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[Resolved] How to check if a post has a related post

This thread is resolved. Here is a description of the problem and solution.

Problem:
Can we somehow check if a post has a (one) related post, and display or hide content based on whether the post has or has no related post?

Solution:
Yes, you can take 2 approaches:
With Blocks or with ShortCodes.

Further details here:
https://toolset.com/forums/topic/how-to-check-if-a-post-is-in-a-specific-relationship/#post-1606811

This support ticket is created 4 years, 2 months ago. There's a good chance that you are reading advice that it now obsolete.

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This topic contains 4 replies, has 2 voices.

Last updated by alexG-4 4 years, 2 months ago.

Assisted by: Beda.

Author
Posts
#1606471

I have a CPT "Web Properties" and a Post Type "Feed Source" created by WP RSS Aggregator.

I have a 1-1 relationship: 'Web Properties' - 'Feed Sources'

In the context of a specific Web Property, I want to check whether it has a Feed Source related to it.

I can find no documentation nor any support ticket about this.

I tried this:

[wpv-conditional if="( '[wpv-post-slug].item(@web-property-feed-source.child)' ne '' )"]
.......
[/wpv-conditional]

without success.

Do I need to write a shortcode?

Alex

#1606811
Bildschirmfoto 2020-04-30 um 16.26.36.png

Using ShortCodes you could use the Conditional / If button in any text editor to add the condition.
Since you simply want to check if a given post (current) has any related posts, you can check on the "related" Post ID with "if is empty/not empty)
This will produce something like:

[wpv-conditional if="( '[wpv-post-id item="@your-relationship.parent"]' eq '' )"]This post has no related post[/wpv-conditional]

Above would display "This post has no related post" when the post ha no related post, and nothing if there is a related post.
By changing the "eq" to "ne" you can invert the condition and output things when there are related posts, and nothing if not.

Using a Conditional Block instead, you can do the same but you'd never need to edit ShortCodes.
(I've added a screenshot of that setting)

#1606917

Thanks Beda - I've got it working now.

Originally, I used

'[wpv-post-slug].item(@web-property-feed-source.child)'

(see above) which DID NOT work, but

'[wpv-post-slug item="@web-property-feed-source.child"]'

DOES work

I found the [---].item .... syntax somewhere on the forum. It appears that it is not equivalent to the [---- item=....] syntax.

Are there any circumstances where it's correct to use the [---].item.... syntax?

Alex

#1606923

Yes, the first syntax you share is simply not valid: it seems manually constructed.

There is no such syntax as you use in the first example because there the ShortCode closes already before the actual attribute:
It cannot work like that by definition of a ShortCode

The syntax produced by the GUI is the right one to use.

#1606989

My issue is resolved now. Thank you!

This ticket is now closed. If you're a Toolset client and need related help, please open a new support ticket.