在Jinja2/Werkzeug中渲染python字典 [英] Rendering a python dict in Jinja2 / Werkzeug

问题描述

我正在使用URL缩短器(基于Werkzeug的Shortly演示应用程序为基础).

I'm playing with a url shortener (basing it on the Shortly demo app from Werkzeug).

我有这样的字典-

('1', {'target': 'http://10.58.48.103:5000/', 'clicks': '1'})
('3', {'target': 'http://slash.org', 'clicks': '4'})
('2', {'target': 'http://10.58.48.58:5000/', 'clicks': '1'})
('5', {'target': 'http://de.com/a', 'clicks': '0'})

在url_list中返回并由render_template使用

which is returned in url_list and used by render_template

def on_list_urls(self, request):
    url_list = self.get_urls()
    return self.render_template('list_urls.html',
        url_list = url_list
    )

模板list_urls非常简单-

the template list_urls is pretty simple -

{% extends "layout.html" %}
{% block title %}List URLs{% endblock %}
{% block body %}
  <h2>List URLs</h2>
  <ul id="items">
  {% for item in url_list %}
    <li>{{ item }}</li>
  {% endfor %}
  </ul>

{% endblock %}

事实是，我似乎无法访问字典中的项目.

Thing is, I can't seem to access the items in the dict.

行

<li>{{ item }}</li>

是我关注的重点.如上所述，我获得了字典中键的列表.

is where I'm focussing attention. As above, I get a list of the keys in the dict.

<li>{{ item["target"] }}</li>

不返回任何内容.没有任何一个 {{user.url}}> {{user.username}} 在文档中输入内容似乎可行.

returns nothing. None of the {{ user.url }}">{{ user.username }} type stuff in the docs seems to work.

好吗?新手-温柔.谢谢.

Ideas please? Newbie - be gentle. Thanks.

更新

感谢您的答复.

Ewan的答案有效，但使用了一系列词典.我想传递一个字典并将其呈现(因为我想要一个非整数的项目索引). Jinja会这样做吗?

Ewan's answer works, but uses a list of dicts. I want to pass a dict and render that (because I want a non-integer index of items). Does Jinja do that?

也-我误输入了url_list.更像这样-

Also - I mis-represented url_list. It's more like this -

{'a': {'target': 'http://testing.com/test', 'clicks': '0'}, 
'1': {'target': 'http://10.58.48.103:5000/', 'clicks': '1'}, 
'3': {'target': 'http://slash.org', 'clicks': '4'}, 
'2': {'target': 'http://10.58.48.58:5000/', 'clicks': '1'}}

进一步的实验-传递字典会产生有关列表对象的错误.

Further experimentation - passing a dict produces an error about a list object.

{% for key in url_list.iteritems() %}

UndefinedError:列表对象"没有属性"iteritems"

UndefinedError: 'list object' has no attribute 'iteritems'

再次感谢.

仍然困惑为什么它认为我正在通过一个列表，但是现在让它可以正常工作.

Still baffled by why it thought I was passing a list but got it working now.

{% for key, value in url_list.iteritems() %}
    <li>{{ key }} - {{ value["target"] }} - {{ value["clicks"] }}</li>

打印出所有内容.非常感谢.

prints out everything. Many thanks.

推荐答案

您的url_list应该看起来像这样:

Your url_list should look like this:

url_list = [{'target': 'http://10.58.48.103:5000/', 'clicks': '1'}, 
            {'target': 'http://slash.org', 'clicks': '4'},
            {'target': 'http://10.58.48.58:5000/', 'clicks': '1'},
            {'target': 'http://de.com/a', 'clicks': '0'}]

然后使用:

<li>{{ item["target"] }}</li> 

在您的模板中可以使用.

in your template will work.

您的模板认为您正在传递列表，那么您确定传递的是您的原始字典而不是我上面的列表吗?

Your template think you're passing a list in, so are you sure you're passing in your original dict and not my above list?

此外，您还需要在字典中同时访问key和value(当您传递字典而不是列表时):

Also you need to access both a key and a value in your dictionary (when you're passing a dictionary rather than a list):

Python 2.7

{% for key, value in url_list.iteritems() %}
    <li>{{ value["target"] }}</li> 
{% endfor %}

Python 3

{% for key, value in url_list.items() %}
    <li>{{ value["target"] }}</li> 
{% endfor %}

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