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POWordpress wp_query filter using posts_groupby - how to SUM values in joined table?
 

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  1. POWordpress wp_query filter using posts_groupby - how to SUM values in joined table?
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    <p>Can somebody please help me with a crazy wordpress problem? I'm using wordpress's add_filter to join a second table for my wp_query and I'm trying to get the query to group_by a pageviews column (from a plugin I installed) and SUM them for my output. I'm managing to get the results grouped but the result set only shows one of the values. I would like to know 2 things.</p> <ol> <li>Is my join ok for joining the posts table to the wp_popularpostsdata table where the wp_popularpostsdata table will have more than one entry per post->ID?</li> <li>How do I use the SUM function as I can't see it anywhere in the Codex?</li> </ol> <p>I'm having to use wp_query, as opposed to query_posts, as that is what is used for the rest of the output in my client's templates. I tried using wppp.postid as my groupby but it returned no results. Here's my code, hopefully it makes a bit more sense.</p> <p>Functions in my site plugin:-</p> <pre><code> function add_filter_7dayspopular(){ add_filter('posts_where', 'edit_posts_where'); add_filter('posts_join','edit_posts_join'); add_filter('posts_groupby','edit_posts_groupby'); add_filter('posts_orderby','edit_posts_orderby'); function edit_posts_join($join_statement) { global $wpdb; remove_filter( current_filter(), __FUNCTION__ ); $join_statement .= "LEFT JOIN wp_popularpostsdata wppp ON $wpdb-&gt;posts.ID = wppp.postid"; return $join_statement; } function edit_posts_where($where_statement) { global $wpdb; remove_filter( current_filter(), __FUNCTION__ ); $where_statement .= " AND wppp.last_viewed &gt; '" . date('Y-m-d', strtotime('-7 days')) . "'"; return $where_statement; } function edit_posts_groupby($groupby_statement) { global $wpdb; remove_filter( current_filter(), __FUNCTION__ ); $groupby_statement = "{$wpdb-&gt;posts}.ID"; return $groupby_statement; } function edit_posts_orderby($orderby_statement){ global $wpdb; remove_filter( current_filter(), __FUNCTION__ ); $orderby_statement = "wppp.pageviews DESC"; return $orderby_statement; } } </code></pre> <p>Here's my new wp_query code:-</p> <pre><code> add_filter_7dayspopular(); $args = array( 'post_type' =&gt; array( 'post', 'portfolio' ), 'post__not_in' =&gt; $itemArray, 'posts_per_page' =&gt; $load_more, 'post_status'=&gt;'publish', 'orderby' =&gt; 'pageviews', 'order' =&gt; 'DESC', 'paged' =&gt; $paged ); </code></pre> <p>Thanks guys.</p> <p>Mark</p> <p>Loushou answered the question fully. After running the code the field $post_.total_views is available to use inside my loop. Here's their code with a tiny change by myself:-</p> <pre><code> // change your orderby function to order by the sum function edit_posts_orderby($orderby_statement){ global $wpdb; remove_filter( current_filter(), __FUNCTION__ ); // add sum() around the field name $orderby_statement = 'sum(wppp.pageviews) DESC'; return $orderby_statement; } // add a posts_fields function function edit_posts_fields($fields_statement) { global $wpdb; remove_filter( current_filter(), __FUNCTION__ ); $fields_statement .= ', sum(wppp.pageviews) as total_views'; return $fields_statement; } </code></pre>
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