Question

$args = array(
    'post_type' => array('project','department'),
    'meta_query' => array(
        array(
            'key' => 'jurisdiction',
            'value' => $where,
            'compare' => '='
        ),
        array(
            'key' => 'title',
            'value' => $cat,
            'compare' => '='
        ),
        array(
            'key' => 'status',
            'value' => $type,
            'compare' => '='
        )
    )
);

$loop = new WP_Query($args);

while ($loop->have_posts()) : $loop->the_post();
    global $post;
    the_title();
endwhile;

会产生以下错误

警告：trim（）要求参数1为字符串，在第584行的/var/www/.../wp-includes/class-wp-meta-query.php中给出数组

Answer 1

首先：在meta_query中，不要接受数组变量。只检查这个（$ where，$ cat和$ type）变量给你正确的值？

第二：可能是你忘了在meta_query中写关系属性。

 $args = array(
    'post_type' => array('project','department'),
    'meta_query' => array(
        'relation' => 'OR', // Optional, defaults to "AND"
        array(
            'key' => 'jurisdiction',
            'value' => $where,
            'compare' => '='
        ),
        array(
            'key' => 'title',
            'value' => $cat,
            'compare' => '='
        ),
        array(
            'key' => 'status',
            'value' => $type,
            'compare' => '='
        )
    )
);

我希望它对你有帮助

多元meta_key和meta_value

1 个答案: