‘invalid render array key’ error when using an associated array for a twig variable

I have a list of images, and I want access to both the direct path to the image, and the path with an image style applied to it available to a twig template. I’m grabbing the images in my .theme file like so.

$images = $node->get('field_image');  foreach($images as $image){     $image_style =DrupalimageEntityImageStyle::load('photos')->buildUrl($image->entity->getFileuri()),     $image_path = file_create_url($image->entity->getFileuri()),     } 

I want to be able to access these attributes for each image by storing them in the $variables array.

I attempted to do so by using

foreach($images as $image){     $image_style =DrupalimageEntityImageStyle::load('photos')->buildUrl($image->entity->getFileuri()),     $image_path = file_create_url($image->entity->getFileuri()),         $variables['photos'][]['image_style'] = $image_style;     $variables['photos'][]['image_path'] = $image_path; } 

However that didn’t work and I received errors. After that I figured that maybe I needed to supply a more explicit associative array so I tried

    $variables['photos'] = array();     $photo_paths = array();     foreach($images as $image){         $photo_paths += [             $i => [                 'image_style' => DrupalimageEntityImageStyle::load('photos')->buildUrl($image->entity->getFileuri()),                 'image_path' => file_create_url($image->entity->getFileuri()),                         ],         ];          $i += 1;     }     $variables['photos']= $photo_paths; 

But then I receive the error

User error: “image_style” is an invalid render array key in DrupalCoreRenderElement::children() (line 97 of core/lib/Drupal/Core/Render/Element.php).

and

User error: “image_path” is an invalid render array key in DrupalCoreRenderElement::children() (line 97 of core/lib/Drupal/Core/Render/Element.php).

These errors continue for each image. I’m guessing that $variables can’t handle nested associative arrays? Is there a way I can use an associative array inside a twig variable? Or is there another way to accomplish the same task or storing the path and image style for each individual image to be displayed in a for loop in twig?

This article was republished from its original source.
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‘invalid render array key’ error when using an associated array for a twig variable

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