$15
Taxonomy parent and child

Hi there,

I'm struggling with taxonomies. Basically I've a custom post type using taxonomies looking like this:

Tax_Parent
- Tax_Child
- Tax_Child
-- Tax_Child2
-- Tax_Child2
- Tax_Child
Tax_Parent
- Tax_Child
-- Tax_Child2
-Tax_Child

So first of all, I'd like a list with only Tax_Parent (but I don't want to "exclude").
And then, I'd like to have a second list but only with Tax_Child and each child should have a rel="Tax_Parent-slug".

Is it possible?

Thanks for your help.

Cheers,

Thomas

Thomas Guillot | 06/17/11 at 8:24am | Edit

(1) Possible Answers Submitted...

Last edited:
06/17/11
8:41am

Michael Fields says:

This is one way of doing it:



<?php



$terms = array();

$_terms = get_terms( 'category' );

foreach( (array) $_terms as $term ) {

	$terms[$term->term_id] = $term;

}



/*

 * List parents.

 */

print "\n\n\n" . '<ul>';

foreach ( $terms as $term ) {

	if ( ! empty( $term->parent ) ) {

		continue;

	}

	print "\n" . '<li><a href="' . esc_url( get_term_link( $term, $term->taxonomy ) ) . '">' . esc_html( $term->name ) . '</li>';

}

print "\n" . '</ul>';





/*

 * List all but "root" terms.

 */

print "\n\n\n" . '<ul>';

foreach( $terms as $term ) {

	if ( empty( $term->parent ) ) {

		continue;

	}

	print "\n" . '<li><a rel="' . esc_attr( $terms[$term->parent]->slug ) . '" href="' . esc_url( get_term_link( $term, $term->taxonomy ) ) . '">' . esc_html( $term->name ) . '</li>';

}

print "\n" . '</ul>';

06/17/11 8:58am

Thomas Guillot says:
Hi Michael,

Thank you for your quick reply.

It's almost perfect but your
List all but "root" terms
displays the children of a child (aka Tax_Child2 in my example) and I only want the 1st level of children.

Cheers,

Thomas

06/17/11 9:02am

Michael Fields says:

No worries. Please try:



$terms = array();

$root_ids = array();

$_terms = get_terms( 'category' );

foreach( (array) $_terms as $term ) {

	$terms[$term->term_id] = $term;

}



/*

 * List root terms.

 */

print "\n\n\n" . '<ul>';

foreach ( $terms as $term ) {

	if ( ! empty( $term->parent ) ) {

		continue;

	}

	$root_ids[] = $term->term_id;

	print "\n" . '<li><a href="' . esc_url( get_term_link( $term, $term->taxonomy ) ) . '">' . esc_html( $term->name ) . '</li>';

}

print "\n" . '</ul>';



/*

 * List all direct descendants of root terms.

 */

print "\n\n\n" . '<ul>';

foreach( $terms as $term ) {

	if ( empty( $term->parent ) ) {

		continue;

	}

	if ( ! in_array( $term->parent, $root_ids ) ) {

		continue;

	}

	print "\n" . '<li><a rel="' . esc_attr( $terms[$term->parent]->slug ) . '" href="' . esc_url( get_term_link( $term, $term->taxonomy ) ) . '">' . esc_html( $term->name ) . '</li>';

}

print "\n" . '</ul>';