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I would like to do a filter that will hook to the main query and filter all the posts by some given taxonomy terms or custom fields. For now I have made the custom filters for the $query to only select the posts that have a custom value for certain taxonomy as follows:

foreach($data as $taxonomy => $terms):

and this solves it. But for example, I am having the following issue: I don't see how to provide instead of a taxonomy field, a custom field that has the value in a range; For example price is between 500-1000; where price is a custom field.

I have tried anything I could and searched a lot on the codex but I can't figure it out.

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up vote 1 down vote accepted

Have a look at the format of a meta_query in WP_Query.

$meta_query = array(
        'key' => 'price',
        'value' => array( 500, 1000 ),
        'type' => 'numeric',
        'compare' => 'BETWEEN'

$query->set( 'meta_query', $meta_query );
share|improve this answer
I see. I have checked this now and it seems that after I do th $query->set('meta_query',$meta_query); it seems that by doing a var_dump() on the main query, the 'meta_query' field is set to bool(false); Why' that? – roshkattu Feb 13 '13 at 17:57
sorry, typo - $meta_query => array( should have been $meta_query = array( on the first line. – Milo Feb 13 '13 at 18:05
Yes. I know, I have fixed that. There is no problem. Also, to enable meta_query you have to do this: $query->meta_query = true; so the query will actually use the filters provided! And THANK YOU for explaining me this.. it solved my problem! BIG UP – roshkattu Feb 13 '13 at 23:21

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