def get_queryset(self, value, row, *args, **kwargs):
return self.model.objects.all()<EOL>
Returns a queryset of all objects for this Model.

Overwrite this method if you want to limit the pool of objects from
which the related object is retrieved.

:param value: The field's value in the datasource.
:param row: The datasource's current row.

As an example; if you'd like to have ForeignKeyWidget look up a Person
by their pre- **and** lastname column, you could subclass the widget
like so::

    class FullNameForeignKeyWidget(ForeignKeyWidget):
        def get_queryset(self, value, row):
            return self.model.objects.filter(
                first_name__iexact=row["first_name"],
                last_name__iexact=row["last_name"]
            )