Tell us what you are trying to do?
I tried to make a 3 levels relationsships with my woocommerce products.
First, customers have to select the year after the make and then choose a model.
Is there a similar example that we can see?
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What is the link to your site?
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Hello,
In your case, I don't think using post type relationship is a good idea, for example
Years:2018 Makes: Ford ...
Years:2018 Makes: Audi ...
Years:2017 Makes: Ford ...
Years:2017 Makes: Audi ...
In this case, you can not setup one-to-many relationship between post type "Years" and "Makes", it needs many-to-many relationships, then it won't work as State-> City -> Property as our demo site:
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I suggest you try to with custom taxonomies, then use AJAX search setting "Show only available options for each input" in your custom search form.
For example:
1) Create three taxonomies, register them to post type "Product":
- Years
- Makes
- Models
https://toolset.com/documentation/user-guides/create-custom-taxonomies/
2) Then you will be able to edit each product posts, and assign terms with those three taxonomies easily.
3) Create a post with search form, query product posts, filter by those three taxonomies, in section "Custom Search Settings", enable option "Show only available options for each input", then in front-end, when user select Years "2018", the other two taxonomy fields ("Makes" and "Models") will display only available options, see our document:
https://toolset.com/documentation/user-guides/front-page-filters/advanced-settings-custom-search/#dependent-parametric-search
