添加条件到mustache / php

Question

考虑：

<?php
/**
 * Single variation display
 *
 * This is a javascript-based template for single variations (see https://codex.wordpress.org/Javascript_Reference/wp.template).
 * The values will be dynamically replaced after selecting attributes.
 *
 * @see     https://docs.woocommerce.com/document/template-structure/
 * @author  WooThemes
 * @package WooCommerce/Templates
 * @version 2.5.0
 */
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}
?>
<script type="text/template" id="tmpl-variation-template">
    <div class="woocommerce-variation-description">{{{ data.variation.variation_description }}}</div>

    <div class="woocommerce-variation-price">{{{ data.variation.price_html }}}</div>

    <div class="woocommerce-variation-availability">{{{ data.variation.availability_html }}}</div>

 <div class="woocommerce-variation-custom-text-field">
        GTIN: <span class="sku">{{{ data.variation.wccaf_gtin }}}</span>
    </div>

 <div class="woocommerce-variation-custom-text-field">
        MPN: <span class="sku">{{{ data.variation.wccaf_mpn }}}</span>
    </div>

</script>
<script type="text/template" id="tmpl-unavailable-variation-template">
    <p><?php _e( 'Sorry, this product is unavailable. Please choose a different combination.', 'woocommerce' ); ?></p>
</script>

如何实现条件，以便IF {{{ data.variation.wccaf_gtin }}}返回空白/空值，然后回显“GTIN不可用”？

我尝试过的：

我在wiki上看过这个：

带有标签的模板：

{{#x}}一些文字{{/ x}}这里，当x是一个布尔值时，section标签就像一个if条件

所以我试过了

 <div class="woocommerce-variation-custom-text-field">
        GTIN: <span class="sku">{{#repo}}{{ data.variation.wccaf_gtin }}{{/repo}}{{^repo}}N/A{{/repo}}</span>
    </div>

这不起作用。

但我对小胡子完全不熟悉，我需要一些指导。

Answer 1

根据Mustache Documentation

// if exist
{{#repo}}
  <b>{{name}}</b>        
{{/repo}}

// if not exist
{{^repo}}
  No repos :(
{{/repo}}

你可以试试这个

<div class="woocommerce-variation-custom-text-field">
        GTIN: <span class="sku">{{#data.variation.wccaf_gtin}}{{ data.variation.wccaf_gtin }}{{/data.variation.wccaf_gtin}}{{^data.variation.wccaf_gtin}}N/A{{/data.variation.wccaf_gtin}}</span>
</div>

Answer 2

这不是一个Mustache模板，因为评论指出它是WordPress自定义wp.template解决方案。

它没有任何逻辑标签，但有评估标签<# #>。

从快速谷歌这里是一个例子，你会如何使用它们写支票：

  <# if ( data.trueValue ) { #>
    <p> I am only output if <code>data.trueValue</code> is true.
  <# } #>

通过https://lkwdwrd.com/wp-template-js-templates-wp

Answer 3

使用ints-jst尝试相同的方法

码：

<div id="try-jst">
            <div class="woocommerce-variation-description">
                <js-t> print(data.variation.variation_description);</js-t>
            </div>

            <div class="woocommerce-variation-price">
                <js-t> print(data.variation.price_html);</js-t>
            </div>

            <div class="woocommerce-variation-availability">
                <js-t> print(data.variation.availability_html);</js-t>
            </div>

            <div class="woocommerce-variation-custom-text-field">
                GTIN:
                <span class="sku">
            <js-t>
                if(!!data.variation.wccaf_gtin) {
                   print(data.variation.wccaf_gtin);
                } else {
                   print("unavailable");
                }
            </js-t>
        </span>
            </div>
            <div class="woocommerce-variation-custom-text-field">
                MPN:
                <span class="sku">
            <js-t>
                if(!!data.variation.wccaf_mpn) {
                   print(data.variation.wccaf_mpn);
                } else {
                   print("unavailable");
                }
            </js-t>
        </span>
            </div>
        </div>

脚本：

<script>
    /* var data = {
        variation: {
            variation_description: 'variation_description',
            price_html: 'price_html',
            availability_html: 'availability_html',
            wccaf_gtin: '',
            wccaf_mpn: '123',
        }
    }; */
    // jQuery version
    compile($('#try-jst')[0]);
    run();

    // Plain Javascript
    /**
     * compile(document.getElementById('try-jst'));
     * run();
     */
</script>

输出：

<div id="try-jst">
                <div class="woocommerce-variation-description">variation_description</div>
                <div class="woocommerce-variation-price">price_html</div>
                <div class="woocommerce-variation-availability">availability_html</div>
                <div class="woocommerce-variation-custom-text-field"> GTIN: <span class="sku">unavailable</span></div>
                <div class="woocommerce-variation-custom-text-field"> MPN: <span class="sku">123</span></div>
            </div>

所以你可以尝试一下。