实现搜索功能

1. 准备视图函数search()
2. 修改base.html 中搜索输入框所在的
   1. <form action="{{ url_for(‘search‘) }}" method="get">
   2.    <input name="q" type="text" placeholder="请输入关键字">
      
      
3. 完成视图函数search()
   1. 获取搜索关键字
      q = request.args.get(‘q’)
   2. 条件查询
      qu = Question.query.filter(Question.title.contains(q)).order_by(‘-creat_time’)
   3. 加载查询结果：
      return render_template(‘index.html‘, question=qu）
      
      
4. 组合条件查询
   from sqlalchemy import or_, and_

示例：

Lobby.query.filter(

    or_(

        and_(

            Lobby.id == Team.lobby_id,

            LobbyPlayer.team_id == Team.id,

            LobbyPlayer.player_id == player.steamid

        ),

      and_(

            Lobby.id == spectator_table.c.lobby_id,

            spectator_table.c.player_id == player.steamid

        )

    )

)

https://stackoverflow.com/questions/13370993/sqlalchemy-query-and-or-issue

py文件：

from sqlalchemy import or_

@app.route("/search")
def search():
    q=request.args.get("q")
    tg=Tougao.query.filter(
        or_(
            Tougao.title.contains(q),
            Tougao.content.contains(q)
        )
    ).order_by("-time")
    return render_template("index.html",touGao=tg)

html(base):

        <form class="navbar-form navbar-right" role="search" action="{{ url_for("search") }}" method="get">

            <div class="form-group">
                <input type="text" class="form-control" name="q" placeholder="Search">
            </div>
            <button type="submit" class="btn btn-default">
                搜索
            </button>
        </form>