How to use variation and add-to-cart button outside woocommerce loop - php

Question

I'm using woocommerce for my website, but as I only have one main product and two accessories (related products), I don't need a classic shop page, neither single-product pages for each of my product. My main product has a color variation.
I want to have an add-to-cart button, with the color variation dropdown and the quantity field in one of my regular post page. Exactly like on a single-product page, but embedded in my own page, and without the parts of the single-product page I don't need (description, ...).
I finally decided to achieve this using two custom shortcodes I created: [my_vc_product_price id="xxx"] and [my_vc_add2cart_variable_product id="xxx"]. So I can put them where I want.
But my problem is that the behavior of the dropdown menu + variation availability + add-to-cart button is not the same that this elements have in the single-product page:
- the availability of he variation doesn't show up when I choose the color in the dropdown menu;
- the add-to-cart button is not disable when no color is chosen in the dropdown menu (it should be disable and active only when a color is chosen).
Displaying the price was easy, using some code found on internet:
/**
* Add shortcode to allow to display product price in a page
*/
function my_vc_display_product_price( $args ) {
$product_id = $args['id'];
$product = wc_get_product( $product_id );
echo '<p class="price">' . $product->get_price_html() . '</p>';
}
add_shortcode( 'my_vc_product_price', 'my_vc_display_product_price');
To get the same graphical result, I just had to add some CSS classes on the row: "woocommerce" and "product".
The code to display the dropdown menu + the quantity and the add-to-cart button is almost the same than in the variable.php file found in plugins/woocommerce/templates/single-product/add-to-cart/. The only things really change is that you need to get the "variation attributes" of the product, and not the attributes.
$attributes = $product->get_variation_attributes();
$attribute_keys = array_keys( $attributes );
So the full function code is:
/**
* Add shortcode to allow to display an add to cart button with dropdown menu for variation attributes
*/
function my_vc_add_to_cart_button_variable_product( $args ) {
global $product;
$product_id = $args['id'];
$product = wc_get_product( $product_id );
if( $product->is_type( 'variable' )) {
$attributes = $product->get_variation_attributes();
$attribute_keys = array_keys( $attributes );
$available_variations = array( $product->get_available_variations() );
do_action( 'woocommerce_before_add_to_cart_form' ); ?>
<form class="variations_form cart" method="post" enctype='multipart/form-data' data-product_id="<?php echo absint( $product->get_id() ); ?>" data-product_variations="<?php echo htmlspecialchars( wp_json_encode( $available_variations ) ) ?>">
<?php do_action( 'woocommerce_before_variations_form' ); ?>
<?php if ( empty( $available_variations ) && false !== $available_variations ) : ?>
<p class="stock out-of-stock"><?php _e( 'This product is currently out of stock and unavailable.', 'woocommerce' ); ?></p>
<?php else : ?>
<table class="variations" cellspacing="0">
<tbody>
<?php foreach ( $attributes as $attribute_name => $options ) : ?>
<tr>
<td class="value">
<?php
$selected = isset( $_REQUEST[ 'attribute_' . sanitize_title( $attribute_name ) ] ) ? wc_clean( stripslashes( urldecode( $_REQUEST[ 'attribute_' . sanitize_title( $attribute_name ) ] ) ) ) : $product->get_variation_default_attribute( $attribute_name );
wc_dropdown_variation_attribute_options( array( 'options' => $options, 'attribute' => $attribute_name, 'product' => $product, 'selected' => $selected ) );
?>
</td>
</tr>
<?php endforeach;?>
</tbody>
</table>
<?php do_action( 'woocommerce_before_add_to_cart_button' ); ?>
<div class="single_variation_wrap">
<?php
/**
* woocommerce_before_single_variation Hook.
*/
do_action( 'woocommerce_before_single_variation' );
/**
* woocommerce_single_variation hook. Used to output the cart button and placeholder for variation data.
* #since 2.4.0
* #hooked woocommerce_single_variation - 10 Empty div for variation data.
* #hooked woocommerce_single_variation_add_to_cart_button - 20 Qty and cart button.
*/
do_action( 'woocommerce_single_variation' );
?>
<script type="text/template" id="tmpl-variation-template">
<div class="woocommerce-variation-description">{{{ data.variation.variation_description }}}</div>
<div class="woocommerce-variation-price">{{{ data.variation.price_html }}}</div>
<div class="woocommerce-variation-availability">{{{ data.variation.availability_html }}}</div>
</script>
<script type="text/template" id="tmpl-unavailable-variation-template">
<p><?php _e( 'Sorry, this product is unavailable. Please choose a different combination.', 'woocommerce' ); ?></p>
</script>
<?php
/**
* woocommerce_after_single_variation Hook.
*/
do_action( 'woocommerce_after_single_variation' );
?>
</div>
<?php do_action( 'woocommerce_after_add_to_cart_button' ); ?>
<?php endif; ?>
<?php do_action( 'woocommerce_after_variations_form' ); ?>
</form>
<?php
do_action( 'woocommerce_after_add_to_cart_form' );
}
}
add_shortcode( 'my_vc_add2cart_variable_product', 'my_vc_add_to_cart_button_variable_product');
Any idea what is going wrong? I don't understand, if the code is the same, why it didn't execute the same. Is there something missing because this code is outside woocommerce pages?

