使用带有液体标签的液体过滤器

问题描述

我在组合液体标签和液体过滤器/管道时遇到麻烦.

I'm having trouble combining a Liquid Tag and a Liquid filter/pipe.

尽管我认为这是一个通用问题，并且与特定插件无关，但是如果相关，我将使用 jekyll-exiftag .

Though I think this is a generic question and not related to the specific plugin, but in case it is relevant, I am using jekyll-exiftag.

标签为:{% exiftag date_time_digitized,{{image_dir}},{{image_name}} %}.该命令为我提供了拍摄给定照片的日期时间.而且有效.所以下面的代码:

The tag is: {% exiftag date_time_digitized,{{image_dir}},{{image_name}} %}. This command gives me the datetime that the given photo was taken. And it works. So the following code:

<p>{% exiftag date_time_digitized,{{image_dir}},{{image_name}} %}</p>

正确生成以下输出: 2017-03-04 12:09:23 +0100

我正在尝试使用Liquid date过滤器格式化日期.

I am trying to use the Liquid date filter to format the date.

要测试，以下代码:

<p>{{ '2013-11-29 00:00:00 -0500' | date: '%B %d, %Y' }}</p>

正确生成以下输出: 2013年11月29日

但是，我无法将输出的日期时间通过管道传递到日期过滤器中.

However, I'm not able to pipe the outputted datetime into the date filter.

我尝试了两种方法:

方法1:

<p>{% exiftag date_time_digitized,{{image_dir}},{{image_name}} | date: '%B %d, %Y' %}</p>

方法2:

{% assign image_date = exiftag date_time_digitized,{{image_dir}},{{image_name}} %}
<p>{{ image_date | date: '%B %d, %Y' }}</p>

即使没有过滤器，以下内容也没有输出.

Even the following, without the filter, has no output.

{% assign image_date = exiftag date_time_digitized,{{image_dir}},{{image_name}} %}
<p>{{ image_date }}</p>

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我觉得这是一个Liquid语法问题，但是我自己搞不清楚.如果您对此问题有任何见解，我将不胜感激！

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I feel like this is a Liquid syntax issue, but I am having trouble figuring it out on my own. I would appreciate any insight into this problem!

推荐答案

我能够使用捕获来做到这一点:

I was able to use capture to do this:

{% capture image_date %}
  {% exiftag date_time,{{image_dir}},{{image_name}} %}
{% endcapture %}

<p>{{ image_date | date: '%-m/%-d/%y' }}</p>

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