实现搜索功能

1. 准备视图函数search()

   # 搜索框带参数搜素显示在首页
   @app.route('/search/')
   def search():

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">
              <li><input type="text" class="form-control" id="q" name="q" placeholder="音乐搜索，找人"></li>
              <li><button type="submit" class="btn btn-default" style="margin-top: 5px">搜索</button></li>
          </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）
      

      # 搜索框带参数搜素显示在首页
      @app.route('/search/')
      def search():
          qu=request.args.get('q')
          ques=Question.query.filter(Question.title.contains(qu).order_by('-time')
          return render_template('index.html',questions=ques)

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

# 搜索框带参数搜素显示在首页
@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('-time')
    return render_template('index.html',questions=ques)

首页，所有问答

搜素标题，所出现的

搜索‘hi’，出现两条结果，其中包括了标题跟内容

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

        )

    )

)

https://stackoverflow.com/questions/13370993/sqlalchemy-query-and-or-issue