Php 如何避免WordPress get_posts（）中自定义字段（元值）查询的数量和条件限制？
我正在为一个基于WordPress的网站构建搜索工具，WordPress中的Php 如何避免WordPress get_posts（）中自定义字段（元值）查询的数量和条件限制？,php,mysql,wordpress,advanced-custom-fields,Php,Mysql,Wordpress,Advanced Custom Fields,我正在为一个基于WordPress的网站构建搜索工具，WordPress中的get_posts（）函数似乎将我的元值查询限制为最多6个和子句，但我需要这个工具来处理远不止6个和子句 下面是一个返回空数组的查询示例。下面的代码1是返回空数组的数组的print\u r（）。下面的代码2与代码1相同，但我删除了一条和语句，它返回一个结果。注：我尝试了多种组合，这只是一个例子 为免生疑问，我还提供了一个数据库中的帖子示例（如下面的代码3），该帖子应与代码1匹配，因此我认为我们可以排除查询不匹配的事实。这
get_posts（）和print\u r（）。下面的代码2与代码1相同，但我删除了一条和语句，它返回一个结果。注：我尝试了多种组合，这只是一个例子
为免生疑问，我还提供了一个数据库中的帖子示例（如下面的代码3），该帖子应与代码1匹配，因此我认为我们可以排除查询不匹配的事实。这让我相信get_posts（）
最多只能处理元查询中的6个和
子句。或者我错过了什么？我可以强制get_posts（）
处理6个以上的和子句吗
代码1：
Array
(
[post_type] => page
[posts_per_page] => 10000
[category_name] => active-cards
[meta_query] => Array
(
[relation] => AND
[0] => Array
(
[key] => card_purchase_rate
[value] => Array
(
[0] => 0
[1] => 46
)
[compare] => BETWEEN
[type] => NUMERIC
)
[1] => Array
(
[key] => card_balance_transfer_rate
[value] => Array
(
[0] => 0
[1] => 14
)
[compare] => BETWEEN
[type] => NUMERIC
)
[2] => Array
(
[relation] => AND
[0] => Array
(
[key] => is_rewards_card
[value] => yes
[compare] => LIKE
)
[1] => Array
(
[key] => is_air_points_card
[value] => yes
[compare] => LIKE
)
[2] => Array
(
[key] => is_frequent_flyer_card
[value] => yes
[compare] => LIKE
)
)
[3] => Array
(
[key] => card_brand
[value] => Array
(
[0] => amex
[1] => mastercard
[2] => visa
)
[compare] => IN
[type] => CHAR
)
[4] => Array
(
[key] => card_provider
[value] => Array
(
[0] => anz
[1] => asb
[2] => bnz
[3] => westpac
[4] => kiwibank
[5] => tsb
[6] => warehouse_money
)
[compare] => IN
[type] => CHAR
)
)
)
代码2：
Array
(
[post_type] => page
[posts_per_page] => 10000
[category_name] => active-cards
[meta_query] => Array
(
[relation] => AND
[0] => Array
(
[key] => card_purchase_rate
[value] => Array
(
[0] => 0
[1] => 46
)
[compare] => BETWEEN
[type] => NUMERIC
)
[1] => Array
(
[key] => card_balance_transfer_rate
[value] => Array
(
[0] => 0
[1] => 14
)
[compare] => BETWEEN
[type] => NUMERIC
)
[2] => Array
(
[relation] => AND
[0] => Array
(
[key] => is_rewards_card
[value] => yes
[compare] => LIKE
)
[1] => Array
(
[key] => is_air_points_card
[value] => yes
[compare] => LIKE
)
[2] => Array
(
[key] => is_frequent_flyer_card
[value] => yes
[compare] => LIKE
)
)
[3] => Array
(
[key] => card_brand
[value] => Array
(
[0] => amex
[1] => mastercard
[2] => visa
)
[compare] => IN
[type] => CHAR
)
)
)
代码3（这是代码2返回的post示例。代码1也应与此项匹配，但它不返回任何内容
Array
(
[0] => WP_Post Object
(
[ID] => 3742
[post_author] => 1
