get all posts from a custom post type

Question

I'm trying to get all posts from a particular custom post type using the following code:

$auctions = get_posts(array('post_type' => 'auction'));
print_r($auctions);
echo '<select>';
foreach ($auctions as $auction) {
    echo '<option value="' . $auction->ID . '">' . $auction->post_title . '</option>';
}
echo '</select>';

Although the print_r() call shows data, the foreach seems to ignore it and doesn't print anything. Any ideas?

Any help would be appreciated

print_r() output:

Array (
    [0] => WP_Post Object (
        [ID] => 36
        [post_author] => 1
        [post_date] =>    2013-05-19 10:58:45
        [post_date_gmt] => 2013-05-19 08:58:45
        [post_content] =>
        [post_title] => My Title
        [post_excerpt] =>
        [post_status] => publish
        [comment_status] => closed
        [ping_status] => closed
        [post_password] =>
        [post_name] => my-title
        [to_ping] =>
        [pinged] =>
        [post_modified] => 2013-05-24 09:55:53
        [post_modified_gmt] => 2013-05-24 07:55:53
        [post_content_filtered] =>
        [post_parent] => 0
        [guid] => http://domain.com/?post_type=auction&p=36
        [menu_order] => 0
        [post_type] => auction
        [post_mime_type] =>
        [comment_count] => 0
        [filter] => raw
    )   
) 

Answer 1

You can use wp_query() for this to work

$args = array(
        'post_type' => 'auction',
        'posts_per_page' => -1
    );
$query = new WP_Query($args);
if ($query->have_posts()): 
    echo '<select>';
    while ($query->have_posts()): $query->the_post();
            echo '<option value="' . get_the_ID() . '">' . get_the_title() . '</option>';
    endwhile;
    echo '</select>';
    wp_reset_postdata();
endif;

Documentation for WP_Query https://codex.wordpress.org/Class_Reference/WP_Query

Answer 2

Perhaps because get_posts returns an object, you need to setup post data per Codex get_posts. Replacing line 4:

foreach($auctions as $auction) : setup_postdata($auction) { 

Answer 3

Try it without get_posts(). I currently have a similar function that works like this:

$args = array( 'post_type' => 'customPostName', 'post_status' => 'publish');
$pages = get_pages($args);
foreach ( $pages as $page ) {
    // Do something
    }

Edit: Actually I'm not sure why this isn't working since codex clearly says to use echo $post->ID; with get_posts. http://codex.wordpress.org/Function_Reference/get_posts#Access_all_post_data

Does this make any difference for you?

    foreach ($auctions as $auction) {
        $option = '<option value="';
        $option .= $auction->ID;
        $option .= '">';
        $option .= $auction->post_title;
        $option .= '</option>';

        echo $option;

Answer 4

        'post_type' => 'auction',
        'posts_per_page' => -1,
        'post_status' => 'publish',
    );
$query = new WP_Query($args);
if ($query->have_posts() ) : 
    echo '<select>';
    while ( $query->have_posts() ) : $query->the_post();
            echo '<option value="' . get_the_ID() . '">' . get_the_title() . '</option>';
    endwhile;
    echo '</select>';
    wp_reset_postdata();
endif;

@gregory was actually right, but had a few typos... There was a closing ; missing from the array and at the end reset_postdata(); has to become wp_reset_postdata();. This should work just fine now... It works great for me, without any problem! Hope this will help!