WP insert post and custom taxonomy

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I have create a custom post type in my WordPress attached with a custom taxonomy.

The post collect date from the from end of the web site by using wp_insert_post().

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This is my Custom post registration code: 

$labels = array(
        'name' => 'Films',
        'singular_name' => 'Film',
        'add_new' => 'Add new',
        'add_new_item' => 'Add new film',
        'edit_item' => 'Edit film',
        'new_item' => 'New film',
        'all_items' => 'All films',
        'view_item' => 'View film',
        'search_items' => 'Search films',
        'not_found' =>  'No films found',
        'not_found_in_trash' => 'No films found in Trash', 
        'parent_item_colon' => '',
        'menu_name' => 'Films'
    );

    $args = array(
        'labels' => $labels,
        'public' => true,
        'publicly_queryable' => true,
        'show_ui' => true, 
        'show_in_menu' => true, 
        'query_var' => true,
        'rewrite' => true,
        'capability_type' => 'post',
        'has_archive' => true, 
        'hierarchical' => false,
        'menu_position' => null,
        'taxonomies' => array('film_category'),
        'supports' => array(
            'title',
            'editor'
        )
    );

    register_post_type('film', $args);

And this is my Custom Taxonomy registration Code: 

$labels = array(
        'name' => 'Category',
        'singular_name' => 'Film',
        'search_items' =>  'Search Categories',
        'all_items' => 'All Categories',
        'parent_item' => 'Parent Category',
        'parent_item_colon' => 'Parent Category:',
        'edit_item' => 'Edit Category', 
        'update_item' => 'Update Category',
        'add_new_item' => 'Add New Category',
        'new_item_name' => 'New Category Name',
        'menu_name' => 'Category'
    );

    $args = array(
        'labels' => $labels,
        'hierarchical' => true,
        'rewrite' => false,
        'capabilities' => array('manage_terms') 
    );

    register_taxonomy('film_category', array('film'), $args);

both are fired on init action.

And now when the end User submit the form from the front end I execute that code: 

$post = array(
            'comment_status' => 'closed',
            'ping_status' => 'closed',
            'post_author' => 2,
            'post_content' => $_POST['synopsis'],
            'post_name' => sanitize_title($_POST['title']),
            'post_status' => 'private',
            'post_title' => $_POST['title'],
            'post_type' => 'film',
            'tax_input' => array(
                'film_category' => array(
                    $_POST['category']
                )
            )
        );

        $new_film_id = wp_insert_post($post);

        wp_set_object_terms($new_film_id, $_POST['category'], 'film_category', true);

In my front end form I have the “category” select field that contain the film categories. I have try to add on options values the terms ID, the terms Name and the terms Slug but it doesn’t work.

the new post is generated in my custom post type, but I can’t assign the film categories.

Any idea please ?

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3 comments

  1. Where is the code that catches an processes the $_POST data? Is it in a template file? Or is it in a function that is run on a hook? If it’s the latter, and if taxonomy_exists() is returning false as you suggest here (http://wordpress.stackexchange.com/questions/45798/wp-insert-post-and-custom-taxonomy#comment58402_45810), it’s possible that you’re checking before register_taxonomy has had a chance to run. Make sure that your form-processing function is hooked to something later than init:10.

  2. You shouldn’t need to use:

    wp_set_object_terms($new_film_id, $_POST['category'], 'film_category', true);

    and the tax_input array value. The latter former (Please see end remark) should be sufficient.

    If $_POST['category'] contains the term IDs, you will need to cast them as integers so they are not interpreted as slugs.

    Also if $_POST['category'] is an array then using array($_POST['category']) will be causing the problems. Try:

     //Cas as array
 $terms = isset($_POST['category']) ? (array) $_POST['category'] : array();

 //Cast array values as integers if $_POST['category'] contains IDs
 $terms = array_map('intval',$terms);

 $post = array(
      //other arguments

      'tax_input' => array(
            'film_category' => $terms,
        )
    );

    $new_film_id = wp_insert_post($post);

    Remark

    Rarst makes a good point in the comments which I think needs highlighting:

    wp_insert_post() will check for permission for tax_input and fail if user is not logged in. It’s bad choice for non-typical post inserts, explicit wp_set_object_terms() is better for use cases like migrations, front-end submissions, etc