Using g_value_get_*

Using GValue related function is quite tricky. It is not working if you do

GdaDataModel *dm;
gint i;
i = g_value_get_int ( gda_data_model_get_value_at (dm, 0, 0));

For upcomming Version 4.0 (the main difference is at GdaDataModel API)

GdaDataModel *model;
const GValue *integer;
GError *error = NULL;
integer = gda_value_new (G_TYPE_INT);
integer = gda_data_model_get_value_at  (model, 0, 0, &error);

All values in a Data Model must be unmodificable then use const GValue, this will avoid compilation warnings. Or can use (gda_value_new makes this for you :-)

integer = g_new0 (GValue. 1);
g_value_init (inteteger, G_TYPE_INT);

Thanks to Daniel Espinosa