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How to convert content from an "image extra" field


biber
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Some years ago I built a site with the help of the 'Image extra'-module. After some problems I decided to change to the modern way with a field-images-template. Now I want to copy the contents of that old Image-extra-field to my new fields. Is there a way to do that for all images at once?

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I did exactly the same thing a year or two ago.

Here's the script I used (I've simplified the selector and a couple of other things, and added one comment). The script moves the image description and the ImageExtra field 'credit' to the new 'photo_caption' and 'photo_credit' fields.

I don't know if you're familiar with running such scripts, but you simply put the script somewhere on your server and enter its URL in your browser. It might be a good idea to test with the saves commented out.

<?php

	// Amend depending on where this script file is located
    include("../index.php");

    $selectedRecords = $wire->pages->find("template=my-template");
    echo "Pages with images: " . count($selectedRecords) . "<br/>";

    $recordsProcessed = 0;
    foreach($selectedRecords as $thisRecord) {
        echo $thisRecord->title . "<br/>";
        $recordsProcessed += 1;
        if(count($thisRecord->article_images)) {
            $thisRecord->of(false);
            foreach($thisRecord->article_images as $image) {
              
                $description = $image->description;
                $credit = $image->credit;

                $image->photo_caption = $description;
                $image->photo_credit = $credit;

                $thisRecord->save('article_images');
            }
            $thisRecord->save();
        }
    }
    echo "<p>Records processed: {$recordsProcessed}</p>";
?>

This was written for a one-off task, so I did nothing to refine it, but it worked. Note that at the time both saves were necessary, though I think this has been resolved now and, depending on which version of PW you are running, you may be able just to save the whole record - but it'd probably be easier to leave it as it is!

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Hi BillH,

now I added your script to one of my templates and called it with my browser. As long as I leave the saves commented out it runs as desired, but if I try to save the changes it comes up with an "Internal Server Error"

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The script should be a standalone PHP file, not placed in a template.

So, for example, you might name the script "fix-images.php" and put the file in /site/.

Then, if you normally access the site at https://www.mysite.com, run the script by accessing https://mysite.com/site/fix-images.php .

For more details, take a look at this page (particularly the last section):  https://processwire.com/docs/front-end/include/

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I'd definitely try @netcarver's suggestion first.

And if that doesn't work, you could try putting this after saving the record, though I'm not sure if it will make a difference:

$pages->uncacheAll();

Then if you still have the problem, for a one-off task you could split the processing into batches. Doing something like the following is highly inefficient, but simple and will definitely work – and is probably more efficient than spending a lot of time trying to find a better fix!

$startPage = 0; // Manually change this for each batch
$endPage = 1000; // And this too
$pageCounter = 0;
foreach($pageToProcess as $thisPage) {
	$pageCounter += 1;
	if (($pageCounter >= $startPage) && ($pageCounter <= $endPage)) {
		// Process $thisPage here
	}
}

 

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@netcarver

I asked my webhoster: scripts are limited at 300 seconds, but my script stops at less than 60 seconds. So I addet

	set_time_limit(300);
	ignore_user_abort(0); 

to my script, but this did not change anything.

Greetings Günter

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@BillH

Sorry, but I am not very familiar with php-programming, so I didn't find the right place where to add your patch to your convert-script. Would you be so kind to post the whole script?

Günter

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Here you go!

You need to decide how big each batch will be and set the $startPage and $endPage values each time you run the script. For example, if you have 1230 pages and decide to run the script three times you could use 0 and 499; 500 and 999; 1000 and 1300. Note that you should start at 0 (because the indexing of the page array starts at 0). And it's OK if the last number is larger than the total number of pages.

Note also that I haven't tested the code, so let me know if it doesn't work!

<?php

	// If you put the script in /site/ this is OK (otherwise you may need to amend)
    include("../index.php");
    
    // Change these two values for each batch
    $startPage = 0;
	$endPage = 499;
	
	// Change the selector to match your pages
    $selectedRecords = $wire->pages->find("template=my-template");
    
    echo "Pages with images: " . count($selectedRecords) . "<br/>";

	$pageCounter = 0;
    $recordsProcessed = 0;
    foreach($selectedRecords as $thisRecord) {
    
		$pageCounter += 1;
		if (($pageCounter >= $startPage) && ($pageCounter <= $endPage)) {    
    
			echo $thisRecord->title . "<br/>";
			$recordsProcessed += 1;
			if(count($thisRecord->article_images)) {
				$thisRecord->of(false);
				foreach($thisRecord->article_images as $image) {
			  
					$description = $image->description;
					$credit = $image->credit;

					$image->photo_caption = $description;
					$image->photo_credit = $credit;

					$thisRecord->save('article_images');
				}
				$thisRecord->save();
			}
		}
    }
    echo "<p>Records processed: {$recordsProcessed}</p>";
?>

 

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