refactoring: extract method to generate choices tuple from QuerySet
refactoring: extract method to generate choices tuple from QuerySet

geometalab/osmaxx,geometalab/osmaxx,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend,geometalab/osmaxx