Answer 1

try using following code
function add_to_cart_form_shortcode( $atts ) {
if ( empty( $atts ) ) {
return '';
}
if ( ! isset( $atts['id'] ) && ! isset( $atts['sku'] ) ) {
return '';
}
$args = array(
'posts_per_page' => 1,
'post_type' => 'product',
'post_status' => 'publish',
'ignore_sticky_posts' => 1,
'no_found_rows' => 1,
);
if ( isset( $atts['sku'] ) ) {
$args['meta_query'][] = array(
'key' => '_sku',
'value' => sanitize_text_field( $atts['sku'] ),
'compare' => '=',
);
$args['post_type'] = array( 'product', 'product_variation' );
}
if ( isset( $atts['id'] ) ) {
$args['p'] = absint( $atts['id'] );
}
$single_product = new WP_Query( $args );
$preselected_id = '0';
if ( isset( $atts['sku'] ) && $single_product->have_posts() && 'product_variation' === $single_product->post->post_type ) {
$variation = new WC_Product_Variation( $single_product->post->ID );
$attributes = $variation->get_attributes();
$preselected_id = $single_product->post->ID;
$args = array(
'posts_per_page' => 1,
'post_type' => 'product',
'post_status' => 'publish',
'ignore_sticky_posts' => 1,
'no_found_rows' => 1,
'p' => $single_product->post->post_parent,
);
$single_product = new WP_Query( $args );
?>
<script type="text/javascript">
jQuery( document ).ready( function( $ ) {
var $variations_form = $( '[data-product-page-preselected-id="<?php echo esc_attr( $preselected_id ); ?>"]' ).find( 'form.variations_form' );
<?php foreach ( $attributes as $attr => $value ) { ?>
$variations_form.find( 'select[name="<?php echo esc_attr( $attr ); ?>"]' ).val( '<?php echo esc_js( $value ); ?>' );
<?php } ?>
});
</script>
<?php
}
$single_product->is_single = true;
ob_start();
global $wp_query;
$previous_wp_query = $wp_query;
$wp_query = $single_product;
wp_enqueue_script( 'wc-single-product' );
while ( $single_product->have_posts() ) {
$single_product->the_post()
?>
<div class="single-product" data-product-page-preselected-id="<?php echo esc_attr( $preselected_id ); ?>">
<?php woocommerce_template_single_add_to_cart(); ?>
</div>
<?php
}
$wp_query = $previous_wp_query;
wp_reset_postdata();
return '<div class="woocommerce">' . ob_get_clean() . '</div>';
}
add_shortcode( 'add_to_cart_form', 'add_to_cart_form_shortcode' );
/*Example Usage [add_to_cart_form id=147]*/

Answer 2

That's just perfect! Many thanks.
Now the hardest to come: I need to understand your code and compare it with mine ;-)