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Get child terms of specific parent from post WordPress

  • SOLVED

Hello,
I have a custom taxonomy (<em>Product Categories</em>) setup for a custom post type (<em>Products</em>) and wish to display the terms of each post individually.

If the PRODUCT is Brand 1 and Type 2 I can display them separately as eg; "This Products Brand is 'Brand 1' and it's type is 'Type 1'"

I can use wp_get_post_terms but not sure how to get child terms within that and separate them. Any Ideas?

My Taxonomy Setup;
<strong>Product Categories</strong>

<strong>Brand</strong>
Brand 1
Brand 2

<strong>Type</strong>
Type 1
Type 2

Many thanks in advance!

Answers (2)

2012-08-11

Baki Goxhaj answers:

Here you go:

$terms = get_the_terms( $post->ID, 'brand' );
if ( !empty( $terms ) ) {
$out = array();
foreach ( $terms as $term ) :
$out[] = '<a href="' .get_term_link($term->slug, $taxonomy) .'">'.$term->name.'</a>';
endforeach;
echo join( ', ', $out );
}


Replicate for "Type" taxonomy.


floy comments:

Using that throws me an error.

Catchable fatal error: Object of class WP_Error could not be converted to string in


floy comments:

Is there someway to use <strong>get_the_terms( $id, $taxonomy )</strong> and refine the output to the child terms of a specific parent?


Baki Goxhaj comments:

Yes, there is a way. The object have a "parent" attribute as part of the data, thus it makes it possible.

Did you figure out the error? It seems fine on my end.

I will work on it now so you have only the children shown up as you describe.


floy comments:

Still getting the error. Not sure why.


Baki Goxhaj comments:

I figured it. Will get with the updated version in a while. Hold on.


Baki Goxhaj comments:

Here you go:

This works for sure because I got the result locally. Please edit those items I've commented. If you don't know how to find the term ID, read this: http://wplancer.com/how-to-find-a-wordpress-category-id/

<?php
$taxonomy = 'category'; // EDIT - put your taxonomy slug. I guess it is "product_category".
$terms = get_the_terms( $post->ID, $taxonomy );

$brand_children = '';
$type_children = '';

foreach ( $terms as $term ) :

if( $term->parent == 1 ) { //EDIT - Put the right ID here.

$brand_children .= '<li><a href="' .get_term_link($term->slug, $taxonomy) .'">'.$term->name.'</a></li>';

} elseif( $term->parent == 3 ) { //EDIT - Put the right ID here.

$type_children .= '<li><a href="' .get_term_link($term->slug, $taxonomy) .'">'.$term->name.'</a></li>';

}

endforeach;

?>
<h3>Brand</h3>
<ul>
<?php echo $brand_children; ?>
</ul>
<h3>Type</h3>
<ul>
<?php echo $type_children; ?>
</ul>


floy comments:

That is EXACTLY what I was after! Your a genius!

I came up with something super similar but just couldn't get the foreach loop to work.

Thanks!


Baki Goxhaj comments:

<blockquote>Your a genius!</blockquote>

Thanks very much for that - it really pays as good as the money. I just focused and got your question right the second time :)

2012-08-11

Albert Shala answers:

Try this:

<?php
$termID = 10;
$taxonomyName = "products";
$termchildren = get_term_children( $termID, $taxonomyName );

echo '<ul>';
foreach ($termchildren as $child) {
$term = get_term_by( 'id', $child, $taxonomyName );
echo '<li><a href="' . get_term_link( $term->name, $taxonomyName ) . '">' . $term->name . '</a></li>';
}
echo '</ul>';
?>


More info here: http://codex.wordpress.org/Function_Reference/get_term_children


floy comments:

That just outputs all the child terms of the custom tax.

I'm after the child terms of a specific parent term from the custom tax from a particular post.


<strong>Product Categories</strong>(CUSTOM TAXONOMY)

<strong>Brand</strong>(Term)
Brand 1(Child Term)
Brand 2(Child Term)

<strong>Type</strong>(Term)
Type 1(Child Term)
Type 2(Child Term)


If the PRODUCT is Brand 1 and Type 2 I can display them separately as eg; "This Products Brand is 'Brand 1' and it's type is 'Type 1'"


Albert Shala comments:

Ok give this a try:



$taxonomyName = "Product Categories";

$parent_terms = get_terms($taxonomyName, array('parent' => 0, 'orderby' => 'slug', 'hide_empty' => false));
echo '<ul>';
foreach ($parent_terms as $pterm) {
//Show the child terms
$terms = get_terms($taxonomyName, array('parent' => $pterm->term_id, 'orderby' => 'slug', 'hide_empty' => false));
foreach ($terms as $term) {
echo '<li><a href="' . get_term_link( $term->name, $taxonomyName ) . '">' . $term->name . '</a></li>';
}
}
echo '</ul>';




floy comments:

Still returning me with ALL the terms instead of the Terms related to the specific post.

Would have to use the <strong>wp_get_post_terms</strong> function im guessing, but im not too sure.