@classmethod
def make_all_available_to_issue(cls, issue):
    """Make all ScheduledPosts scheduled to be published on
        `issue`.pub_date available for inclusion in `issue`.
        """
    available_posts = []
    for scheduled_post in cls.objects.filter(pub_date=issue.pub_date):
        post = scheduled_post.make_available_to_issue(issue)
        if post:
            available_posts.append(post)
    return available_posts
