meta_query 'compare' => 'IN' non funziona

Nonesiste unmodo sempliceper cercare valori serializzatiin unameta query.Se l'elenco dei valorinon ètroppo lungo,potenzialmentepotrestiimpostarepiùmeta query:

 'meta_query'    => array(
    'relation' => 'OR',
    array(
        'key'       => 'system_power_supply',
        'value'     => 'single',
        'compare'   => 'LIKE',
    ),
    array(
        'key'       => 'system_power_supply',
        'value'     => 'redundant',
        'compare'   => 'LIKE',
    )
)
 

Oppure,se vuoi diventare superfantasioso,puoiimpostarlo dinamicamente:

 $values_to_search = array('single', 'redundant');
$meta_query = array('relation' => 'OR');
foreach ($values_to_search as $value) {
    $meta_query[] = array(
        'key'       => 'system_power_supply',
        'value'     => $value,
        'compare'   => 'LIKE',
    );
}
 

There's no easy way to search serialized values in a meta query. If the list of values isn't crazy long, potentially you could set up multiple meta queries:

'meta_query'    => array(
    'relation' => 'OR',
    array(
        'key'       => 'system_power_supply',
        'value'     => 'single',
        'compare'   => 'LIKE',
    ),
    array(
        'key'       => 'system_power_supply',
        'value'     => 'redundant',
        'compare'   => 'LIKE',
    )
)

Or if you wanted to get super fancy, you could set it up dynamically:

$values_to_search = array('single', 'redundant');
$meta_query = array('relation' => 'OR');
foreach ($values_to_search as $value) {
    $meta_query[] = array(
        'key'       => 'system_power_supply',
        'value'     => $value,
        'compare'   => 'LIKE',
    );
}

So che èpassatomoltotempo,manel caso qualcuno avesse lo stessoproblema.Beh,mi sonotiratoi capelliper oreprima ditrovareilproblema: "meta_query" con l'operatore di confronto "IN"non sembra accettareil solito array.invece,deviprima unirti con ",".

Quindi,neltuo caso,qualcosa delgenere dovrebbefunzionare:

 $args   =   array(
'posts_per_page'   => -1,
'post_type'     => 'post',
'meta_query'    => array(
    array(
        'key'       => 'system_power_supply',
        'value'     => join(', ', array('single', 'redundant')),
        'compare'   => 'IN',
    )
)
);
$query = new WP_Query($args);
echo $query->found_posts;
 

I know it's been a long time, but just in case someone has the same issue. Well i've been pulling my hair for hours before i found the issue: 'meta_query' with 'IN' comparison operator doesn't seem to accept the usual array. instead, you need to join it first with ', '.

So, in your case, something like this should work :

$args   =   array(
'posts_per_page'   => -1,
'post_type'     => 'post',
'meta_query'    => array(
    array(
        'key'       => 'system_power_supply',
        'value'     => join(', ', array('single', 'redundant')),
        'compare'   => 'IN',
    )
)
);
$query = new WP_Query($args);
echo $query->found_posts;