old_contents: from model.mongodb import get_begin_day, get_end_day, get_entries, \
      get_after_day, get_before_day, get_spiders, get_last_aid, \
      get_first_aid, get_entries_pre, get_entries_next, \
      get_entries_spider, get_article, get_all_days, \
      get_all_articles, get_max_aid_all, get_articles, \
      check_aid, vote_article, get_categories
  
new_contents: from model.mongodb import get_begin_day, get_end_day, get_entries, \
      get_after_day, get_before_day, get_spiders, get_last_aid, \
      get_first_aid, get_entries_pre, get_entries_next, \
      get_entries_spider, get_article, get_all_days, \
      get_all_articles, get_max_aid_all, get_articles, \
      vote_article, get_categories
  
subject: remove check_aid