ComboBox with QSqlTableModel

[jpn]

May I ask how did you find out QComboBox::currentIndexChanged()? From docs? There is also QComboBox::currentIndex() and QComboBox::setCurrentIndex()..

int idx = comboBox_city->currentIndex();

int idx = comboBox_city->currentIndex();

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[mkarakaplan]

I didn't find from docs. It is too complex just for me now. I asked here in the newbie forum and someone helped me.
I am just trying to make a real application from QtDemos with model->copyPaste for now.
I developed this solution. It took my two hours.

QVariant city_id = cityModel->data(cityModel->index(comboBox_City->currentIndex(),0) );

[jpn]

No worries, luckily the documentation of Qt is great! A special application, Qt Assistant is provided together with Qt. The "index" tab of Qt Assistant is awesome. Just try to write for example "currentIndex" into index-tab and you'll see. Oh, and the same documentation also available online.