使用元查询进行自定义搜索

Question

我一直在构建自定义搜索。搜索功能有多个下拉列表，用户可以留空，或从多个选项中进行选择。这些数据保存在'wine-note'自定义帖子类型的帖子的自定义字段中。

到目前为止它工作有点。我的搜索结果页面看起来像这样：

<?php 
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1; 
query_posts(array(
'post_type' => 'wine-note', 
'posts_per_page' => '10', 
'paged' => $paged, 
'meta_query' => array(
    array(
     'key' => 'vintage', 
     'value' => $vintage_select, 
     'compare' => 'LIKE' 
     ), 
    array(
     'key' => 'full_list_regions', 
     'value' => $region_select, 
     'compare' => 'LIKE' 
     ), 
    array(
     'key' => 'producer_name', 
     'value' => $winery_select, 
     'compare' => 'LIKE' 
     ), 
    array(
     'key' => 'S100', 
     'value' => $score_100_from, 
     'compare' => '>=' 
     ), 
    array(
     'key' => 'S100', 
     'value' => $score_100_to, 
     'compare' => '<=' 
     ), 
    array(
     'key' => 'S20', 
     'value' => $score_20_from, 
     'compare' => '>=' 
     ), 
    array(
     'key' => 'S20', 
     'value' => $score_20_to, 
     'compare' => '<=' 
     ), 
    array(
     'key' => 'wine_rating', 
     'value' => $rating_from_select, 
     'compare' => '>=' 
     ), 
    array(
     'key' => 'wine_rating', 
     'value' => $rating_to_select, 
     'compare' => '<=' 
     ) 
     ) 
     ));?> 

的问题，这是搜索排除不具有特定的自定义字段，即使该下拉选择留空任何职务。

即时通讯 - 只显示包含所有自定义字段（数据与否）的帖子。

因此，我修改了一下我的代码，添加了一些if语句，以便只在用户从下拉列表中选择一个选项时才搜索该自定义字段。 我现在的搜索结果代码如下所示：

<?php 
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1; 
query_posts($args = array(
'post_type' => 'wine-note', 
'posts_per_page' => '10', 
'paged' => $paged, 
'meta_query' => array(

     ) 
     ) 

if ($vintage_select) { 
$args['metaquery'][] = array(
    'key' => 'vintage', 
    'value' => $vintage_select, 
    'compare' => 'LIKE' 
); 
} 

if ($region_select) { 
$args['metaquery'][] = array(
    'key' => 'full_list_regions', 
    'value' => $region_select, 
    'compare' => 'LIKE' 
); 
} 

if ($winery_select) { 
$args['metaquery'][] = array(
    'key' => 'producer_name', 
    'value' => $winery_select, 
    'compare' => 'LIKE' 
); 
} 

if ($score_100_from) { 
$args['metaquery'][] = array(
    'key' => 'S100', 
    'value' => $score_100_from, 
    'compare' => '>=' 
); 
} 

if ($score_100_to) { 
$args['metaquery'][] = array(
    'key' => 'S100', 
    'value' => $score_100_to, 
    'compare' => '<=' 
); 
} 

if ($score_20_from) { 
$args['metaquery'][] = array(
    'key' => 'S20', 
    'value' => $score_20_from, 
    'compare' => '>=' 
); 
} 

if ($score_20_to) { 
$args['metaquery'][] = array(
    'key' => 'S20', 
    'value' => $score_20_to, 
    'compare' => '<=' 
); 
} 

if ($rating_from_select) { 
$args['metaquery'][] = array(
    'key' => 'wine_rating', 
    'value' => $rating_from_select, 
    'compare' => '>=' 
); 
} 

if ($rating_to_select) { 
$args['metaquery'][] = array(
    'key' => 'wine_rating', 
    'value' => $rating_to_select, 
    'compare' => '<=' 
); 
} 
); 
?> 

现在，出于某种原因，这将导致自定义字段下拉选择到不行。无论用户输入什么内容，所有搜索结果都会返回，所有我指的是该自定义帖子类型的所有帖子。

我上面的代码有什么问题吗？ 我似乎无法找出这一个！

顺便说一句，我使用下面的代码正确定义所有的变量（我认为）在搜索结果的PHP模板的顶部：

<?php 
$vintage_select = $_POST['vintage_select']; 
$region_select = $_POST['region_select']; 

$winery_select = $_POST['winery_select']; 
$score_100_from = $_POST['score_100_from']; 
$score_100_to = $_POST['score_100_to']; 
$score_20_from = $_POST['score_20_from']; 
$score_20_to = $_POST['score_20_to']; 
$rating_from_select = $_POST['rating_from_select']; 
$rating_to_select = $_POST['rating_to_select']; 
?> 

Answer 1

第二个代码片段被搞砸。你在query_posts()函数的参数列表中有条件。

在将它传递给$args数组之前，首先创建并填充您的'meta_query'项目。

实施例：

$paged = (get_query_var('paged')) ? get_query_var('paged') : 1; 

$metaList = [ 
    'vintage_select'=>['vintage','LIKE'], 
    'region_select'=>['full_list_regions','LIKE'], 
    'winery_select'=>['producer_name','LIKE'], 
    'score_100_from'=>['S100','>='], 
    'score_100_to'=>['S100','<='], 
    'score_20_from'=>['S20','>='], 
    'score_20_to'=>['S20','<='], 
    'rating_from_select'=>['wine_rating','>='], 
    'rating_to_select'=>['wine_rating','<='], 

]; 

$metaQuery = []; 

foreach ($metaList as $key=>$item) 
    if(isset($$key) && $$key) $metaQuery[] = ['key'=>$item[0], 'compare'=>$item[1], 'value'=>$$key]; 

$args = [ 
    'post_type' => 'wine-note', 
    'posts_per_page' => '10', 
    'paged' => $paged, 
    'metaquery'=> $metaQuery 
]; 

query_posts($args);