当模板有新的WP_QUERY时，GET_TEMPLATE_PART()不会在Switch语句中触发

时间：2016-12-05 作者：WindowFrame10

我有一个页面模板，它有一个条件语句，可以使用get\\u template\\u part（）根据ACF字段值拉入不同的模板。两个模板部件文件中的代码都在条件语句之外工作，但在条件切换语句内部使用时不会工作，即如果我将两个模板部件文件的内容直接粘贴到主页模板中，代码将按预期工作。有人能解释为什么这不起作用吗？非常感谢您的帮助！

主模板代码：

<?php /* Template Name: Content Block Page Template */ get_header(); ?>

<?php
    $theTitleLowerCase = strtolower(get_the_title());
    $theTitleHyphenatedAndLowerCase = preg_replace(\'#[ -]+#\', \'-\', $theTitleLowerCase);
?>

<?php 
    $pageBackgroundImageUrl = get_field(\'page_background\');
    $pageBackgroundColor = get_field(\'page_background_color\');
    $invertTextColorTrueFalse = get_field(\'invert_text_color\');
    if ($invertTextColorTrueFalse == 1) {
        $inverttextColorClass = " invert-text-color";
    } else {
        $inverttextColorClass = "";
    };
?>

<div class="jumbotron">
    <?php get_template_part( \'content\', \'jumbotron\' ); ?>
</div>

<span class="b-header--sticky__scroll-check"></span>
<header class="b-header--sticky">
    <div class="l-container">
        <nav class="desktop-nav" role="navigation">
            <?php html5blank_nav(); ?>
        </nav>
    </div>
</header>

<main role="main">
    <?php while( have_rows(\'add_content_block\') ): the_row(); 
        $blockSelector = get_sub_field(\'select_content_block\');
    ?>

    <?php 
        switch ($blockSelector) {
            case "Speaker Block":
                get_template_part( \'content\', \'speakers\' );
                break;
            case "Events Block":
                get_template_part( \'content\', \'events\' );
                break;
            default:
                echo "Default";
        }
    ?>

    <?php endwhile; ?>

</main>

<?php get_footer(); ?>
在get\\u template\\u part（）调用的模板中，我有以下代码：

“发言人模板”：

<div class="page-wrap content-template-inner-page-speakers-php<?php echo $inverttextColorClass; ?>" style="background-image: url(<?php echo $pageBackgroundImageUrl; ?>); background-color: <?php echo $pageBackgroundColor; ?>;" id="<?php echo $theTitleHyphenatedAndLowerCase; ?>">
<h1>Speaker Template Baby</h1>
<section>
    <div class="l-container">
        <div class="speakers speakers-block">
            <!-- Keynote Speakers -->
            <?php
                $args3 = array(
                    \'post_type\' => \'the_speakers\',
                    \'tax_query\' => array(
                        array(
                            \'taxonomy\' => \'speakers_taxonomies\',
                            \'terms\' => \'keynote-speaker\',
                            \'field\' => \'slug\'
                        )
                    )
                );
                $theKeynoteSpeakers = new WP_Query($args3);
            ?>
            <div class="keynote-speakers l-grid">
                <?php while ($theKeynoteSpeakers->have_posts()) : $theKeynoteSpeakers->the_post(); ?>
                    <?php  
                        $speakerHeading = get_the_title();
                        $speakerSubHeading = get_field(\'speaker_job_title\');
                        $speakerBio = get_field(\'speaker_bio\');
                        $speakerImage = get_field(\'speaker_profile_image\');
                        $speakerCompanyImage = get_field(\'speaker_company_logo\');
                    ?>
                    <div class="l-grid__item l-grid__item--4 l-grid__item--lap-6 l-grid__item--palm-12 speaker">
                        <div class="speaker__image background-cover" style="background-image: url(<?php echo $speakerImage; ?>);"></div>
                        <div class="speaker__info"> 
                            <h3 class="speaker__heading">
                                <?php echo $speakerHeading; ?>
                            </h3>
                            <h5 class="speaker__sub-heading">
                                <?php echo $speakerSubHeading; ?>
                            </h5>
                            <a href="#0" class="b-button modal-opener speaker-modal-opener">See More</a>
                            <div class="speaker__modal b-screen b-screen--modal b-screen--modal--off-screen">
                                <div class="speaker__modal__inner b-screen__vertical-aligner">
                                    <i class="b-screen__modal-closer">X</i>
                                    <div class="l-grid">
                                        <div class="l-grid__item l-grid__item--4">
                                            <div class="speaker__image background-cover" style="background-image: url(<?php echo $speakerImage; ?>);"></div>
                                            <?php if ( $speakerCompanyImage ) :?>
                                                <div class="speaker__company-image-holder">
                                                    <img class="speaker__company-image" src="<?php echo $speakerCompanyImage; ?>" alt="Company Logo">
                                                </div>
                                            <?php endif; ?>
                                        </div>
                                        <div class="l-grid__item l-grid__item--8 speaker__modal__info">
                                            <h3 class="speaker__heading">
                                                <?php echo $speakerHeading; ?>
                                            </h3>
                                            <h5 class="speaker__sub-heading">
                                                <?php echo $speakerSubHeading; ?>
                                            </h5>
                                            <div class="speaker__bio">
                                                <?php echo $speakerBio; ?>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                <?php endwhile; ?>
            </div>

