Trying to build a sitemap with <lastmod> attribute for pages

davidroessli · Oct 2nd 2019

Dear all,

I’m building a sitemap that includes the lastmod attribute.

While I have no problem including this info for blog entries, I’m stalling for regular pages.

The perch:pages namespace (Navigation and Pages) doesn’t provide access to the page modification date. E.g. <perch:pages id="pageModified"> doesn’t return anything.

I tried including a layout in the template which uses `perch_page_modified()` but that breaks the render of the page with the error “Namespace prefix perch on layout is not defined”.

Has anyone successfully built a sitemap with the lastmod attribute for pages?

Clive Walker · Oct 2nd 2019

You probably need to format the date as described in this post, http://forum.grabaperch.com/fo…te-and-time-format?page=1

davidroessli · Oct 2nd 2019

Thanks Clive Walker, I tried that, but nothing seems to be returned by `pageModified`…

Code

<url>
<loc>https://davidroessli.com<perch:pages id="pagePath"></loc>
<lastmod><perch:pages id="pageModified" format="%Y-%m-%dT%H:%M:%S+00:00" /></lastmod>
</url>

Clive Walker · Oct 3rd 2019

That's not what I expected to see (in your screenshot). The opening <lastmod> tag has been stripped out. I expected opening and closing tags with nothing inside them.

Which version of Perch are you using?

dunc · Oct 3rd 2019

Line 2 has a non-closed perch:pages tag. It’s stopping the lastmod tags showing.

I guess the version in use is pre-3.1 (or whichever version introduces self-closing Perch tags).

davidroessli · Oct 4th 2019

Thanks for your answers.

Clive Walker : I am using Perch Runway 3.1.3. The opening <lastmod> element is present, but as it is empty, it shows up as <lastmod /> in my XML viewer (see screenshot of source code below).

dunc : the <perch:pages> element is closed with a trailing '/' before the '>'

drewm Oct 2nd 2019