MB Relationships - Using each_connected multiple times - Support Fourms

This topic has 3 replies, 2 voices, and was last updated 2 years, 5 months ago by Anh Tran.

Creator

Topic
January 26, 2018 at 9:54 PM #8357
Resolved ecurtain
Participant
I’m having trouble setting up the each_connected multiple times example. My project has three post types – products, groups, manufacturers – and I’ve defined products_to_groups and products_to_manufacturers relations.

The single pages work as expected and correctly display the linked items.

The archive page is where it has problems. I set up the loop:
```
    $my_query = new WP_Query( array( 
        'post_type' => 'products' 
    ) );
```
And get the connected items:
```
    MB_Relationships_API::each_connected( array(
        'id'   => 'products_to_groups',
        'from' => $my_query->posts, 
        'property' => 'connected_groups',
    ) );

    MB_Relationships_API::each_connected( array(
        'id'   => 'products_to_manufacturers',
        'from' => $my_query->posts, 
        'property' => 'connected_manufacturers',
    ) );
```
And try to perform the loop, displaying the connected items:
```
    
    while ( $my_query->have_posts() ) : $my_query->the_post();

        foreach ( $post->connected_groups as $post ) : setup_postdata( $post );
            the_title(); 
        endforeach;
        wp_reset_postdata(); 

        foreach ( $post->connected_manufacturers as $post ) : setup_postdata( $post );
            the_title();  
        endforeach;
        wp_reset_postdata();  

    endwhile; 
```
The first foreach works and shows the connected groups. The second fails with an “invalid argument” warning. If I switch the inner foreach loops, the first succeeds & the second fails again.

What am I doing wrong? Thanks!
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January 29, 2018 at 8:46 AM #8375

Anh Tran
Keymaster

Hello,

I’ve just tested again with a similar code and here is my result:

View post on imgur.com

Can you check your code again please?

January 29, 2018 at 11:26 PM #8388

ecurtain
Participant

Hello Anh,

Thanks for your reply. I had a hard time following the animated gif because it zips through the code quickly. May I suggest you post the code from the gif as an example? It would be much easier to read.

I’m afraid I’m unable to get it to work – I’m getting the same foreach warnings.
For now, I’ll need to keep using my current solution.

January 31, 2018 at 2:13 PM #8410
Anh Tran
Keymaster
No problem. Here is the code for registering relationships:
```
add_action( 'mb_relationships_init', function () {
	MB_Relationships_API::register( array(
		'id'   => 'posts_to_pages',
		'from' => 'post',
		'to'   => 'page',
	) );
	MB_Relationships_API::register( array(
		'id'   => 'posts_to_posts',
		'from' => 'post',
		'to'   => 'post',
	) );
} );
```
And here is the code to fetch connections (in index.php file):
```
global $wp_query;
MB_Relationships_API::each_connected( array(
	'id'       => 'posts_to_pages',
	'from'     => $wp_query->posts,
	'property' => 'connected_pages',
) );

MB_Relationships_API::each_connected( array(
	'id'       => 'posts_to_posts',
	'to'       => $wp_query->posts,
	'property' => 'connected_posts',
) );
```
Here is the code in the content.php file:
```
foreach ( $post->connected_pages as $post ) : setup_postdata( $post );
	the_title();
endforeach;
wp_reset_postdata();

echo '<hr>';

foreach ( $post->connected_posts as $post ) : setup_postdata( $post );
	the_title();
endforeach;
wp_reset_postdata();
```
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MB Relationships – Using each_connected multiple times