[post_date] => 2017-01-17 20:01:36
[post_date_gmt] => 2017-01-17 09:01:36
[post_title] => Westpac Airpoints Business MasterCard Credit Card
[post_excerpt] =>
[post_status] => publish
[comment_status] => closed
[ping_status] => closed
[post_password] =>
[post_name] => westpac-airpoints-business-mastercard-credit-card
[to_ping] =>
[pinged] =>
[post_modified] => 2017-04-11 22:08:20
[post_modified_gmt] => 2017-04-11 11:08:20
[post_content_filtered] =>
[post_parent] => 0
[guid] => http://www.creditcardscompare.co.nz/?page_id=3742
[menu_order] => 0
[post_type] => page
[post_mime_type] =>
[comment_count] => 0
[filter] => raw
[meta] => Array
(
[card_annual_fee] => Array
(
[0] => 145
)
[card_purchase_rate] => Array
(
[0] => 20.95
)
[card_balance_transfer_rate] => Array
(
[0] => 1.99
)
[card_cash_rate] => Array
(
[0] => 22.95
)
[card_interest_free_days] => Array
(
[0] => 44
)
[card_provider] => Array
(
[0] => Westpac
)
[card_brand] => Array
(
[0] => Mastercard
)
[is_rewards_card] => Array
(
[0] => a:1:{i:0;s:3:"yes";}
)
[is_low_interest_card] => Array
(
[0] =>
)
[is_no_annual_fee_card] => Array
(
[0] =>
)
[is_balance_transfer_card] => Array
(
[0] =>
)
[is_student_card] => Array
(
[0] =>
)
[is_prestige_card] => Array
(
[0] =>
)
[is_air_new_zealand_card] => Array
(
[0] =>
)
[is_air_points_card] => Array
(
[0] => a:1:{i:0;s:3:"yes";}
)
[is_frequent_flyer_card] => Array
(
[0] => a:1:{i:0;s:3:"yes";}
)
[is_airpoint_lounge_access_card] => Array
(
[0] =>
)
[is_best_card] => Array
(
[0] =>
)
[is_black_card] => Array
(
[0] =>
)
[is_business_card] => Array
(
[0] => a:1:{i:0;s:3:"yes";}
)
[is_cash_advance_card] => Array
(
[0] =>
)
[is_cash_back_card] => Array
(
[0] =>
)
[is_cheap_card] => Array
(
[0] =>
)
[is_debit_card] => Array
(
[0] =>
)
[is_flybuys_card] => Array
(
[0] =>
)
[is_gold_card] => Array
(
[0] =>
)
[is_high_income_card] => Array
(
[0] =>
)
[is_home_loan_card] => Array
(
[0] =>
)
[is_instant_approval_card] => Array
(
[0] =>
)
[is_long_term_balance_transfer_card] => Array
(
[0] =>
)
[is_low_annual_fee_card] => Array
(
[0] =>
)
[is_low_income_card] => Array
(
[0] =>
)
[is_no_foreign_transaction_fee_card] => Array
(
[0] =>
)
[is_platinum_card?] => Array
(
[0] =>
)
[is_purchase_protection_card] => Array
(
[0] =>
)
[is_qantas_card] => Array
(
[0] =>
)
[is_signup_bonus_card] => Array
(
[0] =>
)
[is_travel_insurance_card] => Array
(
[0] =>
)
[is_zero_balance_transfer_card] => Array
(
[0] =>
)
[is_zero_interest_card] => Array
(
[0] =>
)
[card_star_rating] => Array
(
[0] => 4
)
)
[post_url] => http://www.creditcardscompare.co.nz/westpac-airpoints-business-mastercard-credit-card/
