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

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

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

<form action="{{ url_for(‘search‘)}}" method="get" class="navbar-form navbar-left">
    <input name="q" type="text" name="title" required lay-verify="required" placeholder="请输入搜索内容" autocomplete="off"
           class="layui-input">

3.完成视图函数search()

  a.获取搜索关键字
     q = request.args.get(‘q’)

  b.条件查询
     qu = Question.query.filter(Question.title.contains(q)).order_by(‘-creat_time’)

  c.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)
        )
    )
    return render_template(‘base.html‘,questions=ques)

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

from sqlalchemy import or_
ques = Question.query.filter(
        or_(
        Question.title.contains(qu),
        Question.detail.contains(qu)
        )
    )

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