In wordpress how to get post loop inside another loop - php

Question

I want to get latest post based on author loop.
this is my code:
function display_artist_func() {
$out_args = array(
'post_type' => 'product',
'author' => 1,
'showposts' => 3
);
$out_loop = new WP_Query($out_args);
while ($out_loop->have_posts()) :
?>
<div><?php echo get_avatar( get_the_author_email(), '80' ); ?> </div>
<?php
//$product = wc_get_product( $product->id );
$args = array(
'post_type' => 'product',
'showposts' => 10,
'orderby' => 'date',
'order' => 'DESC'
);
$loop = new WP_Query( $args );
while ( $loop->have_posts() ) : $loop->the_post(); global $product;$author = get_user_by( 'id', $product->post->post_author ); ?>
<li>
<?php
if ( has_post_thumbnail( $loop->post->ID ) )
echo get_the_post_thumbnail( $loop->post->ID, 'shop_catalog' );
else
echo '<img src="' . woocommerce_placeholder_img_src() . '" alt="Placeholder" width="65px" height="115px" />';
?>
<h3><?php the_title(); ?></h3>
<h4><?php echo $author->display_name;?></h4>
<div><?php echo get_avatar( get_the_author_email(), '80' ); ?> </div>
<?php
//echo $product->get_price_html();
//woocommerce_template_loop_add_to_cart( $loop->post, $product );
?>
</li>
<?php
endwhile;
endwhile;
wp_reset_query();
}
add_shortcode( 'display_artist', 'display_artist_func' );
there is 2 loop:
outside loop get the 3 author.
inside loop get the 3 post based on author from outside loop.
in outside loop a want to display author avatar.
but this code not work.

Answer 1

Your problem is that you're never setting up the post data in your outer loop. It looks to me like this code creates an endless loop? The function get_the_author_email() is actually deprecated, but what its doing is using global $authordata.
In your inner loop, you call:
$loop->the_post();
which is going to take your current query, setup postdata for the active post and then remove it so it no longer returns in your call to have_posts(). You're missing a call to:
$out_loop->the_post();
And so your postdata isn't setup, and you're going to create an endless loop.
NOW with all that said
To be perfectly honest your code doesn't look like it makes a lot of sense. Your 'outer loop' is querying products with one specific hard-coded author ID, but the only thing that outer post is used for IS to get the author email. The way its written - the author is going to be the same for every run of $out_loop.
So I think you still may be missing some logic here - I don't know from your description exactly how its supposed to work, but as is - if you're just looping through products, there's no need for two loops here.