Problem with a token in my custom template tag

[Daniel Grace]

Hi,

I'm encountering the following problem with a token in my custom template tag:

Request Method: GET

Request URL: http://127.0.0.1:8000/flows/

Django Version: 1.7

Exception Type: ValueError

Exception Value:

need more than 2 values to unpack

Exception Location: C:\landy\cresta\flow\templatetags\flow_extras.py in rowcolour, line 7

Here is the template file:

from django import template

from datetime import datetime, timedelta

register = template.Library()

@register.tag

def rowcolour(parser, token):

nm, dt, fmt = token.split_contents() # this is line 7

diff = datetime.now() - dt

if diff.days > 14:

return "pinkrow"

else:

return "greyrow"

... here is the line in the html file:

<tr id="{% rowcolour flow.created %}">

... and "created" is defined as follows in the model:

created = models.DateTimeField(db_index=True, auto_now_add=True)

I'm trying to extract the datetime from the token.  Any ideas?

Thanks.

[Daniel Roseman]

Like the error says, you are telling it to split the result of `token.split_contents()` into three variables, but you are only passing it two elements: "rowcolour" and "flow.created". Where is `fmt` supposed to be coming from?

However, even when you fix that, this still won't work, as at that point `dt` will just be the string "row.created". You need to have a whole template Node in order to resolve variables like that. Why are you not using the `simple_tag` decorator, which is a shortcut for that whole process?

@register.simple_tag

def rowcolour(dt):

diff = datetime.now() - dt

...etc...

--

DR.

[Daniel Grace]

I got it working thanks.  My template tag file is as follows:

from django import template

from django.utils import timezone

register = template.Library()

@register.simple_tag

def rowcolour(dt):

diff = timezone.now() - dt