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
        )
    )
)

@app.route("/search/")
def search():
    t = request.args.get("tri")
    tri = Trip.query.filter(or_(Trip.ttitle.contains(t), Trip.feeling.contains(t))).order_by('-creat_time')
    return render_template("first.html",visit = tri)

<form action="{{ url_for('search') }}">
        <div class="daohang pailie">
            <input class="sousuo" id="sousuo" type="text" placeholder="搜索" name="tri">
            <button type="submit" ><img src="../static/image/fdj.png" width="15px"></button>
        </div>
    </form>