实现搜索功能

1.准备视图函数search()

# 模糊查找
@app.route('/search', methods=['GET', 'POST'])
def search():
    qu = request.args.get('q')
    query = Book.query.filter(
        or_(
            Book.title.contains(qu),
            Book.content.contains(qu),
        )
     ).order_by('-createdate').all()
    classfly = Classification.query.all()
    context = {
        'books': query,
        'classfly':classfly
    }
    return render_template('home.html', **context)

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 method="get" action="{{ url_for('search') }}">
                                <div class="layui-row">
                                    <div class="layui-col-md3" style="padding-left: 10px;">
                                        <input type="text" name="q" required lay-verify="required"
                                               placeholder="请输入搜索内容"
                                               autocomplete="off" class="layui-input">
                                    </div>
                                    <div class="layui-col-md3" style="padding-left: 10px;">
                                        <button type="submit" class="layui-btn layui-btn-primary">搜索</button>
                                    </div>
                                </div>
                            </form>

 

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

https://stackoverflow.com/questions/13370993/sqlalchemy-query-and-or-issue

query = Book.query.filter(
        or_(
            Book.title.contains(qu),
            Book.content.contains(qu),
        )
     ).order_by('-createdate').all()

搜索python:

　　

搜索Python结果：