meta_query 'compare' => 'IN' funktioniert nicht

Esgibt keineeinfache Möglichkeit,serialisierte Wertein einer Metaabfrage zu suchen.Wenn die Wertelistenicht verrücktist,können Siemöglicherweisemehrere Metaabfrageneinrichten:

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

Oder wenn Sie super schick werdenmöchten,können Siees dynamischeinrichten:

 $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',
    );
}

Ich weiß,esist lange her,abernurfür den Fall,dassjemand dasgleiche Problem hat.Nun,ich habe stundenlang anmeinen Haarengezogen,bevorich das Problemgefunden habe: 'meta_query'mit dem Vergleichsoperator 'IN' scheint das übliche Arraynicht zu akzeptieren.Stattdessenmüssen Sie zuerst ',' hinzufügen.

In Ihrem Fall sollte also soetwasfunktionieren:

 $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;