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Date/time util template filters

Author:
marinho
Posted:
November 15, 2007
Language:
Python
Version:
.96
Score:
1 (after 1 ratings)

Explanations:

  • the series "is_*_of" was created 'cos it's easier write: {% if 10|is_day_of:date and user %} than write: {% ifequal date.day 10 %}{% if user %}...
  • the series "inc/dec" is not complete, but can the extended to day, hour, minute, etc as you needs. It's util to inc 10 months since 05/31/2006 by example and get a 2007's date :)

Setup:

Insert the snippet into an_app/templatetags/datetimeutils.py.

Use in template:

{% load datetimeutils %} and use filters as following:

  • {{ 30|is_day_of:a_date_time_variable }}
  • {{ 11|is_month_of:a_date_time_variable }}
  • {{ 2006|is_year_of:a_date_time_variable }}
  • {{ 58|is_minute_of:a_date_time_variable }}
  • {{ 23|is_hour_of:a_date_time_variable }}
  • {{ a_date_time_variable|dec_year:2 }}
  • {{ a_date_time_variable|dec_month:2 }}
  • {{ a_date_time_variable|inc_year:2 }}
  • {{ a_date_time_variable|inc_month:2 }}
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from django.template import Library
from datetime import datetime, timedelta

@register.filter
def is_day_of(value,arg):
    return (arg and value) and arg.day == int(value)

@register.filter
def is_month_of(value,arg):
    return (arg and value) and arg.month == int(value)

@register.filter
def is_year_of(value,arg):
    return (arg and value) and arg.year == int(value)

@register.filter
def is_hour_of(value,arg):
    return (arg and value) and arg.hour == int(value)

@register.filter
def is_minute_of(value,arg):
    return (arg and value) and arg.minute == int(value)

@register.filter
def dec_year(value,arg):
    delta = type(arg) != types.IntType and int(arg) or arg
    return value - timedelta(365 * delta)

@register.filter
def dec_month(value,arg):
    delta = type(arg) != types.IntType and int(arg) or arg
    return value - timedelta(30 * delta)

@register.filter
def inc_year(value,arg):
    delta = type(arg) != types.IntType and int(arg) or arg
    return value + timedelta(365 * delta)

@register.filter
def inc_month(value,arg):
    delta = type(arg) != types.IntType and int(arg) or arg
    return value + timedelta(30 * delta)

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