Add a custom taxonomy to WooCommerce import/export

add-taxonomy-to-woocommerce-export.php

<?php
/*
* Plugin Name: WooCommerce Add Taxonomy to Export
* Plugin URI: https://gist.github.com/helgatheviking/114c8df50cabb7119b3c895b1d854533/
* Description: Add a custom taxonomy to WooCommerce import/export.
* Version: 1.0.1
* Author: Kathy Darling
* Author URI: https://kathyisawesome.com/
*
* Woo: 18716:fbca839929aaddc78797a5b511c14da9
*
* Text Domain: woocommerce-product-bundles
* Domain Path: /languages/
*
* Requires at least: 5.0
* Tested up to: 5.0
*
* WC requires at least: 3.5
* WC tested up to: 3.5.4
*
* Copyright: © 2017-2019 SomewhereWarm SMPC.
* License: GNU General Public License v3.0
* License URI: http://www.gnu.org/licenses/gpl-3.0.html
*/

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
/**
* Add CSV columns for exporting extra data.
*
* @param  array  $columns
* @return array  $columns
*/
function kia_add_columns( $columns ) {
	$columns[ 'custom_taxonomy' ] = __( 'Your taxonomy', 'your-text-domain' );
	return $columns;
}
add_filter( 'woocommerce_product_export_column_names', 'kia_add_columns' );
add_filter( 'woocommerce_product_export_product_default_columns', 'kia_add_columns' );


/**
* MnM contents data column content.
*
* @param  mixed       $value
* @param  WC_Product  $product
* @return mixed       $value
*/
function kia_export_taxonomy( $value, $product ) {

	$terms = get_terms( array( 'object_ids' => $product->get_ID(), 'taxonomy' => 'your-taxonomy-slug' ) );

	if ( ! is_wp_error( $terms ) ) {

		$data = array();

		foreach ( (array) $terms as $term ) {
			$data[] = $term->term_id;
		}

		$value = json_encode( $data );

	}

	return $value;
}
add_filter( 'woocommerce_product_export_product_column_custom_taxonomy', 'kia_export_taxonomy', 10, 2 );



/**
 * Import
 */


/**
 * Register the 'Custom Column' column in the importer.
 *
 * @param  array  $columns
 * @return array  $columns
 */
function kia_map_columns( $columns ) {
	$columns[ 'custom_taxonomy' ] = __( 'Your taxonomy', 'your-text-domain' );
	return $columns;
}
add_filter( 'woocommerce_csv_product_import_mapping_options', 'kia_map_columns' );


/**
 * Add automatic mapping support for custom columns.
 *
 * @param  array  $columns
 * @return array  $columns
 */
function kia_add_columns_to_mapping_screen( $columns ) {

	$columns[ __( 'Your taxonomy', 'your-text-domain' ) ] 	= 'custom_taxonomy';

	// Always add English mappings.
	$columns[ 'Your taxonomy' ]	= 'custom_taxonomy';

	return $columns;
}
add_filter( 'woocommerce_csv_product_import_mapping_default_columns', 'kia_add_columns_to_mapping_screen' );


/**
 * Decode data items and parse JSON IDs.
 *
 * @param  array                    $parsed_data
 * @param  WC_Product_CSV_Importer  $importer
 * @return array
 */
function kia_parse_taxonomy_json( $parsed_data, $importer ) {

	if ( ! empty( $parsed_data[ 'custom_taxonomy' ] ) ) {

		$data = json_decode( $parsed_data[ 'custom_taxonomy' ], true );

		unset( $parsed_data[ 'custom_taxonomy' ] );

		if ( is_array( $data ) ) {

			$parsed_data[ 'custom_taxonomy' ] = array();

			foreach ( $data as $term_id ) {
				$parsed_data[ 'custom_taxonomy' ][] = $term_id;
			}
		}
	}

	return $parsed_data;
}
add_filter( 'woocommerce_product_importer_parsed_data', 'kia_parse_taxonomy_json', 10, 2 );


/**
 * Set taxonomy.
 *
 * @param  array  $parsed_data
 * @return array
 */
function kia_set_taxonomy( $product, $data ) {

	if ( is_a( $product, 'WC_Product' ) ) {

		if( ! empty( $data[ 'custom_taxonomy' ] ) ) {
			wp_set_object_terms( $product->get_id(),  (array) $data[ 'custom_taxonomy' ], 'your-taxonomy-slug' );
		}

	}

	return $product;
}
add_filter( 'woocommerce_product_import_inserted_product_object', 'kia_set_taxonomy', 10, 2 );

Thanks, @rbsmidt. After messing around with it for a few hours, I got it all to work as you described. At first, it was dropping long strings of terms separated by commas (ie. "foo1, bar1, foo2, bar2") into the taxonomy post. I resolved that by building an array and passing it to wp_set_object_terms().

