Finally Solved my problem My previous code was only for category wise product but when using tag it should be post. for better explain someone can please explain about the whole process.
<?php
$args = array(
'number' => $number,
'orderby' => 'title',
'order' => 'ASC',
'hide_empty' => $hide_empty,
'include' => $ids
);
$product_tags = get_terms( 'product_tag', $args );
$count = count($product_tags);
if ( $count > 0 ){
foreach ( $product_tags as $product_tag ) {
// echo '<h4><a href="' . get_term_link( $product_tag ) . '">' . $product_tag->name . '</a></h4>';
$args = array(
'posts_per_page' => -1,
'tax_query' => array(
'relation' => 'AND',
array(
'taxonomy' => 'product_tag',
'field' => 'slug',
// 'terms' => 'white-wines'
'terms' => $product_tag->slug,
'product_tag'=> "latest-product"
)
),
'post_type' => 'product',
'orderby' => 'title,'
);
$products = new WP_Query( $args );
echo "<ul>";
while ( $products->have_posts() ) {
$products->the_post();
?>
<li>
<a href="<?php the_permalink(); ?>">
<?php the_title(); ?>
<?php echo get_the_post_thumbnail( $post_id, 'thumbnail' ); ?>
</a>
</li>
<?php
}
echo "</ul>";
}
}
?>