            <div class="text-center speakers-see-more">
                <a href="<?php echo home_url(); ?>/speakers" class="b-button">See More</a>
            </div>
            <div class="text-center show-more-speakers">
                <a href="#0" class="b-button show-more-speakers__btn">See More</a>
            </div>
        </div><!-- Speakers -->
    </div>
</section>
</div>
“事件模板部分”：

<div class="page-wrap content-template-inner-page-agenda-php<?php echo $inverttextColorClass; ?>" style="background-image: url(<?php echo $pageBackgroundImageUrl; ?>); background-color: <?php echo $pageBackgroundColor; ?>;" id="<?php echo $theTitleHyphenatedAndLowerCase; ?>">
<h1>Events Template Baby</h1>
<section id="agenda" class="pos-rel">
    <div class="l-container">

        <div class="events">
            <?php
                $args1 = array(
                    \'post_type\' => \'events\',
                    \'order\' => \'ASC\',
                    \'orderby\' => \'meta_value\',
                    \'meta_key\' => \'event_start_time\'
                );
                $nykEvents = new WP_Query($args1);
            ?>

            <ul class="b-list dis-blo agenda-block">
                <?php while ($nykEvents->have_posts()) : $nykEvents->the_post(); ?>

                    <?php  
                        $eventTitle = get_the_title();
                        $eventDescription = get_field(\'event_description\');
                        $eventStartDate = get_field(\'event_start_date\');
                        $eventEndDate = get_field(\'event_end_date\');
                        $eventStartTime = get_field(\'event_start_time\');
                        $eventEndTime = get_field(\'event_end_time\');
                        $eventSpeakers = get_field(\'event_speakers\'); // Repeater
                        $postId = get_the_ID();
                        $eventType = get_the_terms($postId, \'event_type\'); // Array of Taxonomies
                        $taxSlugArray = array();
                        foreach( $eventType as $eventSlug ) {
                            $taxSlugArray[] = $eventSlug->slug;
                        }
                    ?>