)
根据这里的请求，是WP_查询SQL
SELECT SQL_CALC_FOUND_ROWS wp_posts.* FROM wp_posts LEFT JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) INNER JOIN wp_postmeta ON ( wp_posts.ID = wp_postmeta.post_id ) INNER JOIN wp_postmeta AS mt1 ON ( wp_posts.ID = mt1.post_id ) INNER JOIN wp_postmeta AS mt2 ON ( wp_posts.ID = mt2.post_id ) INNER JOIN wp_postmeta AS mt3 ON ( wp_posts.ID = mt3.post_id ) INNER JOIN wp_postmeta AS mt4 ON ( wp_posts.ID = mt4.post_id ) INNER JOIN wp_postmeta AS mt5 ON ( wp_posts.ID = mt5.post_id ) INNER JOIN wp_postmeta AS mt6 ON ( wp_posts.ID = mt6.post_id ) WHERE 1=1 AND (
wp_term_relationships.term_taxonomy_id IN (78)
) AND (
( wp_postmeta.meta_key = 'card_purchase_rate' AND CAST(wp_postmeta.meta_value AS SIGNED) BETWEEN '0' AND '30' )
AND
( mt1.meta_key = 'card_balance_transfer_rate' AND CAST(mt1.meta_value AS SIGNED) BETWEEN '0' AND '13' )
AND
(
( mt2.meta_key = 'is_rewards_card' AND mt2.meta_value LIKE '%yes%' )
AND
( mt3.meta_key = 'is_air_points_card' AND mt3.meta_value LIKE '%yes%' )
AND
( mt4.meta_key = 'is_frequent_flyer_card' AND mt4.meta_value LIKE '%yes%' )
)
AND
( mt5.meta_key = 'card_brand' AND mt5.meta_value IN ('amex','mastercard','visa') )
AND
( mt6.meta_key = 'card_provider' AND mt6.meta_value IN ('anz','asb','bnz','westpac','kiwibank','tsb','warehouse_money') )
) AND wp_posts.post_type = 'page' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'future' OR wp_posts.post_status = 'draft' OR wp_posts.post_status = 'pending' OR wp_posts.post_status = 'private') GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 0, 10000
您可以使用带有meta的“WP_query”创建WP查询
例如：
$page_args=array(
'type' => "page",
'post_status' => 'publish',
'posts_per_page' => -1,
'caller_get_posts' => -1,
'meta_query' => array(
'relation' => 'AND',
array(
'key' => 'card_balance_transfer_rate',
'value' => array( "0", "14" ),
'type' => 'NUMERIC',
'compare' => 'BETWEEN'
)
)
);
$page_my_query = null;
$page_my_query = new WP_Query($page_args);
if( $page_my_query->have_posts() )
{
while ($page_my_query->have_posts()) : $page_my_query->the_post();
the_title();
endwhile;
}
wp_reset_query($page_my_query);
我在这里也遇到了元查询限制
我希望我能对你的问题投赞成票，因为限制没有很好的记录。谢谢你的贡献
你的问题让我意识到问题在于WP_查询限制了单个WP_查询中元查询子句的数量
编写自己的SQL查询是一个很好的解决方案。我决定在应用程序级别使用手动筛选，因为它是一个不依赖于性能的后端函数
解决方案：
似乎有5个元查询的限制，尽管将post状态设置为“草稿”似乎允许6个元查询，这更不寻常，可能与WP_查询的某种冲突/副作用有关
我能够删除其中一个元查询子句并手动筛选结果
要手动筛选的子句的选择应取决于哪个子句可以处理最小的数据集。请使用元代码共享您的完整查询。Hi-Shital。谢谢您的帮助。顺便说一句，我已将WP_query SQL添加到原始帖子中，因为它太长，无法包含在评论中。我已经尝试过了，它的有效期不超过6周ted和语句。实际上get_posts（）使用WP_Query（）请共享您的查询请参阅添加到原始帖子中的sql查询