vegacorp

Jose Vega

Force users to select a product category when creating or editing WooCommerce Products. For example, make category required.
Prevent users from creating products without category.
You can change the validation message in the settings page, by default it says: “Please select {taxonomy_name}”. Example: “Please select categories”.
<h4>Use cases</h4>
<ul>
<li>Force users to select a category when creating products</li>
<li>Force users to select a category when editing products</li>
</ul>
<h4>Go Premium</h4>
<ul>
<li>
Force users to select a tag when publishing WooCommerce Products
</li>
<li>
Force users to select Sizes (Product Attribute) when publishing WooCommerce Products
</li>
<li>
Force users to select Color (Product Attribute) when publishing WooCommerce Products
</li>
<li>
Force users to select Global Product Attributes when publishing WooCommerce Products
</li>
<li>
Force users to select a category or tag when publishing Events
</li>
<li>
Force users to select a category or tag when publishing blog posts
</li>
<li>
Force users to select any Taxonomy Term when publishing any custom post type
</li>
</ul>
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Require Categories when Creating Products – WooCommerce

I can use it to force my clients to select category when creating products.

Great

Force users to select a product category when creating or editing WooCommerce Products. For example, make category required.

mitcho (Michael Yoshitaka Erlewine)

This infrastructure plugin adds basic UI for single-valued taxonomies, i.e. a taxonomy with presents a <code>select</code> widget.
<h4>Usage</h4>
When registering your custom taxonomy, add the argument <code>single_value</code> set to <code>true</code> to get the single value UI. If a selection of this term is required, also add <code>required</code> set to <code>true</code>.
<pre><code>register_taxonomy(
 'astrological_sign',
 array( 'person' ),
 array(
 'hierarchical' => false,
 'show_ui' => true,
 'required' => true,
 'single_value' => true
 )
);
</code></pre>
Development of this plugin supported by <a href="http://globalshakespeares.org" rel="nofollow ugc">MIT Global Shakespeares</a>.

Single Value Taxonomy UI

This infrastructure plugin adds basic UI for single-valued taxonomies, i.e. a taxonomy with presents a select widget.

Require Categories when Creating Products – WooCommerce vs Single Value Taxonomy UI