def describe_mismatch(self, item, mismatch_description):
        mismatch_description.append('Was object with effects {0}'
                                    .format(item.get_effects()))
SQLite3 doesn't support constraints
dataset/ETHPy150Open tuturto/pyherc/src/pyherc/test/matchers/active_effects.py/EffectInstance.describe_mismatch--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/db/backends/sqlite3/creation.py/DatabaseCreation.sql_for_pending_references