Limit taxonomy results to a single cpt

Question

I have two cpt's, events and reports, they both share the taxonomy locations, I have my taxonomy-locations.php, but that is showing reports & events for location, I just want to show reports for location. Can someone help me out with how this query should go?

Thanks

Answer 1

Before the loop in your taxonomy-locations.php file,

global $wp_query;
$args = array_merge( $wp_query->query, array( 'post_type' => 'report' ) );
query_posts( $args );

You could, alternatively, modify the query using an appropriate hook (this would be the most effecient method) - but since it is run for most queries, you would need to check it's actually a query for which you want to set post type to 'report'. For example:

function my_restrict_to_report() {
    //And any other checks
    if (!is_admin() && is_tax('location')) {
        set_query_var('post_type','report');
    }
}
add_action( 'pre_get_posts', 'my_restrict_to_report' );

Not tested

Answer 2

i believe you can also do this via the pre_get_posts action. the $query variable is the entire query object and it is passed 'by reference' meaning that anything you do to it inside the function will modify the original query

add_action('pre_get_posts', 'kia_limit_tax' );

function kia_limit_tax( $query ) {
    //check that we're in the locations taxonomy before modifying the query
    if(is_tax('locations')){
        set_query_var('post_type','event');
            //which is the more elegant way to write this:
            //$query->set('post_type','event');
    }
}

is_taxonomy() is deprecated and is_tax() should be used http://codex.wordpress.org/Function_Reference/is_tax