Querying Term Posts in Loop

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I’m trying to show my CPT Category along with any posts associated with it below the title. I have the first loop fine: 

<?php $cats = get_categories(array('taxonomy' => 'custtax', 'orderby' => 'term_group')); 
    if(!empty($cats)) : 
        foreach($cats as $cat) : ?>
            <a href="<?php echo get_category_link($cat->term_id); ?>"><?php echo $cat->name; ?></a>
                <br />
            <?php wp_reset_query(); ?>
            <?php $cat_posts = new WP_Query(array('post_type' => 'custcpt', 'taxonomy' => 'custtax', 'terms' => $cat->slug, 'order' => 'ASC'));
            foreach($cat_posts as $cat_post) : ?>

                    <center><?php get_the_post_thumbnail($cat_post->ID, 'thumbnail'); ?></center>
                        <br />
                    <a href="<?php get_permalink($cat_post->ID); ?>"><?php get_the_title($cat_post->ID); ?></a>
                        <br />
                        <br />

            <?php endforeach; ?>
        <?php endforeach; ?>
    <?php endif; ?>

But my second loop queries all my posts instead of just the ones from that category. I’ve tried get_posts() and instead of pulling all posts it didn’t pull any. I’m not sure if 'category' in the codex is expecting a string, slug, or ID, but I’ve tried all 3. Anyway how do I edit my query to only pull posts from that certain category?

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2 comments

  1. To expand on the answer from @s_ha_dum – you need to modify a few things about your query.

    First, use his suggested tax query:

    $args = array(
    'post_type' => 'custcpt', 
    'tax_query' => array(
        array(
            'taxonomy' => 'custtax', 
            'field' => 'id',
            'terms' => $cat->term_id,
        )
    ), 
    'order' => 'ASC'
);

    Then, modify your code as follows:

    $cat_posts = new WP_Query($args);
while ($cat_posts->have_posts()) :
    $cat_posts->the_post(); 
    // Below, when referencing the post variables, must be as $cat_post->post->ID, etc. ?>
    <center><?php get_the_post_thumbnail($cat_post->post->ID, 'thumbnail'); ?></center>
    <br />
    <?php // Below, don't need to pass the post ID into these functions.  ?>
    <a href="<?php get_permalink(); ?>"><?php get_the_title(); ?></a>
                    <br />
                    <br />

        <?php endwhile; ?>
    <?php endif; ?>

    Note a few things:

    1. You must use while ($cat_posts->have_posts) to iterate over the
      posts.
    2. Call cat_posts->the_post() to prepare the data to be displayed in the functions such as get_the_title()
    3. When referencing post variables, such as ID, you must do so as $cat_posts->post->ID
    4. When calling functions such as get_the_title(), you do not need to pass the ID in.

  2. You need a tax_query and what you have is not that.

    $cat_posts = new WP_Query(
  array(
    'post_type' => 'custcpt', 
    'tax_query' => array(
      array(
        'taxonomy' => 'custtax', 
        'field' => 'id',
        'terms' => $cat->term_id,
      )
    ), 
    'order' => 'ASC'
  )
);

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