Custom Taxonomy with tax_query

Question

So I've created a custom taxonomy type with a plugin (CMS Press) and now I'm trying to get all of the posts with the taxonomy terms in that taxonomy.

My get_posts looks like this:

$args = Array( 
    'numberposts' => 5, 
    'offset' => 0,
    'post_status' => 'publish',
    'content-type' => 'my-term'
);

get_posts($args);

I've also tried:

$args = Array( 
    'numberposts' => 5, 
    'offset' => 0,
    'post_status' => 'publish',
    'tax_query' => Array( Array ( 
        'taxonomy' => 'content-type' 
        'field' => 'slug' 
        'terms' => 'my-term' 
    ));

get_posts($args);

This works fine when I'm not using a custom taxonomy. if I change my request to:

$args = Array( 
    'numberposts' => 5, 
    'offset' => 0,
    'post_status' => 'publish',
    'tax_query' => Array( Array ( 
        'taxonomy' => 'post_tags' 
        'field' => 'slug' 
        'terms' => 'some-tag' 
    ));

get_posts($args);

it works.

I was wondering if there's something I'm leaving out that's preventing custom taxonomies from being queried. Any help would be appreciated.

Answer 1

From the WordPress codex for wp_query:

Display posts tagged with bob, under 'people' custom taxonomy:

$args = array(
    'post_type' => 'post',
    'people' => 'bob'
);
$query = new WP_Query( $args );

Display posts tagged with bob, under 'people' custom taxonomy, using tax_query:

$args = array(
    'post_type' => 'post',
    'tax_query' => array(
        array(
            'taxonomy' => 'people',
            'field' => 'slug',
            'terms' => 'bob'
        )
    )
);
$query = new WP_Query( $args );

See the Codex page for more examples.

Answer 2

The most probable cause of this issue is in the use of hypens (-) in your custom taxonomy name. Hyphens are extremely troublesome when used in custom taxonomy names, so by rule they should be avoided at all costs.

If you need to separate names in a custom taxonomy name, or even a custom post type name, you should and only use underscores (_). Also avoid the use of camelcase, numbers as first character and any type of special charachers