实现搜索功能

1、准备视图函数search()

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

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" role="search">
        <div class="form-group">
            <input type="text" name="q" placeholder="请输入关键字" class="search-input" class="form-control"/>
        </div>
        <button type="submit" class="btn btn-default">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(Question.title.contains(qu).order_by('-creat_time')
    return render_template('admin.html', question=ques)

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

@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('admin.html', question=ques)