I’ve made the following changes to my copy of the plugin, in absence of a filter. All are in media-categories.php
Added to media_categories_meta_box() (line 140):
if (!get_the_category($post->ID))
{
$selected_cats = array(1);
} else {
foreach (get_the_category($post->ID) as $category) {
$selected_cats[] = $category->cat_ID;
}
}
and added ‘selected_cats’ => $selected_cats to line 176 as follows:
<?php wp_terms_checklist($post->ID, array('taxonomy' => $taxonomy, 'selected_cats' => $selected_cats, 'popular_cats' => $popular_ids, 'walker' => $custom_walker)) ?>
This succesfully checks the checkbox for the Uncategorized category, when no other category is selected. However, so far, this is only a visual effect and not saved to the database.
Instead of my previous code for line 140:
if (!get_the_category($post->ID))
{
wp_set_object_terms($post->ID, 1, 'category');
$selected_cats = array(1);
} else {
foreach (get_the_category($post->ID) as $category) {
$selected_cats[] = $category->cat_ID;
}
}
this saves the default category term 1 (Uncategorized) for Uncategorized posts. Do note that this does not support custom taxonomy.
