应用程序 - 在Google应用引擎上托管的Flask应用。
尝试渲染模板时出现以下错误
File "Show_Messages.html", line 1, in top-level template code
{% extends "AdminMaster.html" %}
TypeError: 'Key' object is not iterable
我的模板（Show_messages.html）
{% extends "AdminMaster.html" %}
{% block title %}News{% endblock %}
{% block page %}News{% endblock %}
{% block head %}
{{ super() }}
{% endblock %}
{% block content %}
<div class="container">
<div class="page-header">
<h1>News</h1>
</div>
<div class="col-lg-12">
<ul class="list-group">
{% for newsitem in newsitems %}
<li class="list-group-item">
<span class="badge">
<a href="Edit-NewsItem?ID={{ newsitem.key.urlsafe() }}">
<span class="glyphicon glyphicon-pencil" aria-hidden="true"></span>
</a>
</span>
</li>
{% endfor %}
</ul>
</div>
</div>
{% endblock %}
路线功能
@message_admin_routes.route('/xxxx/xxxx-xxxx')
@authenticate_admin
def show_messages():
breadcrumb, user = build_user_and_breadcrumbs()
messages = MessageFactory().get_messages_key()
return render_template('Show_Messages.html',
user=user,
breadcrumb=breadcrumb,
newsitems=messages)
------被修改---------
AdminMaster.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/html">
<head>
<!--googleoff: snippet-->
{% block head %}
<title>CFC Melbourne - {% block title %}{%endblock%}</title>
<meta name="Section" content="{% block page %}{%endblock%}">
<META NAME="ROBOTS" CONTENT="NOINDEX, NOFOLLOW">
<meta charset="UTF-8">
<link rel="stylesheet" href="https://storage.googleapis.com/xxxx/xxx/xxx.css" type="text/css">
<link rel="stylesheet" href="https://storage.googleapis.com/xxxx/xxxx/xxxx.css" type="text/css">
<link rel="shortcut icon" href="https://storage.googleapis.com/xxxx/xxxx/favicon.ico">
<link href='https://storage.googleapis.com/xxx/xxx.css' rel='stylesheet' type='text/css'>
<link href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-glyphicons.css" rel="stylesheet">
{% endblock %}
<meta name="viewport" content="width=device-width, initial-scale=1">
<script>
/**
* Function that tracks a click on an outbound link in Google Analytics.
* This function takes a valid URL string as an argument, and uses that URL string
* as the event label.
*/
var trackOutboundLink = function(url) {
ga('send', 'event', 'outbound', 'click', url, {'hitCallback':
function () {
document.location = url;
}
});
}
</script>
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
ga('create', 'xxx-xx-xx', 'xxx-xx-xx.xxx.xxx');
ga('send', 'pageview');
</script>
</head>
<body itemscope itemtype="http://schema.org/WebPage">
<div id="wrap">
<div id="menu">
<nav class="navbar navbar-default" style="margin-bottom: 0px;">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
<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="/Eden"><div class='logo-text-a' style="color: black">CFC Melbourne Admin</div></a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Applications <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="/Eden/Applications">List all applications</a></li>
<li><a href="/Eden/New-Application">Create new application</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator" class="divider"></li>
<li><a href="/Eden/Vision">Vision</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">One more separated linkkk</a></li>
</ul>
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">{{ user.nickname() }}<span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Permissions</a></li>
<li><a href="#">User Information</a></li>
<li role="separator" class="divider"></li>
<li><a href="{{ logout }}">Logout</a></li>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div>
</nav>
{% include 'AdminBreadcrumb.html' %}
</div>
<div id="content">
{% block content %}{% endblock %}
</div>
</div>
<!--googleoff: snippet-->
{% block footer %}
<script src="https://storage.googleapis.com/xxxx/js/jquery-2.1.0.min.js"></script>
<script src="https://storage.googleapis.com/xxxx/js/bootstrap.min.js"></script>
<script>
// Remove active for all items.
$('.page-sidebar-menu li').removeClass('active');
// highlight submenu item
$('li a[href="' + this.location.pathname + '"]').parent().addClass('active');
// Highlight parent menu item.
$('ul a[href="' + this.location.pathname + '"]').parents('li').addClass('active');
</script>
{% endblock%}
</body>
</html>
答案 0 :(得分：1)
在您的模板代码中，您有一个for循环，它期望像列表这样的可迭代对象。但是你在这里传递的一些物品是不可迭代的。 你需要在循环之前检查项是否可迭代。下面给出一个例子;
Append可在此处找到更多详细信息：https://stackoverflow.com/a/21006895/2336603