Python Flask: 实现编辑笔记功能（无数据库版）
来自CloudWiki
代码
# 编辑笔记
@app.route('/edit_article/<string:id>', methods=['GET', 'POST'])
@is_logged_in
def edit_article(id):
article={}
with open('sample.csv',"r") as fr:
for line in fr: #文件对象可以直接迭代
#print(line)
r = line.split(",")
if r[0] !=id:
continue
else:
#9,ansible学习,zhangsan,2022-12-30 16:52:59,ansible是一个有用技术
article['id']= r[0];article['title']=r[1];article['author']=r[2];article['update_date']=r[3];
article['content']=r[4]
break;
# 检测笔记不存在的情况
if not article:
flash('ID错误', 'danger') # 闪存信息
return redirect(url_for('dashboard'))
# 获取表单
form = ArticleForm(request.form)
if request.method == 'GET':
# 从数据库中获取表单字段的值
form.title.data = article['title']
form.content.data = article['content']
return render_template('edit_article.html', info=form) # 渲染模板
elif request.method == 'POST':# 如果用户提交表单，并且表单验证通过
# 获取表单字段内容
#9,ansible学习,zhangsan,2022-12-30 16:52:59,ansible是一个有用技术
with open('sample.csv',"r") as fr:
line_list = fr.readlines()
for i in range(0,len(line_list)): #文件对象可以直接迭代
#print(line)
r = line_list[i].split(",")
if r[0] !=id:
continue
else:
r[1] = form.title.data
r[2] = session['username']
r[3] = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
r[4] = form.content.data
line_list[i] = ",".join(r)
break;
with open('sample.csv',"w") as fw:
fw.writelines(line_list)
#fw.write("123")
flash('更新成功', 'success') # 闪存信息
return redirect(url_for('dashboard')) # 跳转到控制台
模板
edit_article.html：
<html>
<head>
<meta charset="utf-8">
<title>读书笔记</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="/static/css/style.css">
<script src="https://cdn.bootcss.com/jquery/2.2.4/jquery.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<nav class="navbar navbar-default">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="/">学习笔记</a>
</div>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li><a href="/">主页</a></li>
<li><a href="/articles">笔记</a></li>
<li><a href="/about">关于</a></li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li><a>欢迎 {{session.username}}</a></li>
<li><a href="/logout">退出</a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>
<div class="container">
<h1>编辑笔记</h1>
<form method="POST" action="">
<div class="form-group">
<label>标题</label>
<input type="text" name="title" class="form-control" value="{{info.title.data}}">
</div>
<div class="form-group">
<label>内容</label>
<input type="text" name="content" class="form-control content-text" value="{{info.content.data}}" id="editor">
</div>
<p><input class="btn btn-primary" type="submit" value="提交">
</form>
<script src="//cdn.ckeditor.com/4.11.2/standard/ckeditor.js"></script>
<script type="text/javascript">
<!-- CKEDITOR.replace( 'editor') -->
</script>
</div>
<!-- Footer -->
<footer class="page-footer font-small blue" style="margin-top: 50px">
<!-- Copyright -->
<div class="footer-copyright text-center py-3">
Copyright ©2007-2019 <a href="http://www.mingrisoft.com">明日科技有限公司</a>
All Rights Reserved 吉ICP备10002740号-2 吉公网安备22010202000132
</div>
<!-- Copyright -->
</footer>
<!-- Footer -->
</body>
</html>
