django - 如何使用 truncatewords 在 Django 模板中添加省略号而不需要最后的空格？

Question

truncatewords 过滤器在省略号前插入一个空格。如，“一本精美的节 eclipse 谱书……”
与期望的相比
“一本精美的节 eclipse 谱书……”

有没有一种简单的方法可以让这个过滤器不在那里放置空格？我可以很轻松地在 View 中处理此问题，但更喜欢在模板中执行此操作 - 理想情况下无需创建自定义过滤器。欢迎提出任何建议。

Answer 1

Djangosnippets 有一堆模板过滤器，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) + '...'