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

<form action="{{ url_for('search') }}" method="get">

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

<form action="{{url_for('search')}}" method="get" class="navbar-form navbar-left">
            <div class="form-group">
                <input name="q" type="text" class="form-control" placeholder="请输入关键字">
            </div>
            <button type="submit" class="btn btn-default"><span class="glyphicon glyphicon-search" aria-hidden="true"></span>查找</button>
</form>

3.完成视图函数search()

获取搜索关键字

q = request.args.get('q’)

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

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)
        )
    ).order_by('-creat_time')
    return render_template('base.html',question=ques)

4.组合条件查询

from sqlalchemy import or_, and_