WordPress搜索不能使用超过2个字符

时间：2017-08-16 15:08:25

标签： wordpress search

我创建了一个自定义模板，用于搜索我们的产品，其中包含大量过滤器和一个输入字段，可以搜索字符。但是，它只能使用一个或两个字符，如“a”，“ag”，但不能超过两个字符。如果我搜索“pol”或“polar”之类的东西，它会将我重定向到WordPress 404 - PAGE NOT FOUND。

更新

我尝试了两个解决方案：一个使用自定义查询ajax，并且搜索工作正常，但我遇到的唯一问题是分页;另一个使用WordPress标准查询对象，它适用于分页，但我遇到了搜索字符长度的问题。以下是我尝试的两次尝试。

尝试＃1 ：使用Ajax。这段代码写在function.php文件中

function get_search_results()
{
    global $wpdb;

    if(!empty($_POST['search_input'])) {
        $search_input = $_POST['search_input'];

        $where = 'pm.meta_value LIKE '. "'%".$search_input."%'".' AND pm.meta_key LIKE "%pattern_number"';
        $where1 = 'p.post_title LIKE '."'%".$search_input."%'".' AND p.post_type = "product"';

        $search_sql = 'SELECT DISTINCT(pm.post_id), ph.lightness, ph.color_label FROM wp_posts p 
                                INNER JOIN wp_products_huecolor ph on p.ID = ph.post_id
                                INNER JOIN wp_postmeta pm ON p.ID = pm.post_id 
                                WHERE p.post_status = "publish" AND p.post_type = "product" AND (('.$where.') OR ('.$where1.')) ORDER BY ph.color_label, ph.lightness ASC';

        $total_query = "SELECT COUNT(1) FROM (${search_sql}) AS combined_table";
        $total = $wpdb->get_var( $total_query );
        $items_per_page = 10;
        $page = isset( $_GET['cpage'] ) ? abs( (int) $_GET['cpage'] ) : 1;
        $offset = ( $page * $items_per_page ) - $items_per_page;
        $page = $wpdb->get_results( $search_sql.' LIMIT '.$offset.', '.$items_per_page );


       //echo "SQL = ".$wpdb->last_query; wp_die();
       echo '<ul>';
        foreach ($page as $object)
        {
            // get custom fields values related to a post by post id
            $fields = get_fields($object->post_id);

            // get post details by post id
            $post_detail =  get_post($object->post_id, $object );

            $brand_name = $fields[brand]->name;
            $full_sheet_image = $fields[full_sheet_image][sizes][thumbnail];
            $post_title = $post_detail->post_title;
            $post_name = $post_detail->post_name;

        ?>

    <li class="post-pattern">
        <div class="search-productsBoxSecond">
            <a target="_blank" href="<?php echo site_url( '/products/'.$post_name.'', 'http' ); ?>"><img src="<?php echo $full_sheet_image; ?>" alt="" class="vc_single_image-img attachment-full"></a>
            <div class="search-productNameSecond"><a target="_blank" href="<?php echo site_url( '/products/'.$post_name.'', 'http' ); ?>"><?php echo $post_title; ?></a></div>
            <div class="search-productBrandSecond"><?php echo $brand_name; ?></div>
        </div>
    </li>
    <?php
        }
        echo '</ul>';
        echo '<div class="search-product-navigation">';
        echo paginate_links( array(
            'base' => add_query_arg( 'cpage', '%#%', site_url( '/pattern-search/' ) ),
            'format' => '',
            'prev_text' => __('&laquo;'),
            'next_text' => __('&raquo;'),
            'total' => ceil($total / $items_per_page),
            'current' => $page
        ));
        echo '</div>';

    }
    exit();
}


add_action('wp_ajax_nopriv_filter_featured_products','filter_featured_products');
add_action('wp_ajax_filter_featured_products','filter_featured_products');

