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