signals.py 文件源码

def register_signal_handlers():
    """Registers signal handlers.

    To create a signal for TranslatablePage we have to use wagtails
    get_page_model.

    """
    post_save.connect(create_language_permissions_and_group, sender=Language)
    init_new_page.connect(force_parent_language)
    if get_wagtailtrans_setting('SYNC_TREE'):
        if get_wagtailtrans_setting('LANGUAGES_PER_SITE'):
            m2m_changed.connect(
                update_language_trees_for_site,
                sender=SiteLanguages.other_languages.through)
        else:
            post_save.connect(create_new_language_tree, sender=Language)

        for model in get_page_models():
            if hasattr(model, 'create_translation'):
                post_save.connect(synchronize_trees, sender=model)

            if hasattr(model, 'get_translations'):
                pre_delete.connect(synchronize_deletions, sender=model)