尝试＃2 ：使用自定义模板中的标准WP_Query。

<?php 

$args = array();
$paged = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;
$search_keywords = ( get_query_var( 's' ) ) ? get_query_var( 's' ) : ""; 
if(isset($search_keywords) && $search_keywords != ''){
    $args = array(
            'post_type'         => 'product',
            'search_prod_title' => $search_keywords,
            'post_status'       => 'publish',
            'posts_per_page'    => 10,
            'paged'             => $paged,
            'wildcard_on_key'   => true,
            'meta_query'        => array(
                                    array(
                                        'key'       => 'product_type_%_pattern_number',
                                        'value'     => $search_keywords,
                                        'compare'   => 'LIKE',
                                    ),
            )
        );
}else{
    $args = array(
            'post_type'         => 'product',
            'post_status'       => 'publish',
            'posts_per_page'    => 10,
            'paged'             => $paged
        );
}


// query for getting featured product
add_filter( 'posts_fields', 'products_posts_select_filter', 10, 2 );
add_filter( 'posts_join', 'products_posts_join_filter', 10, 2 );    
add_filter( 'posts_where', 'title_filter', 10, 2 ); 
add_filter( 'posts_orderby', 'products_posts_orderby', 10, 2 ); 
add_filter('posts_groupby', 'products_posts_groupby', 10, 2);
$sql_query = new WP_Query( $args ); 

//echo $wpdb->last_query; die();
//echo '<pre>'; print_r($sql_query); die;
//echo $sql_query->request; die;
remove_filter( 'posts_fields', 'products_posts_select_filter', 10, 2 );
remove_filter( 'posts_join', 'products_posts_join_filter', 10, 2 );
remove_filter( 'posts_where', 'title_filter', 10, 2 );
remove_filter( 'posts_orderby', 'products_posts_posts_orderby', 10, 2 ); 
remove_filter('posts_groupby', 'products_posts_groupby', 10, 2);
if( $sql_query->have_posts()):
    echo '<ul>';
    while( $sql_query->have_posts()): $sql_query->the_post();
    {
        //get custom fields meta values related to a post
        $fields = get_fields($post->ID);
        $full_sheet_image = $fields[full_sheet_image][sizes][thumbnail];

        //echo'<pre>'; print_r($post_detail); die;
?>

        <li class="post-pattern">
            <div class="search-productsBoxSecond">
                <a target="_blank" href="<?php echo site_url( '/products/'.$post->post_name.'', 'http' ); ?>"><img src="<?php echo $full_sheet_image; ?>" alt="" class="vc_single_image-img attachment-full"></a>
                <div class="search-productNameSecond"><a target="_blank" href="<?php echo site_url( '/products/'.$post->post_name.'', 'http' ); ?>"><?php echo $post->post_title; ?></a></div>
                <div class="search-productBrandSecond"><?php echo $fields[brand]->name; ?></div>
            </div>
        </li>

<?php
    }
    endwhile; ?>

    </ul>

    <!-- pagination -->
    <div class="search-product-navigation">
        <?php
              echo paginate_links(array(
                'total' => $sql_query->max_num_pages
              ));
        ?>
    </div>

<?php endif; ?>

这里是函数.php

中编写的过滤函数 
/*Replaced meta_key = with meta_key LIKE */
add_filter( 'posts_where', function ( $where, \WP_Query $q )
{ 
    // Check for our custom query var
    if ( true !== $q->get( 'wildcard_on_key' ) )
        return $where;

    // Lets filter the clause
    $where = str_replace( 'meta_key =', 'meta_key LIKE', $where );

    return $where;
}, 10, 2 );

function title_filter( $where, &$wp_query )
{
    global $wpdb;
    if ( $search_term = $wp_query->get( 'search_prod_title' ) ) { 
        $post_title_clause = '('.$wpdb->posts . '.post_title LIKE \'%' . esc_sql( like_escape( $search_term ) ) . '%\') OR';
        $where = substr_replace($where, $post_title_clause , 6, 0);
    }
    return $where;
}

function products_posts_select_filter( $fields, &$wp_query ){

    $fields = 'DISTINCT(wp_posts.ID), wp_posts.post_title, wp_posts.post_name, ph.lightness, ph.color_label';
    return $fields;

}

function products_posts_join_filter( $join, &$wp_query ){

    $join .= " INNER JOIN wp_products_huecolor ph on wp_posts.ID = ph.post_id";
    return $join ;

}

function products_posts_orderby( $orderby, &$wp_query ){

    $orderby = 'ph.color_label, ph.lightness ASC';
    return $orderby;    

}

function products_posts_groupby( $groupby, &$wp_query ){

    return $groupby = '';

}

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