Complex query with WP_Query - sql

Question

I am still learning wordpress and trying to perform a query of posts with WP_Query, meta_query to be precise, the thing is after trying different possible ways and finding out that I can't nest arrays with relations I dont know if the next possible way is to make a sql query directly.
To better explain what I would like to do, the next array hopefully will help:
'meta_query' => array(
'relation' => 'AND',
array(
'key' => 'Meta_geo',
'value' => '46',
'compare' => '=',
),
array(
'key' => 'Meta_dest',
'value' => 'si',
'compare' => '=',
),
array(
'relation' => 'OR',
array(
array(
'key' => 'Meta_1',
'value' => '10',
'compare' => '<=',
),
array(
'key' => 'Meta_1',
'value' => '30',
'compare' => '>=',
)
),
array(
'relation' => 'OR',
array(
'key' => 'Meta_1',
'value' => '',
'compare' => '=',
),
array(
'key' => 'Meta_1',
'value' => '',
'compare' => '=',
)
)
)
),
many Thanks for the time, if there are an expertet who can give me a hint I will be grateful.
Sorry for my english.

Answer 1

Based on what you have above the below is the closest your are going to get...
'meta_query' => array(
'relation' => 'OR',
array(
'key' => 'Meta_geo',
'value' => '46',
'compare' => '=',
),
array(
'key' => 'Meta_dest',
'value' => 'si',
'compare' => '=',
),
array(
'key' => 'Meta_1',
'value' => array('10','11','12' etc),
'compare' => 'IN',
),
)
This will leave you a little sorting out to do however. This can be done with a loop and as you normally display the results of a query using the loop you can use that.
e.g.
while ( $my_query->have_posts() ) : $my_query->the_post();
$metavalue = get_post_meta($post->ID, 'meta_geo', true);
$metavalue = get_post_meta($post->ID, 'meta_dist', true);// if there are a lot of conds, use get_post_meta($post->ID) to return object of value arrays
if($metavalue == 46 && ): //proceed
//html here!
endif;
endwhile;