link_to_next/prev in latest 4.8beta+

colak · 2020-01-25 15:20:05

I seem to be having trouble with the link_to_next and link_to_prev tags in the latest dev version. The error returned reads

Notice: Undefined index: prev while parsing form None on page Blog

The article is not calling for a form as its content is contained within the wrapped article tag. I deleted all presentational elements and tried the code below.

<txp:if_individual_article>
	<txp:article status="live" form="">
		<h1><txp:title /></h1>
		<txp:body />
		<txp:variable name="prev1" value='<txp:link_to_prev />' />
			<txp:if_variable name="prev1" value="">
			<txp:else />
			<txp:link_to_prev><txp:prev_title /></txp:link_to_prev>
			</txp:if_variable>
		<txp:variable name="next1" value='<txp:link_to_next />' />
			<txp:if_variable name="next1" value="">
			<txp:else />
			<txp:link_to_next><txp:next_title /></txp:link_to_next>
			</txp:if_variable>
	</txp:article>
</txp:if_individual_article>

>Edited to add that creating a form and changing it to <txp:article status="live" form="my_form" /> also returns no links_to_xx.

Another edit to say that I have also created a new simple test page with the code above and a new section at the demo site.

The errors there are

Tag error: <txp:prev_title /> -> Textpattern Error: Incorrect parameter count in the call to native function 'FROM_UNIXTIME' while parsing form None on page test.

The same goes for next_title

Last edit:) I know that I may be the one doing something wrong as the links work fine in the default templates. Nevertheless the code above was working OK for me in txp4.7.3. Has something changed?

Last edited by colak (2020-01-25 16:47:29)

Bloke · 2020-01-25 16:39:58

Hmmm, something does seem to be going on there, but I’m not quite sure what. Perhaps the next/prev entries not being set after getNeighbour() returns due to the end of the list in either direction?

Might be to do with this commit from a few days ago, but it’s above my pay grade unless I sit down and figure out what’s going on; and I’m just heading out.

Hopefully Oleg will drop in and see this, as it’s probably a two-minute diagnosis for him!

etc · 2020-01-25 17:22:42

Guilty sorry!

colak · 2020-01-25 18:14:31

Yep! that’s corrected it.

colak · 2020-01-26 19:10:09

Sorry guys… I’m now experiencing a new issue but I’m not sure if it is because of my site’s structure.

Before I attempt my description, note that I only have these tags in the blog section of the site. The code used is basically the same as the one posted above.

Here’s the description

Viewing the latest article in the section, the link_to_prev appears
Clicking on the link, the loaded page only shows link_to_prev but no link_to_next.
Clicking on that, the third oldest post it starts behaving by displaying both link_to_prev and link_to_next as expected.

There appears to be no such issue on the live site running on txp4.7.3 on which the expected behaviour can be tested starting from here.

etc · 2020-01-26 19:54:56

Yiannis, are you testing the same data as on the live site? Could it be that two latest articles have identical sort values?

colak · 2020-01-27 06:04:35

Hi Oleg,
In the blog section all the articles are the same as in the live site. I will be afk until this afternoon, at which time I can check the article list for duplicated dates/times.

etc · 2020-01-27 11:19:24

colak wrote #321358:

`hi Oleg,
In the blog section all the articles are the same as in the live site. I will be afk until this afternoon, at which time I can check the article list for duplicated dates/times.

Hi Yiannis, 4.8beta.2 release is suspended to your testing :-) Also check please whether sticky status is somehow involved.

colak · 2020-01-27 14:46:23

HI, Just came back. I sorted the articles by date posted and I am omitting author and modified here as I assume that they are not relevant

2226	Children of Prometheus	20 Dec 2019 20:26:29	Projects	Live
2229	The Idea of the Avant Garde-And What It Means Today 2	19 Dec 2019 12:16:56	Blog	Live
2228	Respublika! publication review	19 Nov 2019 10:57:03	Blog	Live
2227	1s and 0s, haves and have-nots	11 Nov 2019 12:07:35	Projects	Live
2225	Jonas Lund and Elisa Lasowski	26 Oct 2019 07:41:21	Blog	Live
2223	Through Other Eyes	15 Oct 2019 09:42:40	Projects	Live
2222	Children of Prometheus	26 Sep 2019 09:53:51	Blog	Live

The problem is resolved on id 2225

>Edited to say. Do let me know if you would like access to the dev site.

Last edited by colak (2020-01-27 14:50:24)

etc · 2020-01-27 15:19:15

colak wrote #321363:

Do let me know if you would like access to the dev site.

Yes, this would help, thanks.

colak · 2020-01-27 15:35:31

etc wrote #321365:

Yes, this would help, thanks.

You have mail:)

etc · 2020-01-27 16:19:54

Should be solved, please check. The error (yours) was in this construction:

<txp:link_to_next><txp:next_title /></txp:link_to_next>

It should be

<txp:link_to_next><txp:title /></txp:link_to_next>

because inside link_to_next tag <txp:next_title /> points to the next next title.

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#1 2020-01-25 15:20:05