By default QSortFilterProxyModel can sort few different types using QVariant::type to see what is in it to do the correct sort. However when the QSqlTableModel as a source model for the proxy then this always evaluates to QString (the default) and thus sorting numbers as strings. I wrote my own subclass of the filter model to force sorting by number but I wonder if there is a way to tell the QSortFilterProxyModel by what type it should sort explicitly? I am pretty sure that the problem is with QSqlTableModel disregarding the types of fields in the database (or QSqlQuery/QSqlDatabase behind it).
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