实现搜索功能(2017.12.19)

2 修改base.html 中搜索输入框所在的

<form action="{{ url_for(‘search‘) }}" method="get">

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

 <form action="{{ url_for(‘search‘)}}" method="get" class="navbar-form navbar-left" role="search">
                <div class="form-group">
                    <input type="text"  id="q" name="q" autocomplete="off" placeholder="搜索" class="search-input" data-mounted="1">

1 准备视图函数search()

3 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）

@app.route(‘/search/‘)
def search():
    qu=request.args.get(‘q‘)
    ques=Question.query.filter(
        or_(
            Question.title.contains(qu),
            Question.detail.contains(qu)
        )
    ).order_by(‘-creat_time‘)
    return render_template(‘shouye.html‘,questions=ques)

4 组合条件查询from sqlalchemy import or_, and_

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

        )

    )

)

结果如下：