_unit and product_unit are not rendered

I’ve checked on simple products and it’s the same issue

Good idea, Michel. I now know what the problem is. _unit is empty in the variants itself, but contained in the parent. In the woocommerce admin interface the unit is only defined in the general product settings, not in the variants. See here, post id=833 is the general product and 834 to 836 are the variants:

MariaDB [wordpress]> SELECT * FROM wp_8_postmeta WHERE meta_key = '_unit' AND post_id = 833;
+---------+---------+----------+------------+
| meta_id | post_id | meta_key | meta_value |
+---------+---------+----------+------------+
|   11857 |     833 | _unit    | kg         |
+---------+---------+----------+------------+
1 row in set (0.001 sec)

MariaDB [wordpress]> SELECT * FROM wp_8_postmeta WHERE meta_key = '_unit' AND post_id = 834;
+---------+---------+----------+------------+
| meta_id | post_id | meta_key | meta_value |
+---------+---------+----------+------------+
|   13322 |     834 | _unit    |            |
+---------+---------+----------+------------+
1 row in set (0.002 sec)

MariaDB [wordpress]> SELECT * FROM wp_8_postmeta WHERE meta_key = '_unit' AND post_id = 835;
+---------+---------+----------+------------+
| meta_id | post_id | meta_key | meta_value |
+---------+---------+----------+------------+
|   13318 |     835 | _unit    |            |
+---------+---------+----------+------------+
1 row in set (0.002 sec)

MariaDB [wordpress]> SELECT * FROM wp_8_postmeta WHERE meta_key = '_unit' AND post_id = 836;
+---------+---------+----------+------------+
| meta_id | post_id | meta_key | meta_value |
+---------+---------+----------+------------+
|   16587 |     836 | _unit    |            |
+---------+---------+----------+------------+
1 row in set (0.003 sec)

Thanks Michel, and sorry for creating some confusion. I purchased the premium version once I noticed the problem came up with the free version. So now I’ve tried 2.19.2 and can confirm that _unit now delivers content when unchecking “Include Product Variation”.

However the solution still poses a problem for me. While the units are retrieved from the general product settings, the price is taken from the first variant and therefore wrong unit prices are returned in many occasions. This is legally critical for me and has already cost me 3000 EUR for amazon and ebay doing this error on my behalf…

Ideally I would like product variants in the feed to get more leads. Is there a clean solution possible on your side or should I better contact
Vendidero to handle the _unit option differently? Maybe they have introduced the problem by recently making changes here.

@michel-jongbloed,

1. I had that idea recently before I got premium version. I think it would work, but only for products with two variants. But then I would need no premium version anymore 😉

2. The _unit attribute (kg, ml, etc.) can only be set in the main product. The variants don’t have that field, probably to avoid different units. In the variants you define the number of units the variant is comprised of, let’s say 0.5 and 1, meaning I have two variants 0.5kg and 1kg in this case.