cannot use operator[] with a string argument with number

[nagayev]

nlohmann::json jsonData = nlohmann::json::object();
std::string nameS = examinationName->text().toStdString();
jsonData["name"]=nameS;
jsonData["unixTime"]=time(NULL);

Type of jsonData is number (jsonData.type_name)
Compiler: MSVC from VS 2022
What is wrong?

[PatchByte]

I don't know particularly where the error should be but you could try using this code:

    nlohmann::json jsonData = nlohmann::json();
    std::string nameS = examinationName->text().toStdString();
    jsonData["name"] = nameS;
    jsonData["unixTime"] = (unsigned long long) ::time(NULL);

[falbrechtskirchinger]

What's your exact error message? This code compiles without errors:

nlohmann::json jsonData = nlohmann::json::object();
jsonData["unixTime"]=time(NULL);