I am needing to create a custom taxonomy structure for my posts. I have read the WP Codex and am confident I can pull that off. My custom taxonomy will be hierarchical.
What I need to do is to create a filter based on this new taxonomy. I need to do this with drop down boxes.
Here is an example of my custom taxonomy will be:
- Artlcles
- Article 1
- Article 2
- Article 3
- Amendments
- Amendment 1
- Amendment 2
- Amendment 3
What I need is to have 2 drop down boxes. The first one will have all of the top level categories (Articles, Amendments, etc...) and then when one of those is selected it will populate/make appear a second drop down with all of the subcategories.
How can I achieve this?
It would not let me post this much code so I have to edit my original question....
This code below is what I have which is on this page http://www.constitutingamerica.org/dev2
<?php $args = array(
'show_option_all' => '',
'show_option_none' => '',
'orderby' => 'ID',
'order' => 'ASC',
'show_count' => 1,
'hide_empty' => 0,
'child_of' => 0,
'parent' => 0,
'exclude' => '',
'echo' => 1,
'selected' => 0,
'hierarchical' => 0,
'name' => 'cat',
'id' => '',
'class' => 'postform',
'depth' => 1,
'tab_index' => 0,
'taxonomy' => 'classification',
'hide_if_empty' => false,
'walker' => ''
);
$tax_menu_items = get_categories( $args ); ?>
<form name="class-filter" method="get" >
<select name="class-dropdown" onchange="document.location.href=this.options[this.selectedIndex].value;">
<option value="">Select</option>
<? foreach ( $tax_menu_items as $tax_menu_item ): ?>
<option value="<?php echo get_term_link($tax_menu_item,$tax_menu_item->taxonomy); ?>"><?php echo $tax_menu_item->name; ?></option>
<?php endforeach; ?>
</select>
<?php
$sub_tax_id = $wp_query->get_queried_object_id();
if(isset($sub_tax_id)) {
$args2 = array(
'show_option_all' => '',
'show_option_none' => '',
'orderby' => 'ID',
'order' => 'ASC',
'show_count' => 1,
'hide_empty' => 0,
'child_of' => 0,
'parent' => $sub_tax_id,
'exclude' => '',
'echo' => 1,
'selected' => 0,
'hierarchical' => 0,
'name' => 'cat',
'id' => '',
'class' => 'postform',
'depth' => 1,
'tab_index' => 0,
'taxonomy' => 'classification',
'hide_if_empty' => false,
'walker' => ''
);
$tax_menu_items2 = get_categories( $args2 ); ?>
<select name="class-dropdown" onchange="document.location.href=this.options[this.selectedIndex].value;">
<option value="">Select</option>
<? foreach ( $tax_menu_items2 as $tax_menu_item2 ): ?>
<option value="<?php echo get_term_link($tax_menu_item2,$tax_menu_item2->taxonomy); ?>"><?php echo $tax_menu_item2->name; ?></option>
<?php endforeach; ?>
</select>
<? } ?>
</form>
I am so close. MY problem is that when the second box is selected it resets the second box to the same parent taxonomy as the first box. How can I get this second drop down to hold all of its original child taxonomies?
