[Resolved] Conditional – check if specific child posts do not exist

[Author]

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[Matthias Reichl]

* Tell us what you are trying to do?

I have the follwing custom post types
- event (parent)
- person (parent)
- registration (child of 2 parents)

In a loop listing the events I want to show a link to a CRED form for regitration only if:
the person is not yet registered.
I fetch the ID of the person of the logged-in user with a custom function [get_person_id]

I suppose that I need a custom function to check this condition, however, failed to establish a working one.

* Is there any documentation that you are following?

I searched the Toolset form but found only examples with a single parent-child relation.

[Minesh]

Hello. Thank you for contacting the Toolset support.

As I understand, you just need to check if user is logged in or not, as user will be loggedin if and only if he registered. correct?
If yes:

You can try following code to display conditional content.

[wpv-conditional if="('[wpv-current-user info='id']' eq  '')"]
user is NOT registered
[/wpv-conditional]

[wpv-conditional if="('[wpv-current-user info='id']' ne  '')"]
user is  registered
[/wpv-conditional]

Please have look at following documentation that may help you:
=> https://toolset.com/documentation/views-shortcodes/#wpv-current-user
=> https://toolset.com/documentation/user-guides/conditional-html-output-in-views/

[Matthias Reichl]

Hi Minseh!

Thank you for your answer, however, this is not quite my problem.

The problem is to check whether the logged in user is already registered to an event.
Conditon = there is NO record in the custom post type "registration" with

- parent 1 = the event (the condition will be placed in the view listing all events)
- parent 2 = the person associated with the logged in user = custom function [get_person_id]

[Minesh]

Ok - that means you need to check if registration (child) post is exists for any event equal to currently logged in user. I would like to make here clear user can register for multiple events - correct? so we need to check with particular event if current user registered.

So, here is the Doc to fetch related child posts:
=> https://toolset.com/documentation/user-guides/querying-and-displaying-child-posts/
=> https://toolset.com/documentation/customizing-sites-using-php/displaying-child-posts/

The best way is:
- create a view for your post type registration - lets say view name "display-registration-button"
- Add query filter (need to add two filters):
#) Post relationship filter = post set by parent view
#) post author = same as loggedin user
(More info: https://toolset.com/documentation/user-guides/filtering-views-query-by-author/)
- Add your registration button to this view's loop output section and save the view
- Add view "display-registration-button" in a loop listing the events

I hope this will solve the issue.

[Matthias Reichl]

Hi Minesh!

Thank you for your assistance.