code: def get(self, page=0, size=10):
          
          dash_list = r_db.zrevrange(config.DASH_ID_KEY, 0, -1, True)
          id_list = dash_list[page * size : page * size + size]
          dash_meta = []
          data = []
          if id_list:
              dash_meta = r_db.hmget(config.DASH_META_KEY, [i[0] for i in id_list])
              data = [json.loads(i) for i in dash_meta]
  
          return build_response(dict(data=data, code=200))
docs: Get dashboard meta info from in page `page` and page size is `size`.
  
          Args:
              page: page number.
              size: size number.
  
          Returns:
              list of dict containing the dash_id and accordingly meta info.
              maybe empty list [] when page * size > total dashes in db. that's reasonable.