flex/templates/partial/og_article.html

{% if OG_LOCALE %}
  {% set default_locale = OG_LOCALE %}
{% else %}
  {% set default_locale = 'en_US' %}
{% endif %}
<meta property="og:site_name" content="{{ SITENAME }}"/>
<meta property="og:title" content="{{ article.title|striptags }}"/>
<meta property="og:description" content="{{ article.summary|striptags }}"/>
<meta property="og:locale" content="{{ article.metadata.get('og_locale', default_locale) }}"/>
<meta property="og:url" content="{{ SITEURL }}/{{ article.url }}"/>
<meta property="og:type" content="article"/>
<meta property="article:published_time" content="{{ article.date }}"/>
<meta property="article:modified_time" content="{{ article.modified }}"/>
<meta property="article:author" content="{{ SITEURL }}/{{ article.author.url }}">
<meta property="article:section" content="{{ article.category.name }}"/>
{% for tag in article.tags %}
<meta property="article:tag" content="{{ tag.name }}"/>
{% endfor %}
{% if 'cover' in article.metadata %}
<meta property="og:image" content="{{ SITEURL }}/{{ article.metadata['cover'] }}">
{% else %}
<meta property="og:image" content="{{ SITELOGO }}">
{% endif %}