What do you think about here lambda function to configure TEMPLATE_DIRS with relatives values ?

[klein.s...@gmail.com]

Hi,

When I configuration my TEMPLATE_DIRS in settings.py file, I use ever
"here" or
"here_cross" lambda function defined like this :

::

import os
here = lambda x: os.path.join(os.path.abspath(os.path.dirname
(__file__)), x)
here_cross = lambda x: os.path.join(os.path.abspath(os.path.dirname
(__file__)), *x)

I can configure TEMPLATE_DIRS or MEDIA_ROOT like this :

::

MEDIA_ROOT = ''


TEMPLATE_DIRS = (
# Put strings here, like "/home/html/django_templates" or "C:/
www/django/templates".
# Always use forward slashes, even on Windows.
# Don't forget to use absolute paths, not relative paths.
here('myapp/templates'),
here_cross(('otherapp', 'templates')),
)

I suppose that this comment "Don't forget to use absolute paths, not
relative paths" is
relevant if I don't use "here" or "here_cross" function. If I don't
use it,
template paths are relative to current working directory and not to
"settings.py" file.

What do you think about this method (using here) ?
Why don't put "here" or/and "here_cross" in Django settings.py
skeleton ?

Note, I found here and here_cross tip on this page :
http://www.djangosnippets.org/snippets/445/

Thanks for your comment.
Regards,
Stephane

[KLEIN Stéphane]

Sorry, I've some break line issue in my previous post.
This is my post cleaned.

Hi,

When I configuration my TEMPLATE_DIRS in settings.py file, I use ever
"here" or "here_cross" lambda function defined like this :

::

import os
here = lambda x: os.path.join(os.path.abspath(os.path.dirname
(__file__)), x)
here_cross = lambda x: os.path.join(os.path.abspath(os.path.dirname
(__file__)), *x)

I can configure TEMPLATE_DIRS or MEDIA_ROOT like this :

::

MEDIA_ROOT = ''


TEMPLATE_DIRS = (
# Put strings here, like "/home/html/django_templates" or "C:/
www/django/templates".
# Always use forward slashes, even on Windows.
# Don't forget to use absolute paths, not relative paths.
here('myapp/templates'),
here_cross(('otherapp', 'templates')),
)

I suppose that this comment "Don't forget to use absolute paths, not
relative paths" is relevant if I don't use "here" or "here_cross"
function. If I don't use it, template paths are relative to current
working directory and not to "settings.py" file.

What do you think about this methode (using here) ?

[Michael]

If it works for you, it works. Personally I find lambdas a little difficult to read, and personally in this situation, I just put:

os.path.normpath(os.path.join(os.path.dirname(__file__), 'otherapp', 'templates'))

inside of TEMPLATE_DIRS directly. I find that clearer to see what is happening, it is all in one line and still really simple.

But what works for you works for you.

Michael 

[Darryl Ross]

Hi Stephane,

I think it is a great idea. The lambda trick means I don't have to make
any changes at all to switch between my development environment and
production. A real life example from a current project:

-----

from os.path import abspath, dirname, join
APP_PATH = lambda *x: abspath(join(dirname(__file__), *x))

MEDIA_ROOT = APP_PATH('webroot', 'media')
TEMPLATE_DIRS = (
APP_PATH('templates'),
)

-----

Note the * on the definition for x which means you only need one lambda.

On my production machines, the websites typically run from

/home/httpd/<domain>

but on my development machine (my laptop), they run from

/home/darryl/devel/websites/<customer>/<domain>

Cheers
Darryl