Flask实战第65天：帖子按照发布时间和评论数量等排序

Posted 2021-01-11 sellsa

 

排序，我们需要在前端传递参数， 编辑front_index.html

编辑front.views.py

from apps.models import HighlightPostModel
from sqlalchemy.sql import func
...


@bp.route(‘/‘)
def index():
    banners = BannerModel.query.order_by(BannerModel.priority.desc()).all()
    boards = BoardModel.query.all()

    # 当前页面
    page = request.args.get(get_page_parameter(), type=int, default=1)
    # 开始位置
    start = (page - 1) * config.PER_PAGE
    # 结束位置
    end = start + config.PER_PAGE

    board_id = request.args.get(‘bd‘,type=int, default=None)
    sort = request.args.get("st", type=int, default=1)
    query_obj = None
    if sort == 1:
        query_obj = PostModel.query.order_by(PostModel.create_time.desc())
    elif sort == 2:
        # 按照加精的时间倒叙排序
        query_obj = db.session.query(PostModel).outerjoin(HighlightPostModel).order_by(
            HighlightPostModel.create_time.desc(), PostModel.create_time.desc())
    elif sort == 3:
        # 按照点赞的数量排序,点赞功能没有做，所以这里用时间倒序排序
        query_obj = PostModel.query.order_by(PostModel.create_time.desc())
    elif sort == 4:
        # 按照评论的数量排序
        query_obj = db.session.query(PostModel).outerjoin(CommentModel).group_by(PostModel.id).order_by(
            func.count(CommentModel.id).desc(), PostModel.create_time.desc())

    if board_id:
        query_obj = query_obj.filter(PostModel.board_id == board_id)
        posts = query_obj.slice(start, end)
        total = query_obj.count()
    else:
        posts = query_obj.slice(start, end)
        total = query_obj.count()

    pagination = Pagination(bs_version=3,page=page, total=total)
    context = {
        ‘banners‘: banners,
        ‘boards‘: boards,
        ‘posts‘: posts,
        ‘pagination‘: pagination,
        ‘current_board‘: board_id,
        ‘current_sort‘: sort
    }
    return render_template(‘front/front_index.html‘, **context)

front.views.py

排序 功能已经完成了

但是选中的状态样式还没有改，修改front_index.html