实现搜索功能

1.准备视图函数search()

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

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">

 <form action="{{ url_for('search') }}" method="get">
            <div>
                <button type="submit" class="search"><img src="{{ url_for('static',filename='images/search.gif') }}"  ></button>
                <input type="text" style="padding-left: 10px;width: 250px" name="q" PLACEHOLDER="输入要搜索的内容">
            </div>
        </form>

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():
    qu=request.args.get('q')
    ques=Question.query.filter(
        or_(
            Question.title.contains(qu),
            Question.detail.contains(qu)
        )
    ).order_by('-creatTime')
    return render_template('shouye.html',question=ques)