我只想展示没有“分类”产品品牌“品牌”的帖子.
我当前的查询不适用于过滤器：
SELECT disTINCT * FROM $wpdb->posts AS p
LEFT JOIN $wpdb->postMeta AS Meta ON p.ID = Meta.post_id
LEFT JOIN $wpdb->term_relationships AS rel ON rel.object_id = p.ID
LEFT JOIN $wpdb->term_taxonomy AS tax ON tax.term_taxonomy_id = rel.term_taxonomy_id
LEFT JOIN $wpdb->terms AS term ON tax.term_id = term.term_id
WHERE 1=1
AND p.post_type = 'product'
AND p.post_status = 'publish'
AND p.post_title LIKE '%$trimmed%' OR (Meta.Meta_key = 'product_model' AND Meta.Meta_value LIKE '%$trimmed%')
AND (tax.taxonomy = 'product-brand' AND term.slug NOT IN ('$protected'))
在上述查询中,分类或条件条件似乎都不起作用.
任何帮助是赞赏！
笔记：
看起来你没有使用$wpdb-> prepare(),所以你冒着sql注入的风险.
我也认为你在相关OR部分周围缺少括号,所以你不会最终显示草稿.
替代方案：
而不是编写一个硬编码的SQL查询,我们应该能够使用WP_Query类,并通过钩子/过滤器进行一些修改.
这是一个例子(PHP 5.4)：
$args = [
'_Meta_or_like_title' => $trimmed,// Our new custom argument!
'post_type' => 'product','post_status' => 'publish','Meta_query' => [
[
'key' => 'product_model','value' => $trimmed,// Your Meta value
'compare' => 'LIKE'
]
],'tax_query' => [
[
'taxonomy' => 'product-brand','field' => 'slug','terms' => $protected,// Your terms array
'operator' => 'NOT IN'
]
]
];
其中自定义_Meta_or_like_title参数由稍微修改的插件支持,我为另一个question here写.
插入：
<?PHP
/**
* Plugin Name: Meta OR LIKE Title query in WP_Query
* Description: Activated through the '_Meta_or_like_title' argument of WP_Query
* Plugin URI: https://stackoverflow.com/a/31241416/2078474
* Plugin Author: Birgir Erlendsson (birgire)
* Version: 0.0.1
*/
add_action( 'pre_get_posts',function( $q )
{
if( $title = $q->get( '_Meta_or_like_title' ) )
{
add_filter( 'get_Meta_sql',function( $sql ) use ( $title )
{
global $wpdb;
// Only run once:
static $nr = 0;
if( 0 != $nr++ ) return $sql;
// Modify WHERE part:
$sql['where'] = sprintf(
" AND ( %s OR %s ) ",$wpdb->prepare(
"{$wpdb->posts}.post_title LIKE '%%%s%%'",$wpdb->esc_like( $title )
),mb_substr( $sql['where'],5,mb_strlen( $sql['where'] ) )
);
return $sql;
});
}
},PHP_INT_MAX );