实现搜索功能

1. 准备视图函数search()

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

　　

2.修改base.html 中搜索输入框所在的

1. 1. <form action="{{ url_for('search') }}" method="get">
   2.    <input name="q" type="text" placeholder="请输入关键字">

      <input name='q' type="text" placeholder="请输入关键字">
                    <input type="submit" value="查找"/>

　　

3.完成视图函数search()

1. 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_

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

　　

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

        )

    )

)