We have toolset installed on our site and we have woocommerce installed on it. We have books as products as product in woocommerce and each book has relationship with authors, traders, etc, those value are not being shown on some products while showing on other products. I am not sure why is this happening because toolset view is being used on product is same for all products.
We have setup a test setup for you guys to look at it. I am giving you one product which is showing authors and other info correctly and one more link where product is not showing info.
directory is password protected, so please use this credentials to view the page
This product for example is showing Auteurs correctly hidden link
This one is not showing hidden link
Content view being used for all products is same and it can be found in toolset view. Here is the name "Single Product V2"
I have also attached screenshot in which auters is being displayed and in other there is no auters, while in the admin, auters is added in both.
Here is admin credentials for you to check if you want to check admin credentials.
I removed the site credentials from your question, this forum is public, so please only share sensitive information when we set up a private reply for you.
I took a look at your site.
It seems like this site has evolved and was perhaps originally based on the older Types version 2 relationships, whereby many-to-many relationships were created using two one-to-many relationships and an intermediary post type.
But checking Toolset > Relationships I can see that you also have Types version 3 many-to-many relationships, with Products and Authors connected directly with such a relationship.
I don't know the specific history of this site, but it looks like some of the posts are connected using one or both old and new methods, which is why related content is shown for some posts but not others.
Looking at the View "All authors of a book view", it queries the old intermediate post type ("Auteurs-du-Livre") and then displays fields from the Author post type by adding the attribute "id=$auteur" to the shortcodes, to switch the source.
It seems like that is not necessary if your relationships have been migrated to Types V3 relationships.
Try changing the post type which is queried to the one you actually want to display (e.g. Author), and remove the id attributes from the shortcodes where you output the fields, so that you are outputting fields from the Author posts themselves.
You'll need to do something similar for the other Views where the output is missing.