Truncates a string after a given length, keeping the last word complete.
This filter is more precise than the default truncatewords
filter.
Words length vary too much, 10 words may result in 40 or 70 characters, so cutting by character count makes more sense.
There is a blog post about this snippet (in Portuguese).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | 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) + '...'
|
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