作业36-实现搜索功能

1. 准备视图函数search()

@app.route('/search/')
def search():
  pass

1. 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">
      
      

<li>
        <form action="{{url_for('search') }}" method="get"   >
        <input class="sea" name="q" type="text" placeholder="请输入关键字">
        <button class="btn btn-default" type="submit">搜索</button> </form>

</li>

1. 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）

1. 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():
    qu = request.args.get('q')
    ques = Sent.query.filter(
        or_(
            Sent.title.contains(qu),
            Sent.detail.constraints(qu)
            )
    ).order_by('creat_time')
    return render_template('shouye.html', username=ques)