WP:Understanding Custom Post Types and Taxonomies

[Locke]

Hi everyone .

First of all I want to apologize because my grammar will be a litt… very confusing, Second, my knowledge of coding is minute.

I would like to share my experience with this two great options that WordPress Brought to us since version 2.8 ¿¿?? .

I think I failed implementing this or WordPress failed in some important points . I don’t know, you’ll decide…

Let’s start writing about Custom Post Types….

it seems complex to add this kind of options in functions.php to people that doesn’t know anything of php… or etc… (cof cof , designers, like me)

But it’s easier than you thought…Let’s put a example here , We’re going to build a Custom Post Type that we’re going to call: “2010”

Personally I like to add actions at the top of functions.php :

add_action('init', 'season_2010_register');

Then we create the function , adding the parameters to make post types work correctly.:

function season_2010_register() {



$labels = array(

'name' => _x('2010', 'post type general name'),

'singular_name' => _x('2010 Item', 'post type singular name'),

'add_new' => _x('Add New', 'portfolio item'),

'add_new_item' => __('Add New 2010 Item'),

'edit_item' => __('Edit 2010 Item'),

'new_item' => __('New 2010 Item'),

'view_item' => __('View 2010 Item'),

'search_items' => __('Search 2010'),

'not_found' =>  __('Nothing found'),

'not_found_in_trash' => __('Nothing found in Trash'),

'parent_item_colon' => ''

);



$args = array(

'labels' => $labels,

'public' => true,

'publicly_queryable' => true,

'show_ui' => true,

'query_var' => true,

'menu_icon' => get_stylesheet_directory_uri() . '/img/icons/article16.png',

'rewrite' => true,

'capability_type' => 'post',

'hierarchical' => true,

'menu_position' => null,

'supports' => array('title','editor','thumbnail'),

In the same function we add something that came with WP 3.1, the characteristic for adding archives in the post-types ( ‘has_archive =>)

'rewrite' => array(

'slug' => '2010',

'with_front' => false

),



'has_archive' => 'true'

);



register_post_type( '2010' , $args );

flush_rewrite_rules();



}

it’s very easy to add the post-type archives to the template, just add a file in your template , that we must called :

archive-my-post-type.php (obviously you have to change my-post-type to 2010 (that is the post-type name that we are using in this example)

Now we can continue with the Taxonomies: We’re going to create 2 taxonomies

first we add the action:

add_action( 'init', 'create_taxonomies', 0 );

function create_taxonomies()

{



$labels = array(

'name' => _x( 'Movies', 'taxonomy general name' ),

'singular_name' => _x( 'Movies', 'taxonomy singular name' ),

'search_items' =>  __( 'Search in Movies' ),

'all_items' => __( 'All Movies' ),

'parent_item' => __( 'Parent Movies' ),

'parent_item_colon' => __( 'Parent Movies' ),

'edit_item' => __( 'Edit Movies' ),

'update_item' => __( 'Update Movies' ),

'add_new_item' => __( 'Add New Movie' ),

'new_item_name' => __( 'New Movie' ),

'menu_name' => __( 'Movies' ),

);



register_taxonomy('movie',array('2010'), array(

'hierarchical' => true,

'labels' => $labels,

'show_ui' => true,

'query_var' => true,

'rewrite' => array( 'slug' => 'movie','hierarchical' => true ),

));





$labels = array(

'name' => _x( 'Other Worlds', 'taxonomy general name' ),

'singular_name' => _x( 'Other Worlds', 'taxonomy singular name' ),

'search_items' =>  __( 'Search in Other Worlds' ),

'popular_items' => __( 'Popular in Other Worlds ),

'all_items' => __( 'All in Other Worlds' ),

'parent_item' => null,

'parent_item_colon' => null,

'edit_item' => __( 'Edit in Other Worlds' ),

'update_item' => __( 'Update in Other Worlds' ),

'add_new_item' => __( 'Add New Events in Other Worlds' ),

'new_item_name' => __( 'New Event in Other Worlds' ),

'menu_name' => __( 'Other Worlds' ),

);



register_taxonomy('otros','2010',array(

'hierarchical' => true,

'labels' => $labels,

'show_ui' => true,

'query_var' => true,

'rewrite' => array( 'slug' => 'other-worlds','hierarchical' => true ),

));

Let’s add a custom title text only because:

we add the action:

add_action('gettext', 'change_2010_title_text');

function change_2010_title_text ($translation ) {

global $post;

if( isset( $post ) ) {

switch( $post->post_type ){

case '2010' :

if( $translation == 'Enter title here' )

return 'Enter Movie Title Here';

break;

}

}

return $translation;

}

Now the problem came here… We can have a Custom Post Type Archive and get all post of all taxonomies. that’s perfect , because with a good permalink you’ll get:

http://mysite.com/2010/

but what if we want to to have taxonomies archive and have permalinks like_:

http://mysite.com/2010/movies

Well , this is technically impossible with my knowlage ;)

so I solve this with this:
you can either create a custom page in your template with :

/*

Template Name: Movies

*/

?>

or my favorite and clean way to organize your template:

$post = $wp_query->post;



if ( is_page('2') ) {

include(TEMPLATEPATH.'/layouts/about.php');

} elseif ( is_page('268') ) {

include(TEMPLATEPATH.'/layouts/contact.php');

} elseif ( is_page('443') ) {

include(TEMPLATEPATH.'/layouts/taxonomy-movies.php');

} else {

include(TEMPLATEPATH.'/layouts/404.php');

}

?>

you can notice that the page 443 is the one will use to create the custom taxonomy “MOVIES”

Let’s put a parenthesis here.

if we create in the root template the file “taxonomy-movies.php” this will create the template structure for the Taxonomy Terms , not for the taxonomy.

let’s go back in what we were.

In the file tha we created : /layouts/taxonomy-movies.php

we are going to query the post inside the terms of the taxonomy (do I explain myself clearly , I hope so)

how I done this? :

$args = array(

'tax_query' => array(

array(

'taxonomy' => 'movie', // taxonomy

'field' => 'slug', // taxonomy term by('id' or 'slug')

'terms' => 'open-air' // texonomy term

),



array(

'taxonomy' => 'movie', // taxonomy

'field' => 'slug', // taxonomy term by('id' or 'slug')

'terms' => 'meridian' // texonomy term

),

array(

'taxonomy' => 'movie', // taxonomy

'field' => 'slug', // taxonomy term by('id' or 'slug')

'terms' => 'topographic' // texonomy term

)

)

);

query_posts( $args );

?>

The code above is getting the post in the different terms that we added previously in the taxonomy. what we just do is like :

(this is just an example :)

but with WP3.1 we can get the same achieve , but with taxonomies.

then we continue with the loop

 

















Sorry, no posts matched your criteria.

But the sad thing is that the permalink will show like:

http://mysite.com/movies/ (or whatever name you use in the page) instead of http://mysite.com/2010/movies

So I think that I miss something to achieve the taxonomy arhive or Does wordpress miss this??

everybody , please feel free to give feedback , laugh , and share a beer ……

see’a

[Locke]

source:

http://thinkvitamin.com/code/create-your-first-wordpress-custom-post-type/

http://codex.wordpress.org/Function_Reference/WP_Query

http://codex.wordpress.org/Pages

http://ottopress.com/2010/wordpress-3-1-advanced-taxonomy-queries/

http://nielsencreativemedia.com/blog/how-to-develop-a-custom-post-plugin-with-unique-taxonomy-and-tags

[Author]

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