如何在Django模板中使用不带最后空格的truntewords添加省略号?

有很多模板过滤器 Djangosnippets ,和 this one looks pretty neat

# From http://djangosnippets.org/snippets/1259/

from django import template

register = template.Library()

@register.filter
def truncatesmart(value, limit=80):
    """
    Truncates a string after a given number of chars keeping whole words.

    Usage:
        {{ string|truncatesmart }}
        {{ string|truncatesmart:50 }}
    """

    try:
        limit = int(limit)
    # invalid literal for int()
    except ValueError:
        # Fail silently.
        return value

    # Make sure it's unicode
    value = unicode(value)

    # Return the string itself if length is smaller or equal to the limit
    if len(value) <= limit:
        return value

    # Cut the string
    value = value[:limit]

    # Break into words and remove the last
    words = value.split(' ')[:-1]

    # Join the words and return
    return ' '.join(words) + '...'

这也将起作用:

{{ value|truncatewords:3|slice:"-4" }}...

基本上,只需切掉最后4个字符(椭圆加空格),然后不加空格地把它加回去!