There are many reference articles about posts and custom post types in WordPress management screen customization, but there was little customization information on the term list screen, so I summarized it.
In particular, the ability to add a term list refinement is a must-see.
Prerequisites
- Verified WordPress version is 5.7.1.
- The term used is the category of the post.
- We are using Advanced Custom Fields PRO to add input fields to the term.
The items you added are being narrowed down.
As an example, a custom field called "Authentication" is set, and the values "OK (OK)", "NG (ng)" and "unconfirmed" can be selected by Select.
Add a column to the term list
function add_taxonomy_category_columns($columns)
{
$column_slug = $columns['slug'];
$column_posts = $columns['posts'];
unset($columns['slug']);
unset($columns['posts']);
$columns['authentication'] = __('Authentication');
$columns['slug'] = $column_slug;
$columns['posts'] = $column_posts;
return $columns;
}
add_filter('manage_edit-category_columns', 'add_taxonomy_category_columns');
function custom_taxonomy_category_column($content, $column_name, $term_id)
{
if ($column_name == 'authentication') {
$authentication = get_term_meta($term_id, 'authentication', true);
switch ($authentication) {
case 'ok':
echo '<span class="fc-ok">'. __('OK'). '</span>';
break;
case 'ng':
echo '<span class="fc-ng">'. __('NG'). '</span>';
break;
case 'unconfirmed':
default:
echo '<span class="fc-unconfirmed">'. __('unconfirmed'). '</span>';
}
}
}
add_action('manage_category_custom_column', 'custom_taxonomy_category_column', 10, 3);add_taxonomy_category_columns
Use this function to set the column headings for a list. $columns['slug'] unset $columns['posts'] to change the order of the columns.
add_filter('manage_edit-category_columns', 'add_taxonomy_category_columns');
When using this filter, the "manage_edit-category_columns" part becomes "manage_edit-{Term Slug} _columns".
When setting it as a tag of a post, it will be "manage_edit-post_tag_columns".
custom_taxonomy_category_column
This function specifies what is displayed in each row of the term list. The display is sorted according to the contents contained in the custom field.
add_action('manage_category_custom_column', 'custom_taxonomy_category_column', 10, 3);
When using this filter, the "manage_category_custom_column" part becomes "manage_{Term Slug}_custom_column".
When setting it as a tag of a post, it becomes "manage_post_tag_custom_column".
Add a filter at the top of the term list
function views_edit_category($views)
{
$post_type = 'post';
$taxonomy = 'category';
$types = array(
array('authentication' => NULL),
array('authentication' => 'ok'),
array('authentication' => 'ng'),
array('authentication' => 'unconfirmed')
);
remove_filter('pre_get_terms', 'pre_get_terms_edit_category');
foreach ($types as $type) {
$query = array(
Specify taxonomy (custom classification)
'taxonomy' => array($taxonomy),
Also get terms without posts (categories with custom taxonomies)
'hide_empty' => false,
'fields' => 'count',
);
if ($type['authentication']) {
$query['meta_query'] = array(
array(
'key' => 'authentication',
'value' => $type['authentication'],
)
);
}
$result = get_terms($query);
if ($type['authentication'] == NULL):
$class = (empty($_GET['authentication'])) ? ' class="current"' : '';
$views['all'] = sprintf(__('<a href="%s"' . $class . '>' . __('All') . ' <span class="count">(%d)</span></ a>', 'all'),
admin_url('edit-tags.php?taxonomy='. $taxonomy. '&post_type='. $post_type),
$result);
elseif ($type['authentication'] == 'ok'):
$class = (!empty($_GET['authentication']) && $_GET['authentication'] == 'ok') ? ' class="current"' : '';
$views['ok'] = sprintf(__('<a href="%s"' . $class . '>' . __('OK') . ' <span class="count">(%d)</span></ a>', 'publish'),
admin_url('edit-tags.php?taxonomy='. $taxonomy. '&post_type='. $post_type. '&authentication=' . $type['authentication']),
$result);
elseif ($type['authentication'] == 'ng'):
$class = (!empty($_GET['authentication']) && $_GET['authentication'] == 'ng') ? ' class="current"' : '';
$views['ng'] = sprintf(__('<a href="%s"' . $class . '>' . __('NG') . ((sizeof($result) > 1) ? "s" : "") . ' <span class="count">(%d)</span></a>', 'draft'),
admin_url('edit-tags.php?taxonomy='. $taxonomy. '&post_type='. $post_type. '&authentication=' . $type['authentication']),
$result);
elseif ($type['authentication'] == 'unconfirmed'):
$class = (!empty($_GET['authentication']) && $_GET['authentication'] == 'unconfirmed') ? ' class="current"' : '';
$views['unconfirmed'] = sprintf(__('<a href="%s"' . $class . '>' . __('unconfirmed') . ' <span class="count">(%d)</span ></a>', 'pending'),
admin_url('edit-tags.php?taxonomy='. $taxonomy. '&post_type='. $post_type. '&authentication=' . $type['authentication']),
$result);
endif;
}
add_filter('pre_get_terms', 'pre_get_terms_edit_category');
return $views;
}
add_filter('views_edit-category', 'views_edit_category');
function pre_get_terms_edit_category($query)
{
if(is_admin() && (!get_current_screen() || get_current_screen()->id != 'edit-tag')) {
return;
}
if ($_GET['authentication']) {
$meta_query = array(
array(
'key' => 'authentication',
'value' => $_GET['authentication'],
)
);
$query->query_vars['meta_query'] = $meta_query;
}
}
add_filter('pre_get_terms', 'pre_get_terms_edit_category');views_edit_category($views)
Use this function to display the filters at the top of the term list.
The points are remove_filter('pre_get_terms', ' pre_get_terms_edit_category'); and add_filter(' pre_get_terms', 'pre_get_terms_edit_ category'); Are.
Remove the filters described below before proceeding, and add them at the end.
This filter is because it affects the main_query and gets in the way of processing.
add_filter('views_edit-category', 'views_edit_category');
When using this filter, the "views_edit-category" part becomes "views_edit-{term slug}".
When setting it as a tag of a post, it becomes "views_edit-post_tag".
pre_get_terms_edit_category($query)
This function will narrow down the term list.
If a parameter exists that you want to use for refinement, add a refiner to $query->query_vars['meta_query'] .
add_filter('pre_get_terms', 'pre_get_terms_edit_category');
This filter interrupts processing before getting the term list. Set refiner criteria at that time.
Reference site
