def _select_iterables(elements):
    return itertools.chain(*[c._select_iterable for c in elements])
Regression test for #8842: FilePathField(blank=True)
dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/sql/elements.py/_select_iterables--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/tests/regressiontests/model_forms_regress/tests.py/FilePathFieldTests.test_file_path_field_blank