a->Bs;
for (colB::const_iterator i = collect.begin(); i != collect.end();
++i)
msg((*i)->date);
tt.commit();
} catch (...) {}
msg("<b>List As From B: " + boost::lexical_cast<string>(id) + "</b>");
try {
Transaction tt(session_);
ptrB b = session_.find<B>().where("id = ?").bind(id);
colA collect = b->As;
for (colA::const_iterator i = collect.begin(); i != collect.end();
++i)
msg((*i)->date);
tt.commit();
} catch (...) {}
}
WApplication *createApplication(const WEnvironment& env) { return new
WtApplication(env); }
int main(int argc, char **argv) { return WRun(argc, argv,
&createApplication); }
error in mysql :
Scanning dependencies of target test.wt
[100%] Building CXX object source/CMakeFiles/test.wt.dir/test.cpp.o
/home/parvinder/Desktop/web/source/test.cpp:31:32: fatal error:
Wt/Dbo/backend/Mysql: No such file or directory
compilation terminated.
make[2]: *** [source/CMakeFiles/test.wt.dir/test.cpp.o] Error 1
make[1]: *** [source/CMakeFiles/test.wt.dir/all] Error 2
make: *** [all] Error 2
please help me.
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