RSS源中缺少更新日期

Question

Django 3.0.8

提要.py

class RssFeed(Feed):
title = "Pcask.ru: все о компьютерах, гаджетах и программировании."
link = get_site_address()
description = "Новости, статьи, фотографии, видео о компьютерах и программировании."
def items(self):
# All evergreen posts and fresh news (just exclude old news).
# Django taggit doesn't support excluding, only filtering. (https://django-taggit.readthedocs.io/en/latest/api.html#filtering)
# Therefore we have to exclude items via an id list.
excluded_items = Post.published.filter(tags__slug__in=[SPECIAL_TAGS.NEWS.value],
updated__lte=timezone.now()-timedelta(days=NEWS_LIFESPAN))
return Post.published.exclude(id__in=get_id_list(excluded_items))[:NUMBER_OF_ITEMS]

def item_title(self, item):
return item.title
def item_description(self, item):
return item.description
def item_categories(self, item):
return (item.category.title,)
feed_copyright = 'Все права защищены (c) {}, {}'.format(timezone.now().year,
get_site_address())
def item_enclosure_url(self, item):
featured_image = item.get_featured_image()
img_field = getattr(featured_image, ENCLOSURE_WIDTH)
enclosure_url = img_field.url
return enclosure_url
def item_enclosure_mime_type(self, item):
featured_image = item.get_featured_image()
img_field = getattr(featured_image, ENCLOSURE_WIDTH)
_, ext = img_field.name.split(".")
mime_type = get_mime_type(ext)
return mime_type
def item_enclosure_length(self, item):
featured_image = item.get_featured_image()
img_field = getattr(featured_image, ENCLOSURE_WIDTH)
return img_field.size
def item_pubdate(self, item):
return item.created
def item_updateddate(self, item):
return item.updated

生成的馈送(带有测试数据(

<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0"
xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<title>Pcask.ru: все о компьютерах, гаджетах и программировании.</title>
<link>http://localhost:8000</link>
<description>Новости, статьи, фотографии, видео о компьютерах и программировании.</description>
<atom:link href="http://localhost:8000/rss/" rel="self"></atom:link>
<language>ru-RU</language>
<copyright>Все права защищены (c) 2020, </copyright>
<lastBuildDate>Mon, 13 Jul 2020 00:00:00 +0000</lastBuildDate>
<item>
<title>6ffd0cc4-c4cb-11ea-b89d-5404a66bf801</title>
<link>http://localhost:8000/linux/6ffd0cc4-c4cb-11ea-b89d-5404a66bf801/</link>
<description>1</description>
<pubDate>Sun, 12 Jul 2020 00:00:00 +0000</pubDate>
<guid>http://localhost:8000/linux/6ffd0cc4-c4cb-11ea-b89d-5404a66bf801/</guid>
<enclosure length="15302" type="image/jpg" url="/media/raster_image/6w2RnwFGB2qv3LoQ9hafvf/350_1x-c63dTm9ByBxb8wYv2Tb6Md.jpg"></enclosure>
<category>Linux</category>
</item>
<item>
<title>6ffd0cc5-c4cb-11ea-b89d-5404a66bf801</title>
<link>http://localhost:8000/linux/6ffd0cc5-c4cb-11ea-b89d-5404a66bf801/</link>
<description>1</description>
<pubDate>Sun, 12 Jul 2020 00:00:00 +0000</pubDate>
<guid>http://localhost:8000/linux/6ffd0cc5-c4cb-11ea-b89d-5404a66bf801/</guid>
<enclosure length="15302" type="image/jpg" url="/media/raster_image/6w2RnwFGB2qv3LoQ9hafvf/350_1x-c63dTm9ByBxb8wYv2Tb6Md.jpg"></enclosure>
<category>Linux</category>
</item>
...

问题

订阅源中没有更新日期。

文档中的示例包含更新日期：https://docs.djangoproject.com/en/3.0/ref/contrib/syndication/#feed-类别参考

顺便说一句：如果我注释item_pubdate或item_pubdate-out，xml的模式不会改变。也许这两者中最近的一个出现在提要中？RSS 2.0规范不包含更新日期：https://validator.w3.org/feed/docs/rss2.html

我该如何解决此问题？

Answer 1

正如您所指出的，RSS规范不包括updatedDate。提要的默认提要类型是RSS 2.01，它不会查找此参数。

如果您希望它出现在提要中，则需要使用不同的提要类型，例如Atom 1.0。

如果我注释item_pubdate out，xml的模式不会改变

我不明白为什么会这样，除非你在某个地方进行了一些缓存。