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Editorial Team
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Asked: 2026-06-03T21:54:23+00:00

I need some help with a query that should return posts based on their

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I need some help with a query that should return posts based on their wp-postratings score (http://wordpress.org/extend/plugins/wp-postratings/).

The user chooses a minimum rating (0 to 5 stars) and a maximum rating (0 to 5 stars) and the query should return the posts that match. I have it working where the user input for both values is above 0 but I can’t seem to get my head around the 0 value. Since 0 represents unrated posts – and hence onces that have no ratings meta data – I need to select not only the posts where the rating is no more than the specified max value, but also every post that has no rating meta data.

How can I do this?? Any help will be very much appreciated!

Here’s my current query:

SELECT DISTINCT p.*, (t1.meta_value+0.00) AS ratings_average, (t2.meta_value+0.00) AS ratings_users, (t3.meta_value+0.00) AS ratings_score 
FROM wp_posts p 
INNER JOIN wp_term_relationships tr ON (p.ID = tr.object_id) 
INNER JOIN wp_term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id) 
INNER JOIN wp_terms t ON  t.term_id = tt.term_id
LEFT JOIN wp_postmeta AS t1 ON t1.post_id = p.ID 
LEFT JOIN wp_postmeta AS t2 ON t1.post_id = t2.post_id 
LEFT JOIN wp_postmeta AS t3 ON t3.post_id = p.ID 
WHERE t1.meta_key = 'ratings_average' 
AND t2.meta_key = 'ratings_users' 
AND t3.meta_key = 'ratings_score' 
AND p.post_date < NOW() 
AND p.post_status = 'publish' 
AND (tt.taxonomy = 'post_tag' AND tt.term_id = t.term_id AND t.slug = 'liverpool')
AND ( (t1.meta_value+0.00) IS NULL OR (t1.meta_value+0.00) <= $max_stars )
ORDER BY p.post_date DESC 
LIMIT 20
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1 Answer

  1. Editorial Team

    Okay, this query seems to work for me. Its a bit ugly though and not too quick so if anyone has a better one feel free to improve upon it!

    It selects all of the rated posts that are below the $max_stars value, then combines the table with a separate select which gets all of the non-rated posts:

    (SELECT DISTINCT p.*, (t1.meta_value+0.00) AS ratings_average, (t2.meta_value+0.00) AS ratings_users, (t3.meta_value+0.00) AS ratings_score 
FROM wp_posts p
INNER JOIN wp_term_relationships tr ON (p.ID = tr.object_id) 
INNER JOIN wp_term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id) 
INNER JOIN wp_terms t ON  t.term_id = tt.term_id
LEFT JOIN wp_postmeta AS t1 ON t1.post_id = p.ID 
LEFT JOIN wp_postmeta AS t2 ON t2.post_id = p.ID 
LEFT JOIN wp_postmeta AS t3 ON t3.post_id = p.ID 
WHERE t1.meta_key = 'ratings_average' 
AND t2.meta_key = 'ratings_users' 
AND t3.meta_key = 'ratings_score' 
AND p.post_date < NOW() 
AND p.post_status = 'publish' 
AND (tt.taxonomy = 'post_tag' AND tt.term_id = t.term_id AND t.slug = 'liverpool')
AND (t1.meta_value+0.00) <= $max_stars )

UNION

(SELECT DISTINCT p.*, NULL AS ratings_average, NULL AS ratings_users, NULL AS ratings_score 
FROM wp_posts p 
INNER JOIN wp_term_relationships tr ON (p.ID = tr.object_id) 
INNER JOIN wp_term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id) 
INNER JOIN wp_terms t ON  t.term_id = tt.term_id
LEFT JOIN wp_postmeta AS t1 ON (t1.post_id = p.ID AND t1.meta_key = 'ratings_score')
WHERE t1.post_id is null
AND p.post_date < NOW() 
AND p.post_status = 'publish' 
AND (tt.taxonomy = 'post_tag' AND tt.term_id = t.term_id AND t.slug = 'liverpool') )

ORDER BY post_date DESC
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