How to test for empty fields?

[antknight]

First question. How does PW deal with empty fields?

Second question. I have made a repeater for a slideshow where you can set image, delay and caption. I only want the h6 to display if there are actually items in the repeater. How can I test for this?

<h6>Images</h6>

 <?php
 foreach($page->gallery as $slide) {
	 echo "<a rel='prettyPhoto[pp_gal]' title='{$slide->gallery_caption}' href='{$slide->gallery_image->url}'>
	 <img class='peKbGallery' data-delay='{$slide->gallery_delay}' src='{$slide->gallery_image->url}' alt='{$slide->gallery_caption} (Click to enlarge)' />
	 </a>";
 }
 ?>

Thanks!

[Exceptionz Project]

You could use the count function:

if(count($page->gallery)) {
// here your code (for displaying h6 ...)
} else {
// ...
}

For more information look at here http://processwire.c...ypes/repeaters/ or here http://processwire.c...pi/arrays/page/

The value of a repeater field is a PageArray. As a result, you may interact with them exactly like you would any other group of pages in ProcessWire.

[diogo]

First question. How does PW deal with empty fields?

if($page->body){
//not empty
}else{
//empty
}

other options

if($page->body) echo "body not empty";

if(!$page->body) echo "body empty";

for the second question:

<?php if($page->gallery->count() > 0){?>
<h6>Images</h6>

<?php
foreach($page->gallery as $slide) {
   echo "<a rel='prettyPhoto[pp_gal]' title='{$slide->gallery_caption}' href='{$slide->gallery_image->url}'>
   <img class='peKbGallery' data-delay='{$slide->gallery_delay}' src='{$slide->gallery_image->url}' alt='{$slide->gallery_caption} (Click to enlarge)' />
   </a>";
    }
}
?>

[Soma]

Some PW template syntax to the table?

<? if(count($page->gallery)): ?>
   <h6>Images</h6>
   <? foreach($page->gallery as $slide): ?>
       <a rel='prettyPhoto[pp_gal]'
           title='<?= $slide->gallery_caption ?>'
           href='<?= $slide->gallery_image->url ?>'>
           <img class='peKbGallery'
               data-delay='<?= $slide->gallery_delay ?>'
               src='<?= $slide->gallery_image->url ?>'
               alt='<?= $slide->gallery_caption ?> (Click to enlarge)' />
       </a>";
   <? endforeach; ?>
<? endif; ?>

[antknight]

Thanks!

I did try

if(count($page->gallery_image)) {

but that didn't work...

Can you explain what you mean by

Some PW template syntax to the table?

Are you referring to this? http://processwire.c...why-php-syntax/

[ryan]

if(count($page->gallery_image)) didn't work, I'm guessing gallery_image is not a repeater field? Try this to see what you get:

echo "<pre>gallery_image is: "; 
if(is_object($page->gallery_image)) {
 echo "object of type " . get_class($page->gallery_image); 
 if(WireArray::iterable($page->gallery_image)) {
   echo " with " . count($page->gallery_image) . " items";
 }
} else {
 var_dump($page->gallery_image); 
}
echo "</pre>";

[diogo]

Can you explain what you mean by

Quote

Some PW template syntax to the table?

Are you referring to this? http://processwire.c...why-php-syntax/

Yes, but I think Soma is reporting to this post from Apeisa http://processwire.c...ine/#entry12629

I tried to answer without modifying your code too much, but I admit it came out kind of ugly. Soma's code is much better

edit: also, if someone has troubles to understand these <? if(count($page->gallery)): ?> , <? endif; ?>, just have a look here http://php.net/manua...tive-syntax.php

[antknight]

gallery_image is a field within a repeater which is populated. That code returns gallery_image is: NULL.

Also, I used a tinymce textarea to enable multiple youtube video embeds, best way to do that you think? I couldn't think how else to do it, but it does rely on them pasting each video link in a separate paragraph...

[diogo]

Also, I used a tinymce textarea to enable multiple youtube video embeds, best way to do that you think?

I think in this case a repeatable would be more friendly

[antknight]

I think in this case a repeatable would be more friendly

I agree, but with what fieldtype? URL? Then how to embed the video? They would have to copy the embed URL with the correct size from youtube. It would be good if the youtube video embed module worked with URL field

[diogo]

I agree, but with what fieldtype?

You have many options, can even be a text field. If you ask for the entire URL, You just have to output like this:

<iframe width="420" height="315" src="<?=$repeater->video?>"></iframe>

If you ask for the video ID, do this instead:

<iframe width="420" height="315" src="https://www.youtube.com/embed/<?=$repeater->video?>"></iframe>

There is also a module for this http://modules.proce...er-video-embed/

[antknight]

Some good options there. Thanks. I am using the module at the moment but only works with a tinymce enabled textarea?

[diogo]

Never used it myself, but since it's a text formatter module it should work also in any text field. On the field options, go to the "details" tab, and add it from the text formatters dropdown.