Attribute values for product variations - woocommerce

Question

I'm facing a big problem with product variations and their attributes in woocommerce. I'm trying to display a table with each attribute for each availabe product variation. But Woocommerce saves the attributes in post meta complete in lowercase, replaces slashes and german special characters like ü,ö,ä etc. I get the attributes with $variation->get_variation_attributes().
I've searched the database for the save values you can see for example in the dropdown in the admin panel, but they are saved like this without a link to the variation they are assigned to:
a:5:{s:10:"bestell-nr";a:6:{s:4:"name";s:11:"Bestell-Nr.";s:5:"value";s:9:"1 | 2 | and so on...
How can I get the attributes in their correct format to display?

Answer 1

Actually product attributes are actually terms in custom taxonomies, so you just need to get the terms in that particular taxonomy. All attribute taxonomies are prefaced with 'pa_'. So a size attribute would be a 'pa_size' taxonomy. And the variation ID is the post ID for a variation.
But depending on how you want to display it, WooCommerce has a built-in function for displaying all a variation's attributes:
The following will display a definition list of all of a variations attributes.
echo wc_get_formatted_variation( $product->get_variation_attributes() );
And passing a second parameter of true will display a flat list:
echo wc_get_formatted_variation( $product->get_variation_attributes(), true );

Answer 2

This seems to work for me. Hope this helps.
$post = get_post();
$id = $post->ID;
$product_variations = new WC_Product_Variable( $id );
$product_variations = $product_variations->get_available_variations();
print_r($product_variations);
This can be found in the class-wc-product-variable.php
So basically if you look around on that page you can find a bunch of useful functions.
Here is something i put together.
$product_children = $product_variations->get_children();
$child_variations = array();
foreach ($product_children as $child){
$child_variations[] = $product_variations->get_available_variation($child);
}
print_r($child_variations);

Answer 3

I only wanted to publish one of the variation attributes rather than all of them; contributing this code in case it's helpful to anyone else.
get_variation_attributes() gets all the attributes
wc_get_formatted_variation() returns a formatted version of the array it's handed
$attributes = $productVariation->get_variation_attributes() ;
if ( $attributes [ 'attribute_pa_colour' ] ) {
$colour = [ 'attribute_pa_colour' => $attributes [ 'attribute_pa_colour'] ];
echo wc_get_formatted_variation ( $colour );
}

Answer 4

The way I do it is by using "get_post_meta":
echo get_post_meta( $variation_id, 'attribute_name_field', true);
Hopes this helps someone.

Answer 5

I used wp_get_post_terms to get correct variance attributes.
global $product;
$variations = $product->get_available_variations();
$var = [];
foreach ($variations as $variation) {
$var[] = $variation['attributes'];
}
var_dump($var);
//xxx to get attribute values with correct lower-upper-mixed-case
foreach ($var as $key => $arr) {
foreach ($arr as $orig_code => $lowercase_value) {
$terms_arr = wp_get_post_terms( $product->id, str_replace('attribute_','',$orig_code), array( 'fields' => 'names' ) );
foreach ($terms_arr as $term) {
if (strtolower($term) == $lowercase_value) {
$var[$key][$orig_code] = $term;
break;
}
}
}
}
var_dump($var);
The results:
Before hard code
array (size=1)
0 =>
array (size=2)
'attribute_pa_width' => string 'none' (length=4)
'attribute_pa_code' => string 'valancese' (length=9)
After hard code:
array (size=1)
0 =>
array (size=2)
'attribute_pa_width' => string 'None' (length=4)
'attribute_pa_code' => string 'ValanceSe' (length=9)

Answer 6

Just went through this ...here is my solution. It handles multiple attributes and all the variations. You just have to know the attribute slug.
$items = $order->get_items();
foreach( $items as $item_id => $product )
{
$ProductName = $product->get_name(); /
if($product->is_type( 'simple' ))
$CoreProductName = $ProductName; // No variance
else
{
list($CoreProductName, $ThrowAway) = explode(" - ",$ProductName, 2);
$variation_id = $product['variation_id'];
$variation = new WC_Product_Variation($variation_id);
$attributes = $variation->get_variation_attributes();
$SelectedAttribute1 = $attributes['attribute_YOUR_SLUG1_PER_PRODUCT'];
$SelectedAttribute2 = $attributes['attribute_YOUR_SLUG2_PER_PRODUCT'];
}
}