def test_serialization_to_simple_dict(self): class CM(ComplexModel): i = Integer s = String class CCM(ComplexModel): c = CM i = Integer s = String val = CCM(i=5, s='a', c=CM(i=7, s='b')) d = FlatDictDocument().object_to_flat_dict(CCM, val) assert d['i'] == 5 assert d['s'] == 'a' assert d['c_i'] == 7 assert d['c_s'] == 'b' assert len(d) == 4