Step 1. Adding custom columns-
The first step in creating custom columns, is to make these columns available on the edit posts page. WordPress has a variable filter hook for this called manage_edit-{$post_type}_columns for all post types. Since the name of our post type is movie, the name of the hook you’d use is manage_edit-movie_columns.
What we’ll do here is overwrite all of the default columns and set it up however we want. In this example, we’re using five columns:
1. cb: The checkbox column.
2. title: The post title column, which we’re changing to read “Movie.”
3. duration: The column for the duration of the movie (custom metadata).
4. family: The column for the movie family (custom taxonomy).
5. date: The default post date column.
Filtering these columns is fairly simple. You only need to return an array of key/value pairs. The key is the column name and the value is the output of the column header/label.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | add_filter( 'manage_edit-movie_columns', 'my_edit_movie_columns' ) ;
function my_edit_movie_columns( $columns ) {
$columns = array(
'cb' => '<input type="checkbox">',
'title' => __( 'Movie' ),
'duration' => __( 'Duration' ),
'family' => __( 'Family' ),
'date' => __( 'Date' )
);
return $columns;
}
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Step 2.Adding content to custom columns
The action hook in this case is manage_{$post_type}_posts_custom_column. Remember, the name of the post type is movie, so this hook becomes manage_movie_posts_custom_column.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | add_action( 'manage_movie_posts_custom_column', 'my_manage_movie_columns', 10, 2 );
function my_manage_movie_columns( $column, $post_id ) {
global $post;
switch( $column ) {
case 'duration' :
$duration = get_post_meta( $post_id, 'duration', true );
if ( empty( $duration ) )
echo __( 'Unknown' );
else
printf( __( '%s minutes' ), $duration );
break;
case 'family' :
$terms = get_the_terms( $post_id, 'family' );
if ( !empty( $terms ) ) {
$out = array();
foreach ( $terms as $term ) {
$out[] = sprintf( '<a href="%s">%s</a>',
esc_url( add_query_arg( array( 'post_type' => $post->post_type, 'family' => $term->slug ), 'edit.php' ) ),
esc_html( sanitize_term_field( 'name', $term->name, $term->term_id, 'family', 'display' ) )
);
}
echo join( ', ', $out );
}
else {
_e( 'No familys' );
}
break;
default :
break;
}
}
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Step 3. (If you want to ) Making custom columns sortable
The first step is making the duration column sortable by filtering the manage_edit-{$post_type}_sortable_columns hook as shown in the following code.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | add_filter( 'manage_edit-movie_sortable_columns', 'my_movie_sortable_columns' );
function my_movie_sortable_columns( $columns ) {
$columns['duration'] = 'duration';
return $columns;
}
add_action( 'load-edit.php', 'my_edit_movie_load' );
function my_edit_movie_load() {
add_filter( 'request', 'my_sort_movies' );
}
function my_sort_movies( $vars ) {
if ( isset( $vars['post_type'] ) && 'movie' == $vars['post_type'] ) {
if ( isset( $vars['orderby'] ) && 'duration' == $vars['orderby'] ) {
$vars = array_merge(
$vars,
array(
'meta_key' => 'duration',
'orderby' => 'meta_value_num'
)
);
}
}
return $vars;
}
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Enjoy :)
