This thread is resolved. Here is a description of the problem and solution.
Problem: I have 3 custom post types - Artists, Books, and Works on Paper. I have two one-to-many (O2M) relationships: Artists-Books where Artist is parent and Book is child, and Artists-Works On Paper where Artist is parent and Work on Paper is child. I'm using the Favorites plugin to allow my site visitors to add favorite Books and favorite Works on Paper. In the list of favorite posts, I would like to display information about the related Artist.
Solution: The best way to handle this is to use the Favorites plugin's filters API to filter the favorites list HTML. You can use the Toolset Post Relationships API toolset_get_related_posts to get information from related posts in that filter callback:
/**
* Toolset Support
* Filter the Favorites list information to display related Artiste info
* Currently supports Livres and Oeuvres Sur Papiers post types for Favorites
* Extendable by adding a case statement for new post type / relationship slug
* https://toolset.com/forums/topic/find-related-custom-post-type/
*/
add_filter( 'favorites/list/listing/html', 'custom_favorites_listing_html', 10, 4 );
function custom_favorites_listing_html($html, $markup_template, $post_id, $list_options)
{
// relationship slugs per favorite post type
$post_type = get_post_type( $post_id );
switch($post_type) {
case "livre":
$rel_slug = "livre_artiste";
break;
case "oeuvre-sur-papier":
$rel_slug = "oeuvre-sur-papier-artiste";
break;
default:
return $html;
};
// Get related posts with Toolset post relationships API
$children_args = [
'query_by_role' => 'parent',
'role_to_return' => 'child'
];
$children = toolset_get_related_posts( $post_id, $rel_slug, $children_args);
// Build a string of related post titles, separated by a comma,
// and concatenate it into response HTML, then return it
$child_titles = [];
if( $children && count( $children ) > 0 ) {
foreach( $children as $child ){
$child_titles[]= get_the_title($child);
}
return $html . implode(',', $child_titles);
}
// in case no related posts are found, return the default HTML
return $html;
}
Relevant Documentation:
https://favoriteposts.com/
https://toolset.com/documentation/customizing-sites-using-php/post-relationships-api/#toolset_get_related_posts
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This topic contains 13 replies, has 2 voices.
Last updated by 3 years, 8 months ago.
Assisted by: Christian Cox.
Okay I found another method. I took a few minutes to review this plugin's documentation, and I found a filter for modifying the AJAX response:
https://favoriteposts.com/
"Customize the Favorites Listing HTML"
Example filter:
add_filter( 'favorites/list/listing/html', 'custom_favorites_listing_html', 10, 4 );
function custom_favorites_listing_html($html, $markup_template, $post_id, $list_options)
{
return $html;
}
This filter gives you access to a $post_id variable, which I found out is the ID of the current Livre post. We can use that to get the related Artiste ID using the post relationships API, or we can use it to modify the View's post relationships query filter. As a quick test, I set up a new custom code snippet in Toolset > Settings > Custom Code to fetch the Artiste post title using the post relationships API:
add_filter( 'favorites/list/listing/html', 'custom_favorites_listing_html', 10, 4 );
function custom_favorites_listing_html($html, $markup_template, $post_id, $list_options)
{
$artistes_args = [
'query_by_role' => 'parent',
'role_to_return' => 'child'
];
$artistes = toolset_get_related_posts( $post_id, 'livre_artiste', $artistes_args);
$art_titles = [];
if( $artistes && count( $artistes ) > 0 ) {
foreach( $artistes as $artiste ){
$art_titles[]= get_the_title($artiste);
}
return $html . implode(',', $art_titles);
}
return $html;
}
That produces the output you can see here in filter-test.png.
what I want is that the visitors can compose a list with books and works on paper
with the name of the artist also for the works on paper,
while for the moment only the books have the name of the artist. (in the picture, look at the last choice in the list which is a work on paper and which does not have the name of the artist)
