Custom Taxonomy and tax_query Issue?

Question

I am working on Plugin development and my plugin name is plugindev.I have a custom post type called team.I have a custom taxonomy Team_Category which is being registered by this code

/***************************taxonomy****************************/
add_action( 'init', 'create_team_taxonomies', 0 );
function create_team_taxonomies() {
    // Add new taxonomy, make it hierarchical (like categories)
    $labels = array(
        'name'              => _x( 'Team_Categories', 'taxonomy general name' ),
        'singular_name'     => _x( 'Team_Category', 'taxonomy singular name' ),
        'search_items'      => __( 'Search Team_Categories' ),
        'all_items'         => __( 'All Team_Categories' ),
        'parent_item'       => __( 'Parent Team_Category' ),
        'parent_item_colon' => __( 'Parent Team_Category:' ),
        'edit_item'         => __( 'Edit Team_Category' ),
        'update_item'       => __( 'Update Team_Category' ),
        'add_new_item'      => __( 'Add New Team_Category' ),
        'new_item_name'     => __( 'New Team_Category Name' ),
        'menu_name'         => __( 'Team_Category' ),
    );

    $args = array(
        'hierarchical'      => true,
        'labels'            => $labels,
        'show_ui'           => true,
        'show_admin_column' => false,
        'query_var'         => true,
        'rewrite'           => array( 'slug' => 'Team_Category' ),
    );

    register_taxonomy( 'Team_Category', array( 'team' ), $args );
}
/****************************taxanomy end***********************************/

But when I use a tax_query in my WP_Query, I do not get any posts. here is my code

<?php
$taxonomy_name = 'Team_Category';
$get_categories = get_terms($taxonomy_name);
$total_categories = count($get_categories);
// Loop through the obituaries:
for ($i = 0; $i < $total_categories; $i++) {
    ?>
    <div class="row">
        <div class="col-md-4">
            <?php echo $category_name = $get_categories[$i]->name; ?>
        </div>
        <?php
        $args = array(
            'post_type' => 'team',
            'tax_query' => array(
                array(
                    'taxonomy' => 'Team_Category', 
                    'field' => 'slug', 'terms' => $category_name,)
                )
         );

        $query = new WP_Query($args);

        if ($query->have_posts()) {
        while ($query->have_posts()) {
            $query->the_post();
            the_title();
        }
        }
        wp_reset_query(); ?>

    </div>

<?php }

It works perfectly without tax_query.I did lot of google but found no suitable result.Any solution to solve this problem .Any help would be highly appreciated

Answer 1

I think that the problem is right in your code, but it's really easy to overlook. Let's take a closer look at this part:

    <div class="col-md-4">
        <?php echo $category_name = $get_categories[$i]->name; ?>
    </div>
    <?php
    $args = array(
        'post_type' => 'team',
        'tax_query' => array(
            array(
                'taxonomy' => 'Team_Category', 
                'field' => 'slug', 'terms' => $category_name
            )
        )
    );

What exactly is going on in here? You get name of term and store it as $category_name ($category_name = $get_categories[$i]->name;).

Later, you use this value as a slug ('field' => 'slug', 'terms' => $category_name).

Slug and name are different things, so there is a really big probability that your Tax_Query won't find anything (if name contains capital letter, space or any special character, slug will be different from name).

So it should work fine, if you'll change it so it looks like this:

    <div class="col-md-4">
        <?php echo $get_categories[$i]->name; ?>
    </div>
    <?php
    $args = array(
        'post_type' => 'team',
        'tax_query' => array(
            array(
                'taxonomy' => 'Team_Category', 
                'field' => 'slug',
                'terms' => $get_categories[$i]->slug;
            )
        )
    );

    $query = new WP_Query($args);