Product query results are not correct - wordpress

Question

I need a custom fields on the inventory tab that will be filled in with the zipcode as the location of the agent.
Armed with the references I got here, now I have that field.
what I want to ask is how to concatenate this meta data with woocommerce shortcode?
I think like :
['products limit="12" columns="4" zipcode="12345"]
where "12345" will be changing dynamically as needed (zipcode filled based on agent location).
I have tried to do something but it is not working properly.
Here's the full code.
function action_woocommerce_product_options_inventory_product_data_zipcode() {
woocommerce_wp_text_input( array(
'id' => '_zipcode',
'label' => __( 'Zipcode', 'woocommerce' ),
'description' => __( 'Please fill your zipcode.', 'woocommerce' ),
'desc_tip' => 'true',
'placeholder' => __( '12345', 'woocommerce' )
) );
}
add_action( 'woocommerce_product_options_inventory_product_data', 'action_woocommerce_product_options_inventory_product_data_zipcode' );
// Save zipcode
function action_woocommerce_admin_process_product_object_zipcode( $product ) {
// Isset
if ( isset( $_POST['_zipcode'] ) ) {
// Update
$product->update_meta_data( '_zipcode', sanitize_text_field( $_POST['_zipcode'] ));
}
}
add_action( 'woocommerce_admin_process_product_object', 'action_woocommerce_admin_process_product_object_zipcode', 10, 1 );
Try put to shortcode products :
function filter_shortcode_atts_products_zipcode ( $out, $pairs, $atts, $shortcode) {
if ( isset ( $atts['zipcode'] ) && !empty($atts['zipcode']) ) {
$out['zipcode'] = true;
} else {
$out['zipcode'] = false;
}
return $out;
}
add_filter( 'shortcode_atts_products', 'filter_shortcode_atts_products_zipcode', 10, 4);
function filter_woocommerce_shortcode_products_query_zipcode( $query_args, $atts, $type) {
if ( $type == 'products' && $atts['zipcode'] ) {
// Meta query
$query_args['meta_query'] = array(
array(
'key' => '_zipcode',
'value' => $atts['zipcode'],
'compare' => 'LIKE',
)
);
}
return $query_args;
}
add_filter( 'woocommerce_shortcode_products_query', 'filter_woocommerce_shortcode_products_query_zipcode', 10, 3 );
On testing I tried :
['products limit="12" columns="4" zipcode="12345"]
shortcode has displayed the product but does not refer to the postal code in the short code ("12345") but to all products that have a postal code.
Can somebody help me?
Thank you

Answer 1

Something doesn't feel right about the shortcode attribute function. I think you're setting the attribute as true and therefore it's comparing anything "truthy." Maybe just try setting the true one as the zipcode, like this:
function filter_shortcode_atts_products_zipcode ( $out, $pairs, $atts, $shortcode) {
if ( isset ( $atts['zipcode'] ) && !empty($atts['zipcode']) ) {
$out['zipcode'] = $atts['zipcode'];
} else {
$out['zipcode'] = false;
}
return $out;
}
That way it'll return the zipcode if it exists, and false if it doesn't, which the query can then use for the comparison.