Checking if page shares a parent and has same name

[onjegolders]

Hi guys, I'm currently trying to add events to a calendar where each event will have a date as a parent.

I'm trying to error check duplicate entries under the same date to avoid having the system error show.

So an event can share the same name and title if it has a different parent essentially.

But I can't seem to find a selector to test this.

In words: 

if parent's name is $input->post->date and name is $input->post->name

then set error to 1 

Could anyone point me in the right direction?

Thanks

[onjegolders]

I think for now it might be best practice to let PW handle the "name" attribute as per this post by Wanze http://processwire.com/talk/topic/3262-create-non-duplicate-page-name-via-api/

Thanks.

[diogo]

Anyway, if you would decide to do that check, you could do it like this:

if ($pages->get("parent.name=$input->post->date, name=$input->post->name")->id) // set error to 1

edit: Ryan has some important additions to this on a post bellow

[onjegolders]

Thanks Diogo, thought it had to be possible somehow

[ryan]

Anyway, if you would decide to do that check, you could do it like this:

if ($pages->get("parent.name=$input->post->date, name=$input->post->name")->id) // set error to 1

 

 

Be careful not to pass values from $input directly into a selector. They would need to be filtered before going into the selector. 

// convert to unix timestamp then back to string, just to ensure it's valid (this is just one way)
$date = date('Y-m-d', strtotime($input->post->date)); 

// sanitize name to be a pageName
$name = $sanitizer->pageName($input->post->name); 

if($pages->get("parent.name=$date, name=$name, template=event")->id) { 
  /* set error to 1 */ 
}

[diogo]

You're right Ryan. I knew that onjegolders knows this, and just wanted to give him the idea of how to do it. But we can't forget that more people can follow these advises...

[onjegolders]

Thanks gents