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  1. Qt
  2. QTBUG-84574

QSettings does not store Null QString correct

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    • Windows

      Hello everybody,

      I need to store a QString. The QString can be a null object (i.e isNull() == true). When I store a null string with QSettings, the string is empty but not a null string. I expect that the isNull property can stored with QSettings.

      #include <QString> 
#include <QVariant> 
#include <cassert> 
#include <QSettings> 
int main(int argc, char *argv[]) 
{ 
    QString string; 
    assert(string.isNull()); // The QString is null QVariant 
    variant(string); 
    assert(variant.isNull()); 
    assert(variant.toString().isNull()); // The QVariant stores it correctly      
    QSettings settings("MyCompaniy"); 
    settings.setValue("test", variant); // I write the variant 
    variant = settings.value("test"); // I read the variant   
    assert(variant.toString().isNull()); // unexpected crash
    return 0; 
}

       

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            thiago Thiago Macieira
            fettpet Sev Dw
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              Created:
              Updated:
              Resolved:

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