@classmethod
    def create(cls, exploration_id, thread_id):
        instance_id = cls.generate_full_thread_id(exploration_id, thread_id)
        if cls.get_by_id(instance_id):
            raise Exception('Feedback thread ID conflict on create.')
        return cls(id=instance_id)
Checks if a database exists on the Postgres server.
dataset/ETHPy150Open oppia/oppia/core/storage/feedback/gae_models.py/FeedbackThreadModel.create--crossover with--dataset/ETHPy150Open saltstack/salt/salt/modules/postgres.py/db_exists