I'll include my code but its pretty duplicitous between the pre_insert and insert filters. Maybe someone else has a better answer. Unfortunately, I'll have to come back to this later but for some reason, one won't work without the other.

function process_import($object, $data) {
    if (is_a($object, 'WC_Product')) {
        if (!empty($data['Part Number'])) {
            // Save object to assign correct product id
            $object->save();
			$terms = array();
			$part_numbers = $data['Part Number'];
			$part_numbers = explode(",",$part_numbers);
			
			foreach($part_numbers as $part_number){
				$part_number = get_term_by('name', $part_number, 'Part Number');
				$terms[]=$part_number->term_id;
			}
			
            
            if ($part_number) {
                wp_set_object_terms($object->get_id(), $terms, 'part_number');
            }
        }
    }
    return $object;
}
add_filter( 'woocommerce_product_import_pre_insert_product_object', 'process_import', 10, 2 );

/**
 * Set taxonomy.
 *
 * @param  array  $parsed_data
 * @return array
 */
function kia_set_taxonomy( $product, $data ) {

	if ( is_a( $product, 'WC_Product' ) ) {

		if( ! empty( $data[ 'part_number' ] ) ) {
			$terms = array();
			$part_numbers = $data['part_number'];
			if(strpos($part_numbers, ",")){
				$part_numbers = explode(",",$part_numbers);
				foreach($part_numbers as $part_number){
					$part_number = get_term_by('name', $part_number, 'part_number');
					$terms[] = $part_number->term_id;
				}
				wp_set_object_terms( $product->get_id(),  $terms, 'part_number' );
			}else{
				wp_set_object_terms( $product->get_id(),  (array) $part_numbers, 'part_number' );
			}
		}

	}

	return $product;
}
add_filter( 'woocommerce_product_import_inserted_product_object', 'kia_set_taxonomy', 10, 2 );

@rbsmidt, I had a feeling that was wrong. I managed to get those previous functions to work once and that was only because I had already imported the terms using a different plugin while trying to find the answer to this problem. In the process of troubleshooting my error, I was able to combine the two functions. This is what I've come up with and I've put it through its paces already.

/**
 * Set taxonomy.
 *
 * @param  array  $parsed_data
 * @return array
 */

function kia_set_taxonomy( $product, $data ) {
	if ( is_a( $product, 'WC_Product' ) ) {
		if( ! empty( $data[ 'part_number' ] ) ) {
            		$product->save();
            		$part_numbers = $data[ 'part_number' ];
            		$part_numbers = explode(",", $part_numbers);
            		$terms = array();
            		foreach($part_numbers as $part_number){
                		if(!get_term_by('name', $part_number, 'part_number')){
                    			$partNumArgs= array(
                        			'cat_name' => $part_number,
                        			'taxonomy' => 'part_number',
                    			);
                    			$part_number_cat = wp_insert_category($partNumArgs);
                    			array_push($terms, $part_number_cat);
                		}else{
                    			$part_number_cat = get_term_by('name', $part_number, 'part_number')->term_id;
                    			array_push($terms, $part_number_cat);
                		}
            		}
			wp_set_object_terms( $product->get_id(),  $terms, 'part_number' );
		}
	}
	return $product;
}
add_filter( 'woocommerce_product_import_inserted_product_object', 'kia_set_taxonomy', 10, 2 );

Here you go, just change the taxonomy name "suppliers" to your existing custom taxonomy name, and don't forget to change the column name as well in the CSV file, once done, you only need to add the taxonomy term name you want to assign the products to into the column cells.

Cheers!

function add_column_to_importer( $options ) {

  // column slug => column name
  $options['suppliers'] = 'Suppliers';

  return $options;
}
add_filter( 'woocommerce_csv_product_import_mapping_options', 'add_column_to_importer' );


function add_column_to_mapping_screen( $columns ) {
  
  // potential column name => column slug
  $columns['Suppliers'] = 'suppliers';

  return $columns;
}
add_filter( 'woocommerce_csv_product_import_mapping_default_columns', 'add_column_to_mapping_screen' );


function process_import($object, $data) {
    if (is_a($object, 'WC_Product')) {
        if (!empty($data['suppliers'])) {
            // Save object to assign correct product id
            $object->save();
            wp_set_object_terms( $object->get_id(),  $data['suppliers'], 'suppliers' );
        }
    }
    return $object;
}
add_filter( 'woocommerce_product_import_pre_insert_product_object', 'process_import', 10, 2 );

Thanks so much for this code! I created a reusable class for this since I've needed it a few times. This version also uses comma-separated term slugs instead of IDs, so it's more readable and easier to use when importing products for the first time since it will create terms from the slug.

https://gist.github.com/JiveDig/7abe617b34c5f0ba659269834b9f00c4

@JiveDig thanks for sharing!!

hi all is there any solution for supporting hierarchical taxonomy ??

What about that isn't working? I'm not really maintaining this and am on holiday. I'd probably take a look at JiveDig's adjustment above