Woocommerce - Product loop, filtering by variation attribute

Question

I’m creating a filter to list products that have the day or night option, selected within a range. I got a loop that comes very close, but is bringing all the products that has class variation, regardless of the value of select. The idea is to bring only products that have the daytime option selected within the class variation. Can someone give me a help please?

Follows the code:

$args = array(
    'posts_per_page' => -1,
    'post_type' => 'product',
    'post_status' => 'publish',
    'tax_query' => array(
        array(
            'taxonomy' => 'pa_turmas',
            'field' => 'periodo',
            'terms' => 'noturno'
        )
    )
);

Answer 1

php displays woocommercer category products. opa blz friend went through a similar difficulty after much research found this sources List only wp category products

My Code stays like this

       $args =

       array (
        'post_type' => 'product',
        'per_page' => '12',
        'columns' => '4',
        'orderby' => 'title',
        'order' => 'asc',
        'product_cat' =>'secadores',
      //  'tag_ID' => '116'
    );

 /*    array(
        'post_type' => 'product',
        'posts_per_page' => 6,
        'orderby' => 'rand'
        );    

        */

     $loop = new WP_Query( $args ); 

   /*     $loop = new WP_Query( $args ); */
        if ( $loop->have_posts() ) {
          //  while ( $loop->have_posts() ) : $loop->the_post(); global $product;
            while ( $loop->have_posts() ) : $loop->the_post();  ?>

            <li style="width: 33.0%!important;" class="product type-product status-publish has-post-thumbnail product_cat-mesa-de-sinuca-e-jantar product_cat-mesa-de-sinuca-personalizada first instock sold-individually shipping-taxable purchasable product-type-simple">    

            <a href="<?php echo get_permalink( $loop->post->ID ) ?>" title="<?php echo esc_attr($loop->post->post_title ? $loop->post->post_title : $loop->post->ID); ?>">

                <?php woocommerce_show_product_sale_flash( $post, $product ); ?>
                <?php 
                    if (has_post_thumbnail( $loop->post->ID )) 
                        echo get_the_post_thumbnail($loop->post->ID, 'shop_catalog');                                               
                    else echo '<img class="attachment-shop_catalog size-shop_catalog wp-post-image" src="'.woocommerce_placeholder_img_src().'" alt="Placeholder" width="300px" height="255px" />'; 
                ?>
            </a>    
            <div class="collection_desc clearfix">
                <a href="<?php echo get_permalink( $loop->post->ID ) ?>" class="collection_title">
                    <h3><?php the_title(); ?></h3>
                </a>                                        
            </div>
            <div class='row'> 
                <div class=''>                                  
                    <div class=' custom-title-product'>
                        <a href=".$link.">
                            <h3 class='custom-title-product'><?php echo $title ?></h3>
                        </a>                        
                    </div>
            <div class='text-center custom-value'>
                <span>                              
                    <?php echo $currency . $valor ?>
                </span>
            </div>
            <div class='text-center'> 
                <span class='custom-inf-parcela '> ou em até <?php echo $qt_parcela ?> x de </span> 
                <span class='custom-valor-parcela'>  R$ <?php echo $parcela ?> </span> 
                <span class='custom-inf-parcela '> na entrega </span>
            </div>
            <div class='text-center'>
                <span class='custom-inf-parcela '> ou apenas </span>
                <span class='custom-valor-parcela'> R$ <?php echo $avista ?> </span>
                <span class='custom-inf-parcela '> à vista na entrega <span>
            </div>
        </div>
        </li>                           
    <?php endwhile; ?>
    <?php wp_reset_query(); ?>
</ul><!--/.products-->      
  <?php          
         //   wc_get_template_part( 'content', 'product' );
         //    endwhile;
        } else {
           echo __( 'No products found' );
        }
        //  wp_reset_postdata();
            ?>
            </ul><!--/.products-->