                    <li class="b-list__item l-grid l-grid--top agenda__item <?php foreach ( $taxSlugArray as $slug ) { echo "$slug "; }?>">
                        <div class="l-grid__item l-grid__item--4 agenda__time-type">
                            <span class="agenda__start-time"><?php echo $eventStartTime; ?></span>
                            <span class="agenda__time-breaker">to </span>
                            <span class="agenda__end-time"><?php echo $eventEndTime; ?></span>
                            <div class="agenda__type"></div>
                        </div>
                        <div class="l-grid__item l-grid__item--4 agenda__title-desc">
                            <h4 class="agenda__title"><?php echo $eventTitle; ?></h4>
                            <div class="agenda__desc"><?php echo $eventDescription; ?></div>
                        </div>
                        <div class="l-grid__item l-grid__item--4 agenda__speaker-info">
                            <?php while( have_rows(\'event_speakers\') ): the_row(); 
                                $eventSpeakerObject = get_sub_field(\'event_speaker\');
                                $eventSpeakerHeading = $eventSpeakerObject->post_title;
                                if($eventSpeakerObject){
                                    $eventSpeakerImage = get_field(\'speaker_profile_image\', $eventSpeakerObject->ID);
                                    $eventSpeakerSubHeading = get_field(\'speaker_job_title\', $eventSpeakerObject->ID);
                                    $eventSpeakerBio = get_field(\'speaker_bio\', $eventSpeakerObject->ID);
                                    $eventSpeakerCompanyImage = get_field(\'speaker_company_logo\', $eventSpeakerObject->ID);
                                }
                            ?>
                                <div class="speaker">
                                    <div class="speaker__image background-cover" style="background-image: url(<?php echo $eventSpeakerImage; ?>);"></div>
                                    <div class="speaker__info"> 
                                        <h3 class="speaker__heading">
                                            <?php echo $eventSpeakerHeading; ?>
                                        </h3>
                                        <h5 class="speaker__sub-heading">
                                            <?php echo $eventSpeakerSubHeading; ?>
                                        </h5>
                                        <a href="#0" class="b-button modal-opener speaker-modal-opener">See More</a>
                                        <div class="speaker__modal b-screen b-screen--modal b-screen--modal--off-screen">
                                            <div class="speaker__modal__inner b-screen__vertical-aligner">
                                                <i class="b-screen__modal-closer">X</i>
                                                <div class="l-grid">
                                                    <div class="l-grid__item l-grid__item--4">
                                                        <div class="speaker__image background-cover" style="background-image: url(<?php echo $eventSpeakerImage; ?>);"></div>
                                                        <?php if ( $eventSpeakerCompanyImage ) :?>
                                                            <div class="speaker__company-image-holder">
                                                                <img class="speaker__company-image" src="<?php echo $eventSpeakerCompanyImage; ?>" alt="Company Logo">
                                                            </div>
                                                        <?php endif; ?>
                                                    </div>
                                                    <div class="l-grid__item l-grid__item--8 speaker__modal__info">
                                                        <h3 class="speaker__heading">
                                                            <?php echo $eventSpeakerHeading; ?>
                                                        </h3>
                                                        <h5 class="speaker__sub-heading">
                                                            <?php echo $eventSpeakerSubHeading; ?>
                                                        </h5>
                                                        <div class="speaker__bio">
                                                            <?php echo $eventSpeakerBio; ?>
                                                        </div>
                                                    </div>
                                                </div>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                            <?php endwhile; ?>
                        </div>
                    </li>
                <?php endwhile; ?>
            </ul>
        </div><!-- Events -->

    </div>
</section>
</div>

1 个回复
SO网友:Tom J Nowell

The problem: 代码在查询后从不清理

您的查询当前缺少以下内容：

代码从不检查查询是否通过if ( $q->have_posts() )wp_reset_postdatathe_post 或setup_postdata, 你改变了全球$post 变量这可能会导致在循环之后运行的任何代码出现问题，因为post上下文不再是页面的post，而是查询循环的最后一个post。

使命感wp_reset_postdata 应该修复此问题，但只有在查询找到帖子时才能调用它。如果不这样做，则可能会导致嵌套循环出现问题或速度减慢，以及其他意外行为。

这是一个理想化的WP_Query 回路：

$args = array(
    // ....
);
$q = new \\WP_Query( $args );
if ( $q->have_posts() ) {
    while( $q->have_posts() {
        $q->the_post();
        // display post
    }
    wp_reset_postdata();
} else {
    echo \'no posts found\';
}

标签： php   theme-development   小码农  

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