Get post according to current taxonomy

Question

Thanks for any help.

I am in a custom post (not an archive) with a taxonomy. And I'd like to display :

• some other custom posts
• with this current taxonomy

Doesn't seems so hard but for me it does... I didn't find the right way to use the term of my tax in the query...

Here is (one of) my try :

$terms = wp_get_post_terms( $post->ID, 'identite'); // to get my taxonomy

foreach ( $terms as $term ) {
echo "$term->slug"; // just for test - ok

   $args = array(
    'post_type' => 'example',
    'tax_query' => array(
        'relation' => 'AND',
        array(
            'taxonomy' => 'identite',
            'field'    => 'ID',
            'terms'    => $terms
             )
        ),
     );// end args

$query = new WP_Query( $args);

if ( $query->have_posts() ) {
    while ( $query->have_posts() ) {
         $query->the_post();

       // Little pray, but doesn't work

    }//end of while

}

I obtain this error message : Object of class WP_Term could not be converted to int in

Any idea to convert my object and make it readable ? Thanks a lot

(edit : I try with the function wp_list_pluck but without success)

Answer 1

Try this for WP_Query

$args = array(
'post_type' => 'example',
'tax_query' => array(
    'relation' => 'AND',
    array(
        'taxonomy' => 'identite',
        'field'    => 'ID',
        'terms'    => $term->term_id
         )
    ),
 );// end args

OR

$args = array(
'post_type' => 'example',
'tax_query' => array(
    'relation' => 'AND',
    array(
        'taxonomy' => 'identite',
        'field'    => 'ID',
        'terms'    => array($term->term_id)
         )
    ),
 );// end args

$term is an object and tax_query expects an array of id's.

See: https://codex.wordpress.org/Class_Reference/WP_Query#Taxonomy_Parameters

Answer 2

You get this error message because of the way you are setting up the $args array. In the tax_query, you'll want to pass an array of all the terms ids for the current post. Also, the field value was incorrect (as seen in the Codex here: WP_Query#Taxonomy_Parameters).

The final code should look something like:

<?php 

$terms = wp_get_post_terms( $post->ID, 'identite'); 
$terms_ids = [];

foreach ( $terms as $term ) {
    $terms_ids[] = $term->term_id;
}

$args = array(
    'post_type' => 'example',
    'tax_query' => array(
        'relation' => 'AND',
        array(
            'taxonomy' => 'identite',
            'field'    => 'term_id',
            'terms'    => $terms_ids
        )
    ),
);

$query = new WP_Query($args);

if ( $query->have_posts() ) {
    while ( $query->have_posts() ) {
        $query->the_post();

        // All the magic here
    }
}