Woocommerce：如何在functions.php 中使用get_term_by：查找产品类别ID

Question

When I run the standard Woocommerce Product Import

• If a meta field in my import spreadsheet indicates that a Product Item must be hidden
  • I set the catalog_visibility to hidden
  • I need to lookup the ID for a special Product Category
    • and append that to that Item's Product Categories

My Category Name: Not for Web Sale

My Category Slug: not_for_web_sale

So I am calling this in functions.php

if($cat_term_object = get_term_by('slug','not_for_web_sale','product_cat')) {
    $cat_term_id = $cat_term_object->term_id;
}

PROBLEM

I am not getting any return value

WHAT I HAVE FOUND

This post tells me that:

This is probably happening because the taxonomy you're trying to query is registered yet. Eg. The WordPress environment is loaded when a theme's functions.php file loads, but many plugins/themes/core functions don't register taxonomies until later.

And it suggests:

Try hooking into init with a really high priority number and running the get_term_by function. Like so:

<?php
add_action( 'init', 'wpse27111_tester', 999 );
function wpse27111_tester()
{
    $term = get_term_by('slug', 'some-term', 'some-taxonomy');
    var_dump($term);
}

WHERE I AM STUCK

Although I basically understand the explanation of the problem wrt the Woocommerce taxonomy ... ... I am not grasping how to apply that to my needs.

Advice or guidance would be most welcome.

( Unfortunately my rep on that particular stackexchange is too low to comment )

Answer 1

Solved.

So what I needed to do in functions.php was

• make my own custom function
• call the get_term_by() from inside my custom function
• add_action with a lower priority number = higher execution priority

add_action( 'init', 'get_not_for_sale_category_id', 10 );
function get_not_for_sale_category_id() {
   if ( $cat_term_object = get_term_by('slug','not_for_web_sale','product_cat') ) {
      $cat_term_id_value = $cat_term_object->term_id;
   } else {
      $cat_term_id_value = 1010101;
   }
   return $cat_term_id_value;

Then in my import function, I call like this

$cat_term_id = get_not_for_sale_category_id();

---

EDIT

I've hooked it into a more appropriate place.

add_action( 'woocommerce_product_import_before_import', 'get_not_for_sale_category_id', 10 );

It's only called now on Import by an admin and not every page load by every user.