Learning to Display Posts by Taxonomy?

Question

Here is the situation, I have a custom tax called Skill. I want to be able to display posts only with skill set as Japanese from English.

I am trying to learn how to use pre_get_posts hook to modify my get_posts query. Here is my example, however I land with the error:

Notice: Undefined variable: postdata

This is what I have tried based on research:

add_filter( 'pre_get_posts', 'wpshout_fundraiser_recent_posts' );
function wpshout_fundraiser_recent_posts( $query ) {

    // Fetch only posts tagged with "Japanese from English"
    $taxquery = array(
        array(
            'taxonomy' => 'Japanese from English',
            'field' => 'skill',
            'terms' => array( 'skill' ),
        )
    );
    $query->set( 'tax_query', $taxquery );

I am sure something is wrong with the above query, which I don't fully understand. Any help and please explain what each field of the array is for if possible.

Answer 1

Try this below code this should work,

add_filter( 'pre_get_posts', 'wpshout_fundraiser_recent_posts' );
function wpshout_fundraiser_recent_posts( $query ) {

$posts_array = get_posts(
    array(
        'posts_per_page' => -1,
        'post_type' => 'Your Post Type Name',
        'tax_query' => array(
            array(
                'taxonomy' => 'Japanese from English',
                'field' => 'skill',
                'terms' => array( 'skill' ),
            )
        )
    )
);
return $posts_array;

}