实现搜索功能

准备视图函数search()

修改base.html 中搜索输入框所在的

1. <form action="{{ url_for('search') }}" method="get">

   <input name="q" type="text" placeholder="请输入关键字">

<form method="get" action="{{ url_for('search') }}">
 <div style="position: absolute;top: 24px;left:20%;">
    <input id="keyword" type="text"  name="q"  placeholder="请输入关键字">
       <button type="submit" >搜索</button>
</div>
   </form>

完成视图函数search()

获取搜索关键字
q = request.args.get('q’)

条件查询
qu = Question.query.filter(Question.title.contains(q)).order_by('-creat_time’)

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')
    print('fdr')
    ques=Question.query.filter(
        or_(Question.title.contains(qu),
            Question.detail.contains(qu)
            )).order_by('create_time')

    return render_template('shouye.html', question=ques)