woocommerce_wp_select options array from product attribute terms

Question

I am trying to create a drop down list box in woocommerce but have it populated with data from the database.

I have the majority of the code working but the portion to populate the list box is killing me. This is what I have so far.

add_action( 'woocommerce_product_options_general_product_data', 'woo_add_custom_general_fields' ); // Display Extra Fields on General Tab Section


add_action( 'woocommerce_process_product_meta', 'woo_add_custom_general_fields_save' ); // Save Fields

function woo_add_custom_general_fields() {
    global $woocommerce, $post, $product;
    echo '<div class="options_group">';

    // Select

    $options = array(
        'hide_empty' => false,
        'order' => 'ASC',
        'fields' => 'names'
        );
    $DogBreeds = get_terms('pa_breed', $options);

    foreach ($DogBreeds as $key => $value) {
        $theArray = "'{$value}'  => __( '{$value}' , 'woocommerce' ), ";
    }

    woocommerce_wp_select( 
        array( 
            'id'      => '_select', 
            'label'   => __( 'My Select Field', 'woocommerce' ),
            'options' =>  $theArray //this is where I am having trouble
            )
        );

        echo $theArray;
        echo '<pre>';
        var_dump($DogBreeds);
        echo '</pre>';

    echo '</div>';
}

// Save Fields
    function woo_add_custom_general_fields_save( $post_id ){

    // Select
        $woocommerce_select = $_POST['_select'];
        if( !empty( $woocommerce_select ) )
            update_post_meta( $post_id, '_select', esc_attr( $woocommerce_select ) );
        else {
            update_post_meta( $post_id, '_select',  Null );
        }
    }

This should pull information from the "ATTRIBUTES" section in WooCommerce. I created a Breed Attribute and put a few dog breeds in there.

Any direction is greatly appreciated!

I know the 'options' section on the array is totally wrong but I put it there so you would know what I am trying to accomplish.

Answer 1

I have revisited your code a bit. The main problem was in the select <option> array.

You will see in the code the changes:

// Display Extra Fields on General Tab Section
add_action( 'woocommerce_product_options_general_product_data', 'woo_add_custom_general_fields' );
function woo_add_custom_general_fields() {
    global $post;

    // Set HERE the product attribute taxonomy
    $taxonomy = 'pa_breed';

    // Get the selected value  <== <== (updated)
    $value = get_post_meta( $post->ID, '_select', true );
    if( empty( $value ) ) $value = '';

    $dog_breeds = get_terms( $taxonomy, array(
        'hide_empty' => false,
        'order' => 'ASC',
        'fields' => 'names'
    ) );

    $options[''] = __( 'Select a value', 'woocommerce'); // default value

    foreach ($dog_breeds as $key => $term)
        $options[$term] = $term; //  <===  <===  <===  Here the correct array

    echo '<div class="options_group">';

    woocommerce_wp_select( array(
        'id'      => '_select',
        'label'   => __( 'My Select Field', 'woocommerce' ),
        'options' =>  $options, //this is where I am having trouble
        'value'   => $value,
    ) );

    echo '</div>';
}

// Save Fields
add_action( 'woocommerce_process_product_meta', 'woo_add_custom_general_fields_save' );
function woo_add_custom_general_fields_save( $post_id ){

// Select
    $woocommerce_select = $_POST['_select'];
    if( !empty( $woocommerce_select ) )
        update_post_meta( $post_id, '_select', esc_attr( $woocommerce_select ) );
    else {
        update_post_meta( $post_id, '_select',  '' );
    }
}

Code goes in function.php file of your active child theme (or theme) or also in any plugin file.

Tested in WooCommerce 3+ and works. You will get something similar to this (with your breeds):

Answer 2

This will work for sure:

woocommerce_wp_select(array(
    'id' => '_select',
    'label' => __('My Select Field', 'woocommerce'),
    'options' => array(
        'red' => 'Red',
        'blue' => 'Blue'
    ),
));