实现搜索功能

1、准备视图函数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">

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




 <form action="{{ url_for(‘search‘) }}" method="get" class="navbar-form navbar-left">
   <input name="q" type="text" class="form-control" placeholder="请输入关键字">

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）

@app.route(‘/search/‘)
def search():
  qu = request.args.get(‘q‘)
  wen = Question.query.filter(Question.title.contains(qu)).order_by(‘-creat_time‘)
  return render_template(‘moban.html‘,wenda=wen)

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‘)
  wen = Wenda.query.filter(
      or_(
          Wenda.title.contains(qu),
          Wenda.detail.contains(qu)
      )
  ).order_by(‘-creat_time‘)
  return render_template(‘moban.html‘,wenda=wen)