[Cppcms-users] How to avoid "Access to unassigned context"

[Marcel H. <ke...@co...>]

Good morning,

I'm writing a program that uses sessions. Here's my config:

"session" : {
     "location" : "server",
     "timeout" : 3600, //1 hour
     "expire" : "renew",
     "cookies" : {
//    "domain" : "localhost",
       "path"   : "/",
       "prefix" : "bg_",
       "secure" : false,
     },
     "server" : {
       "storage" : "files",
       "dir"      : "tmp/cookies",
       "shared"  : false,
     },
     "gc" : 86400 //once a day
},

now my problem.
I'm using the dispatcher, there I assign the "fill" method, named 
prepare. Everything works until now. In this "fill" method i declare a 
new pointer to an Object and give this pointer to an other method, named 
"fillContent". There i use some methods from the "pointed-Object". In 
that object I have to, or I want to the session. That for the 
Constructor of the Object becomes the cppcms::application reference.
Now I try to set, or to read a cookie. Both fails with the error "Access 
to unassigned context". If i remove that "session-line" everything works 
back to normal.

Please, give me some advices.

Regards,
Marcel Hellwig
Hamburg, Germany



Here some code:

Dispatcher::Dispatcher(cppcms::service &s) : cppcms::application(s) {
.....
     attach(new Techtree(s),
            "Techtree",
            "/techtree/{1}",
            "/techtree/?(.*)", 1);
.....
}

Techtree::Techtree(cppcms::service& srv) : BasePage(srv) {
     mapper().assign("{1}");
     mapper().assign("");
     dispatcher().assign(".*", &Techtree::prepare, this, 0);
}

void Techtree::prepare(std::string /*page*/) {
     User* user;
......
     user = new User(_srv, session().get<int>("uID"));
......
     session().set("uID", "1"); //this works!
.....
     fillContent(c, user); //c is the struct of template strings
     delete user;
}

void Techtree::fillContent(data::techtree::main c, User* user) {

     c.MetalMineDep = "<tr><td>---</td></tr>";
     user->getBuildingLevel(101, 1);
     c.SolarPowerPlantDep = "<tr><td>---</td></tr>";
     render("techtree", c);
}

User::User(cppcms::service& srv, int id) : cppcms::application(srv),
         _srv(srv), _userID(id) {
     _conn_str = _srv.settings().get<std::string>("bg.connection_string");
     _sql.open(_conn_str);
     _init();
}

void User::_init() {
   ........
     session().set("test, "test123"); //here the error occurs
}