WordPress CPT with Taxonomy Custom Fields I

gistfile1.php

//---- CUSTOM POST TYPE - FAQs --------------------------------------------------------

add_action('init', '_init_question_post_type');

function _init_question_post_type() {

	// MAKE POST TYPE
	//---------------------------
	register_post_type( 'question',
		array(
			'labels' => array(
				'name' => __( 'FAQs' ),
				'singular_name' => __( 'FAQ' ),
				'add_new' => __( 'Add New' ),
				'add_new_item' => __( 'Add New FAQ' ),
				'edit' => __( 'Edit' ),
				'edit_item' => __( 'Edit FAQ' ),
				'new_item' => __( 'New FAQ' ),
				'view' => __( 'View FAQ' ),
				'view_item' => __( 'View FAQ' ),
				'search_items' => __( 'Search FAQ' ),
				'not_found' => __( 'No FAQs found' ),
				'not_found_in_trash' => __( 'No FAQs found in Trash' ),
			),
			'public' => true,
			'show_ui' => true,
			'publicly_queryable' => true,
			'exclude_from_search' => false,
			'hierarchical' => false,
			'menu_position' => 20,
			'capability_type' => 'post',
			'menu_icon' => '/assets/images/faq_menu.png',
			'query_var' => true,
			'rewrite' => array( 'slug' => 'about/faqs', 'with_front' => false ),
			'supports' => array('title', 'editor'),
		)
	);
	
	// MAKE PERMALINKS WORK
	//---------------------------
    flush_rewrite_rules();
    
	// MAKE TAXONOMY
	//---------------------------
	register_taxonomy_for_object_type('question', 'question-category');
	register_taxonomy(
		'question-category',
		array( 'question' ),
		array(
			'labels' => array(
				'name' => __( 'FAQ Categories' ),
				'singular_name' => __( 'FAQ Category' ),
				'search_items' => __( 'Search FAQ Categories' ),
				'popular_items' => __( 'Popular FAQ Categories' ),
				'all_items' => __( 'All FAQ Categories' ),
				'parent_item' => __( 'Parent FAQ Category' ),
				'parent_item_colon' => __( 'Parent FAQ Category:' ),
				'edit_item' => __( 'Edit FAQ Category' ),
				'update_item' => __( 'Update FAQ Category' ),
				'add_new_item' => __( 'Add New FAQ Category' ),
				'new_item_name' => __( 'New FAQ Category' ),
			),
			'public' => true,
			'show_in_nav_menus' => true,
			'show_ui' => true,
			'publicly_queryable' => true,
			'exclude_from_search' => false,
			//'rewrite' => array( 'slug' => 'topics', 'with_front' => false ),
			'hierarchical' => true,
			'query_var' => true,
		)
	);
	
	// DEFINE CUSTOM TAXONOMY FIELDS
	//---------------------------
	add_action( 'question-category_edit_form_fields', 'question_category_custom_fields', 10, 2 );
	function question_category_custom_fields($tag) {
	   // Check for existing taxonomy meta for the term you're editing
		$t_id = $tag->term_id; // Get the ID of the term you're editing
		$term_meta = get_option( "taxonomy_term_$t_id" ); // Do the check
		// Get order field value
		$question_category_order = $term_meta['question_category_order'];
		// Default to zero
		if (!$question_category_order) $question_category_order = "1";
		// Get column field value
		$question_category_column = $term_meta['question_category_column'];
		// Default to left
		if (!$question_category_column) $question_category_column = "left";
	?>
	<tr class="form-field">
		<th scope="row" valign="top">
			<label for="question_category_column">Column</label>
		</th>
		<td>
			<select style="width: 100px;" name="term_meta[question_category_column]" id="question_category_column">
				<option value="left" selected="selected">Left</option>
                <option value="right" <?php if ($question_category_column == "right") echo ' selected="selected";'; ?>>Right</option>
			</select>
		</td>
	</tr>
	<tr class="form-field">
		<th scope="row" valign="top">
			<label for="question_category_order">Order</label>
		</th>
		<td>
			<input style="width: 98px;" type="text" name="term_meta[question_category_order]" id="question_category_order" size="2" maxlength="2" value="<?php echo $question_category_order ? $question_category_order : ''; ?>">
		</td>
	</tr>
	<?php
	}
	
	// SAVE CUSTOM TAXONOMY FIELDS
	//---------------------------
	add_action( 'edited_question-category', 'save_question_category_custom_fields', 10, 2 );
	function save_question_category_custom_fields( $term_id ) {
		if ( isset( $_POST['term_meta'] ) ) {
			$t_id = $term_id;
			$term_meta = get_option( "taxonomy_term_$t_id" );
			$cat_keys = array_keys( $_POST['term_meta'] );
				foreach ( $cat_keys as $key ){
				if ( isset( $_POST['term_meta'][$key] ) ){
					$term_meta[$key] = $_POST['term_meta'][$key];
				}
			}
			//save the option array
			update_option( "taxonomy_term_$t_id", $term_meta );
		}
	}
	
	// DEFINE CUSTOM COLUMNS
	//---------------------------
	add_filter("manage_edit-question_columns", "question_define_columns");	
	function question_define_columns($question_columns) {
		$new_columns['cb'] = '<input type="checkbox" />';
		$new_columns['title'] = __('Question');
		$new_columns['question-category'] = __('Category');
		//$new_columns['question-answer'] = __('Answer');
		//$new_columns['author'] = __('Author');
		//$new_columns['comments'] = __('Comments');
		//$new_columns['tags'] = __('Tags');
		//$new_columns['date'] = __('Date');
		//$new_columns['hsm_pagetitle'] = __('Page title');
		//$new_columns['hsm_pagedescription'] = __('Page description');
		return $new_columns;
	}
	
	// POPULATE CUSTOM COLUMNS
	//---------------------------
	add_action('manage_question_posts_custom_column', 'question_fill_columns', 10, 2);
	function question_fill_columns($column_name, $id) {
		global $post;
		switch ($column_name) {
			case 'question-category':
				echo strip_tags(get_the_term_list( $id, 'question-category', '', ', ', '' ));
				break;
			default:
				break;
		}
	}
	
	// SORTABLE COLUMN HEADERS
	//---------------------------
	//add_filter("manage_edit-question_sortable_columns", 'question_sortable_columns');
	//function question_sortable_columns($columns) {
		//$custom = array(
			//'question-category' 	=> 'question-category',
		//);
		//return wp_parse_args($custom, $columns);
	//}	
	
}