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Wordpress小部件从短代码变量wp_query参数(Wordpress widget wp_query params from shortcode variable)

 我有一个显示边栏中相关文章的小部件。 我想使用页面中的简码来操作小部件的wp_query参数。  
 我想这样做的原因是它是一个多页帖子（带分页符），每个页面都与不同的分类有关。 我希望小部件根据特定页面显示推荐的帖子。  
 我不确定如何在运行wp_query之前使小部件评估短代码($a["cat"]) 。  
 简码功能：  
    //[bartag cat="computers"]
function bartag_func( $atts ) {
        $a = shortcode_atts( array('cat' => ''), $atts );

        return $a['cat'];
}
add_shortcode( 'bartag', 'bartag_func' );
 
 小部件功能：  
class related_articles_Widget extends WP_Widget {

    /**
     * Register widget with WordPress.
     */
    function __construct() {
        parent::__construct(
            'related_articles_Widget', // Base ID
            esc_html__( 'related_articles_Widget', 'text_domain' ), // Name
            array( 'description' => esc_html__( '', 'text_domain' ), ) // Args
        );
    }

    public function widget( $args, $instance ) {
        echo $args['before_widget'];


        $args = array( 'post_type' => 'post', 
                'posts_per_page' => 3,
                'category_name' => $a['cat']
                ) 

            $loop = new WP_Query( $args );

            while ( $loop->have_posts() ) : $loop->the_post(); 

            get_template_part( 'template-parts/content', 'small-article-template');

        endwhile; 
        wp_reset_query();
        }

    } 

function register_related_articles_Widget() {
    register_widget( 'related_articles_Widget' );
}
add_action( 'widgets_init', 'register_related_articles_Widget' );

I have a widget that shows related posts in the sidebar. I would like to manipulate the widget's wp_query parameters using a shortcode in the page. 
The reason I would like to do so is that it's a multipages post (with page breaks) and each page is related to a different category. I would like the widget to show recommended posts according to the specific page. 
I am not sure how to make the widget evaluate the shortcode ($a["cat"]) before running the wp_query. 
Shortcode function: 
    //[bartag cat="computers"]
function bartag_func( $atts ) {
        $a = shortcode_atts( array('cat' => ''), $atts );

        return $a['cat'];
}
add_shortcode( 'bartag', 'bartag_func' );
 
The widget function:  
class related_articles_Widget extends WP_Widget {

    /**
     * Register widget with WordPress.
     */
    function __construct() {
        parent::__construct(
            'related_articles_Widget', // Base ID
            esc_html__( 'related_articles_Widget', 'text_domain' ), // Name
            array( 'description' => esc_html__( '', 'text_domain' ), ) // Args
        );
    }

    public function widget( $args, $instance ) {
        echo $args['before_widget'];


        $args = array( 'post_type' => 'post', 
                'posts_per_page' => 3,
                'category_name' => $a['cat']
                ) 

            $loop = new WP_Query( $args );

            while ( $loop->have_posts() ) : $loop->the_post(); 

            get_template_part( 'template-parts/content', 'small-article-template');

        endwhile; 
        wp_reset_query();
        }

    } 

function register_related_articles_Widget() {
    register_widget( 'related_articles_Widget' );
}
add_action( 'widgets_init', 'register_related_articles_Widget' );

原文：https://stackoverflow.com/questions/43915562

更新时间：2023-06-22 20:06

最满意答案

 停止搞乱UOW（这是一种黑客行为），只需再次冲洗它：  
 配置  
services:
    bill.listener:
        class: MyCompany\CompanyBundle\EventListener\BillListener
        arguments: ["@pdf_service"]
        tags :
            - { name: doctrine.event_subscriber, connection: default }
 
 倾听者  
<?php

namespace MyCompany\CompanyBundle\EventListener;

use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Doctrine\Common\EventSubscriber;
use Doctrine\ORM\Event\OnFlushEventArgs;
use Doctrine\ORM\Event\PostFlushEventArgs;

use MyCompany\CompanyBundle\Service\MyPDFService;
use MyCompany\CompanyBundle\Entity\Bill;

class BillListener implements EventSubscriber
{
    protected $pdfs;
    protected $bills;

    public function __construct(MyPDFService $pdfs)
    {
        $this->pdfs = $pdfs;
    }

    public function getSubscribedEvents()
    {
        return [
            'onFlush',
            'postFlush'
        ];
    }

    public function onFlush(OnFlushEventArgs $event)
    {
        $this->bills = [];
        /* @var $em \Doctrine\ORM\EntityManager */
        $em = $event->getEntityManager();
        /* @var $uow \Doctrine\ORM\UnitOfWork */
        $uow = $em->getUnitOfWork();

        foreach ($uow->getScheduledEntityInsertions() as $entity) {

            if ($entity instanceof Bill) {

                $this->bills[] = $entity;
            }
        }
    }

    public function postFlush(PostFlushEventArgs $event)
    {
        if (!empty($this->bills)) {

            /* @var $em \Doctrine\ORM\EntityManager */
            $em = $event->getEntityManager();

            foreach ($this->bills as $bill) {

                /* @var $bill \MyCompany\CompanyBundle\Entity\Bill */
                $this->pdfs->generateFor($bill);
                $em->persist($bill);
            }

            $em->flush();
        }
    }
}

Stop messing with the UOW (it's kind of hacking), just flush it again: 
Config 
services:
    bill.listener:
        class: MyCompany\CompanyBundle\EventListener\BillListener
        arguments: ["@pdf_service"]
        tags :
            - { name: doctrine.event_subscriber, connection: default }
 
Listener 
<?php

namespace MyCompany\CompanyBundle\EventListener;

use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Doctrine\Common\EventSubscriber;
use Doctrine\ORM\Event\OnFlushEventArgs;
use Doctrine\ORM\Event\PostFlushEventArgs;

use MyCompany\CompanyBundle\Service\MyPDFService;
use MyCompany\CompanyBundle\Entity\Bill;

class BillListener implements EventSubscriber
{
    protected $pdfs;
    protected $bills;

    public function __construct(MyPDFService $pdfs)
    {
        $this->pdfs = $pdfs;
    }

    public function getSubscribedEvents()
    {
        return [
            'onFlush',
            'postFlush'
        ];
    }

    public function onFlush(OnFlushEventArgs $event)
    {
        $this->bills = [];
        /* @var $em \Doctrine\ORM\EntityManager */
        $em = $event->getEntityManager();
        /* @var $uow \Doctrine\ORM\UnitOfWork */
        $uow = $em->getUnitOfWork();

        foreach ($uow->getScheduledEntityInsertions() as $entity) {

            if ($entity instanceof Bill) {

                $this->bills[] = $entity;
            }
        }
    }

    public function postFlush(PostFlushEventArgs $event)
    {
        if (!empty($this->bills)) {

            /* @var $em \Doctrine\ORM\EntityManager */
            $em = $event->getEntityManager();

            foreach ($this->bills as $bill) {

                /* @var $bill \MyCompany\CompanyBundle\Entity\Bill */
                $this->pdfs->generateFor($bill);
                $em->persist($bill);
            }

            $em->flush();
        }
    }
}

Wordpress小部件从短代码变量wp_query参数(Wordpress widget wp_query params from shortcode variable)

最满意答案

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