Post_type doesn't work for widgets?

Question

I've found almost the same question: https://stackoverflow.com/questions/4796165/multiple-loops-in-wordpress-second-loop-not-resetting but the answer doesn't work for me.

I have "portfolio" post type, and I'm working on widget displaying all portfolio items.

This code works perfectly on page-portfolio:

$loop = new WP_Query( array( 
        'post_type' => 'portfolio',   
        'posts_per_page' => 5 ) );

<?php while ( $loop->have_posts() ) : $loop->the_post(); ?>         
 (...)
<?endwhile?>

But when I implement this in my widgets - the "post_type" field doesn't seem to work. No matter what I type as post type - it always displays POSTS instead of PORTFOLIO ITEMS. Even if the post type doesn't even exist (and as we all know it should display nothing if there's no such post type!).

I believe the problem is aside from my widget there's blog section (loop from loop.php, no code to show, because there's just only "while ( have_posts() ) : the_post();")

[edit]

I may be wrong, deleted every line of code from loop.php and my widget still shows posts.

Any ideas how to fix that?

[edit #2]

Ok, so my site looks just like every normal Wordpress blog:

header.php
loop.php > widget area
footer.php

There is almost no PHP code in header and footer (at least no loops etc.).

The loop.php is also I'd say normal:

 <?php if ( ! have_posts() ) : ?> 
    (...)
    <?php endif; ?> 

    <?php while ( have_posts() ) : the_post(); ?> 
    (...)
    <?php endwhile; ?>  

In fact the widget is ALSO not very unique:

function myWidgetName_load_widgets() {
    register_widget( 'myWidgetName' );
}

class myWidgetName extends WP_Widget {

    function myWidgetName() {
(...)
}

function widget( $args, $instance ) {
        extract( $args );
        $title = apply_filters('widget_title', $instance['title'] );
        $number = $instance['number'];

        echo $before_widget;
        if ( $title )
            echo $before_title . $title . $after_title;
        if ( $number )
    echo "<ul>"; ?>          
        <?php 
     $loopWithSuperUniqueName = new WP_Query( array( 
        'post_type' => 'anything', /* and this doesn't work */   
        'posts_per_page' => 15 ) );
    ?>

     <?php while ( $loopWithSuperUniqueName->have_posts() ) : $loopWithSuperUniqueName->the_post(); ?>  
     <p><?php the_title(); ?></p> /* it always displays POSTS even if 'post_type' => 'alalaaolbadiobladaWhathever' */
     <?php endwhile; ?>  




    <?php echo "</ul>"; ?> 
        <?php
        echo $after_widget;
    }

function update( $new_instance, $old_instance ) {
(...)
}

 function form( $instance ) {  
(...)
}

etc.

The widget's code is OK, because I've developed a few similar widgets and they WORK.

I'm starting to think there's something wrong with Wordpress, not my code.

Answer 1

It sounds like your widget references the global $loop for some reason. This could possibly be due to the internals of the Widget class or due to interference of other plugins, i guess.

As a first step, to be on the safe side, try using a different variable name. The global loop is referred to as $loop, by simply renaming yours to $myloop you can avoid any confusions between global and local.

Secondly, if the trouble persists, test your widget on a 'page' type page. Or any other 'single' page. Does it only show a single row now?

Answer 2

i could solve this problem using wp_reset_query();

at the beginning of the widget