Reply To: Query CPT from relationship field in regular post

• gummi

• October 28, 2017 at 2:15 pm

1) I believe the compare word you are looking for is LIKE.
2) meta_query takes nested array, so your code should be like

$query = get_posts(array(
    'post_type' => 'post',
    'meta_query' => array(
        array(
            'key' => 'issue',
            'value' => '"' . get_the_ID() . '"',
            'compare' => 'LIKE'
        )
    )
));

https://codex.wordpress.org/Class_Reference/WP_Query#Custom_Field_Parameters

Cheers