Django CMS - check if placeholder is empty

Question

I use:

• DjangoCMS 2.4
• Django 1.5.1
• Python 2.7.3

I would like to check if my placeholder is empty.

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Answer 1

Based on the great answer form @Philip Zedler, a solution that works for both placeholder on django-cms pages, but also on placeholders "outside of the cms".

@register.filter()
def placeholder_empty(page_placeholder, slot=None):
    """
    for page/slot, pass a page object, and a slot name:  
    {% if request.current_page|djangocms_misc_placeholder_empty:"content" %}

    for a outside page placeholder, just the placeholder object:
    {% if object.placeholderfield|djangocms_misc_placeholder_empty %}

    also, with:
    {% with ph_empty=object.placeholderfield|djangocms_misc_placeholder_empty %}
    """
    placeholder = None
    if isinstance(page_placeholder, Placeholder):
        placeholder = page_placeholder
    elif isinstance(page_placeholder, Page):
        page = page_placeholder
        try:
            placeholder = page.placeholders.get(slot=slot)
        except Placeholder.DoesNotExist:
            pass
    if placeholder:
        # // return not placeholder.cmsplugin_set.filter(language=get_language()).exists()
        return not placeholder.cmsplugin_set.exists()
    return False

usage in template

{% if request.current_page|placeholder_empty:'content' %}
    
Fallback!
{% endif %}

It's in my djangocms-misc package