修改视图，判断并过滤属于哪个板块的 ``` @bp.route('/') def index(): board_id = request.args.get("board_id",type=int,default=None) boards = BoardModel.query.all() banners = BannerModel.query.order_by(BannerModel.priority.desc(),BannerModel.create_time.desc()).limit(4) # posts = PostModel.query.all() page = request.args.get(get_page_parameter(),type=int,default=1) offset = (page-1) * config.PER_PAGE count = offset + config.PER_PAGE # 从第几条开始显示第end条数据 # posts = PostModel.query.slice(offset,count) posts = None total = 0 if board_id: query_obj = PostModel.query.filter_by(board_id=board_id) posts = query_obj.slice(offset,count) total = query_obj.count() else: posts = PostModel.query.slice(offset,count) total = PostModel.query.count() # 传入页数参数，数据的总条数 pagination = Pagination(bs_version=3,page=page,total=total,outer_window=0,inner_window=2) context = { "boards":boards, "banners":banners, 'posts':posts, 'pagination':pagination, 'current_board':board_id, } return render_template("front/index.html",**context) ``` 前端中判断是否被选中 ``` <div class="list-group"> {% if current_board %} <a href="/" class="list-group-item">所有版块</a> {% else %} <a href="/" class="list-group-item active">所有版块</a> {% endif %} {% for board in boards %} {% if board.id == current_board %} <a href="{{ url_for("front.index",board_id = board.id) }}" class="list-group-item active">{{ board.name }}</a> {% else %} <a href="{{ url_for("front.index",board_id = board.id) }}" class="list-group-item">{{ board.name }}</a> {% endif %} {% endfor %} ```